88th GAMM Annual Meeting

Ilmenau@Weimar | March 6-10,2017

Program

Local Organizing Committee	Program Committee
Ilmenau Carsten Trunk Hans Babovsky Achim Ilchmann Thomas Fröhlich Christian Karcher Johann Reger Jörg Schumacher Karl Worthmann Klaus Zimmermann Weimar Carsten Könke Klaus Gürlebeck Tom Lahmer	Marco Cicalese, München Wolfgang Ehlers, Stuttgart Michael Günther, Wuppertal Klaus Hackl, Dortmund Stefan Hartmann, Clausthal Roland Herzog, Chemnitz Michael Kaliske, Dresden Axel Klawonn, Köln Volker Mehrmann, Berlin Ralf Müller, Kaiserslautern Sven Klinkel, Aachen Carsten Könke, Weimar Bernd Schmidt, Augsburg Bernhard Schweizer, Darmstadt Robert Seifried, Hamburg Stefan Turek, Dortmund Carsten Trunk, Ilmenau Fabian Wirth, Passau Olaf Wünsch, Kassel

Local Organizing Committee

Program Committee

Ilmenau

Carsten Trunk
Hans Babovsky
Achim Ilchmann
Thomas Fröhlich
Christian Karcher
Johann Reger
Jörg Schumacher
Karl Worthmann
Klaus Zimmermann

Weimar

Carsten Könke
Klaus Gürlebeck
Tom Lahmer

Marco Cicalese, München
Wolfgang Ehlers, Stuttgart
Michael Günther, Wuppertal
Klaus Hackl, Dortmund
Stefan Hartmann, Clausthal
Roland Herzog, Chemnitz
Michael Kaliske, Dresden
Axel Klawonn, Köln
Volker Mehrmann, Berlin
Ralf Müller, Kaiserslautern
Sven Klinkel, Aachen
Carsten Könke, Weimar
Bernd Schmidt, Augsburg
Bernhard Schweizer, Darmstadt
Robert Seifried, Hamburg
Stefan Turek, Dortmund
Carsten Trunk, Ilmenau
Fabian Wirth, Passau
Olaf Wünsch, Kassel

Book of Abstracts

https://jahrestagung.gamm.org/wp-content/uploads/2020/07/170304_BoA_GAMM_2017.pdf

GAMM related DFG

The sessions introduce currently running Priority Programmes of the Deutsche Forschungsgemeinschaft which are related to topics of the GAMM.

PP01 Reliable simulation techniques in solid mechanics. Development of non-standard discretization methods, mechanical and mathematical analysis
Organizer: Jörg Schröder (Duisburg-Essen)
PP02 Reactive bubbly flows
Organizer: Michael Schlüter (TU Hamburg-Harburg)
PP03 Field controlled particle matrix interactions: synthesis multiscale modelling and application of magnetic hybrid materials
Organizer: Stefan Odenbach (TU Dresden)
PP04 Calm, smooth and smart
Organizer: Peter Eberhard (Stuttgart)
PP05 Non-smooth and complementarity-based distributed parameter systems: simulation and hierarchical optimization
Organizer: Michael Hintermüller (Weierstraß-Insitut für Angewandte Analysis und Stochastik Berlin)
PP06 Polymorphic uncertainty modelling for the numerical design of structures
Organizer: Michael Kaliske (TU Dresden)
PP07 Turbulent superstructures
Organizer: Jörg Schumacher (TU Ilmenau)

Ludwig Prandtl Memorial Lecture

Prof. Howard Stone
Some variants of classical multiphase flow problems

Abstract:
I will briefly discuss three problems that have classical roots and in each case seek to add one new feature to a modern version of the problem. In the first problem the Saffman-Taylor viscous fingering problem is discussed for the case that there are geometric variations in the flow directions – we show via experiments and theory that such changes can significantly modify the stability features of the flow. In the second problem we consider the low Reynolds number motion of a hot sphere in a fluid accounting for the variations of the viscosity with temperature – we show that the Lorentz Reciprocal Theorem provides a means to construct an analytical representation of the force and torque on the sphere for the case of small viscosity variations. Finally, we present experiments of unexpected dynamics in modest Reynolds number flows at a T-junction and rationalize the results by demonstrating the connections to vortex breakdown.

Chair: Prof. Dr.-Ing.habil. Martin Oberlack

Minisymposia

MS 1 Innovative discretization methods, mechanical and mathematical investigations

Organizers: Stefanie Reese (Aachen), Hamid Reza Bayat (Aachen), Stephan Wulfinghoff (Aachen)

MS 2 Recent trends in phase-field modelling

Organizers: Laura de Lorenzis (Braunschweig), Bernd Markert (Aachen)

MS 3 Dislocation-based plasticity: State of the art and challenges

Organizers: Katrin Schulz (Karlsruhe), Eric Bayerschen (Karlsruhe), Thomas Böhlke (Karlsruhe)

MS 4 Nonlinear approximations for high-dimensional problems

Organizers: Markus Bachmayr (Paris), Ivan Oseledets (Skolkovo, Russia)

MS 5 Structured pseudospectra and stability radii: applications and computational issues

Organizers: Nicola Guglielmi (L’ Aquila, Italy), Michael Karow ( Berlin)

MS 6 Turbulent liquid metal and magnetohydrodynamic flows

The goal of the minisymposium is to present an actual overview of the research activities in the field of turbulent liquid metal and magnetohydrodynamic flows. Laminar and turbulent flows in liquid metals and alloys with and without magnetic fields span a broad range of applications. They span from complex fluid motion inside stars or the liquid metal core of the Earth via nuclear engineering, material processing and steel casting to innovative energy storage devices such as liquid metal batteries. Liquid metal flows are opaque, often composed of hot and aggressive substances. The dimensionless parameters that quantify momentum and heat transfer can differ by orders of magnitude from those of other fluids. All this gives rise to significant challenges in their experimental analysis, their numerical computation and their theoretical modeling.

Organizers: Jörg Schumacher (Ilmenau), Leo Bühler (Karlsruhe)

MS 7 Flow Separation and vortical phenomena: Simulation in progress

Flow separation, in example flow separation at backward-facing steps or behind cylinders, is a fundamental topic of fluid dynamics. Although numerous experimental and numerical investigations have been carried out, a full insight and a complete understanding of the physics of separating flows and adjacent vortex formation is not given. The major reason for this lies in the fact that in most cases an analytical solution for the flow field is not available, in particular when transitional and turbulent flow phenomena have to be considered. This minisymposium addresses specific flow separation phenomena associated with fluid, turbulent and transitional properties. Possibilities of flow control technologies, changing the flow behavior essentially, will be discussed.

Organizers: Markus Rütten (DLR, Göttingen), Wolfgang Schröder (Aachen)

Plenary Lectures

Plenary Lectures – Mathematics

1. Ulrich Rüde
(Erlangen-Nürnberg, Germany)

Simulating Coupled Problems on a Million Processor Cores

All modern computer architectures are parallel, not only supercomputers, but even works stations and smart phones. For technological and physical reasons the clock rate of processors cannot be increased further so that only the number of transistors on each chip keeps increasing. In consequence, parallel algorithms are required for all state-of-the-art computing. This is particularly true for demanding coupled systems in science and engineering. We will present two examples. The Earth Mantle is a spherical shell with a volume of a trillion (1012) cubic kilometers. Mantle convection can be modeled by an indefinite finite element problem. We will demonstrate that matrix free parallel multigrid methods can solve such systems with currently up to 1013 (ten trillion) degrees of freedom on almost half a million processor cores in compute times of a few minutes. A second example will be motivated by 3D printing as a modern additive manufacturing technology. We will show how the process can be simulated by a complex combination of rigid granular dynamics and lattice Boltzmann methods. The scenario involves the generation of a powder bed, controlled energy transfer with an electron beam, melting of the particles, flow of the molten metal, and solidification. With supercomputers, a direct numerical simulation is possible, i.e. representing the physics with full geometric and temporal resolution of each particle and modeling the melt flow subject to surface tension and contact angle conditions.

2. László Székelyhidi
(Leipzig, Germany)

The h-principle in fluid mechanics: non-uniqueness and energy dissipation

It is known since the pioneering work of Scheffer and Shnirelman in the 1990s that weak solutions of the incompressible Euler equations behave very differently from classical solutions, in a way that is very difficult to interpret from a physical point of view. Nevertheless, weak solutions in three space dimensions have been studied in connection with a long-standing conjecture of Lars Onsager from 1949 concerning anomalous dissipation and, more generally, because of their possible relevance to Kolmogorov’s K41 theory of turbulence.
In joint work with Camillo De Lellis we established a connection between the theory of weak solutions of the Euler equations and the Nash-Kuiper theorem on rough isometric immersions. Through this connection we can interpret the wild behaviour of weak solutions of the Euler equations as an instance of Gromov’s celebrated h-principle.
In this lecture I will explain this connection and outline the most recent progress concerning Onsager’s conjecture.

3. Oliver Ernst
(Chemnitz, Germany)

Uncertainty Quantification: Propagation and Inference

The dynamically growing scientific discipline of Uncertainty Quantification (UQ) addresses the numerous sources of uncertainty in complex simulations of scientific and engineering phenomena in order to assess the validity, reliability and robustness of the results of such simulations. In this regard, it represents a key enabling technology for what is now called Predictive Computational Science.

In this talk we focus on two key UQ components. The first, uncertainty propagation, is concerned with solving a random differential equation, by which is meant a differential equation containing uncertain data modeled by a probability law. We highlight recent developments in collocation methods which address the situation where the uncertain data is parameterized by a countably infinite number of random parameters. In the second part of the talk we present numerical methods for performing Bayesian inference on such random data as a systematic way of merging observational data with a given probabilistic model. The challenge here is to efficiently sample from the posterior distribution in an infinite-dimensional state space with cost that is robust with respect to state space resolution and the variance of the observational noise.

4. Jean-Michel Coron
(Paris, France)

On the stabilization of control systems

A control system is a dynamical system on which one can act by using controls. For these systems a fundamental problem is the stabilization issue: Is it possible to stabilize a given unstable equilibrium by using suitable feedback laws? (Think to the classical experiment of an upturned broomstick on the tip of one’s finger.) On this problem, we present some pioneer devices and works (Ctesibius, Watt, Maxwell, Lyapunov…), some more recent results, and an application to the regulation of the rivers La Sambre and La Meuse in Belgium. Highlights are put on time-varying feedback laws, hyperbolic 1-D hyperbolic systems as well as positive or negative effects of the nonlinearities.

Plenary Lectures – Mechanics

1. Stefan Diebels
(Saarbrücken, Germany)

Beyond uniaxial tension – current trends in experimental mechanics

The phenomenological approach of continuum mechanics is based on axioms and on experiments. While the balance equations are accepted as physical laws experiments form the basis of constitutive modelling, e.g. the quality of a stress-strain relation at finite deformations strongly depends on the underlying data. On the one hand, experiments leading to homogeneous stress and strain states are typically preferred due to their simple evaluation. On the other hand, multiaxial stress and deformation states are required to match the three dimensional state in a real component. Even if it is still an unsolved task to measure inhomogeneous stress distributions in a specimen, optical strain measurement became a very powerful tool to reconstruct the inhomogeneous displacement field at least on the surface of a specimen. Therefore, the evaluation of inhomogeneous experiments, e.g. true biaxial tests, offers new possibilities in the validation of constitutive equations. In most cases, due to the inhomogeneity and the non-linearity of the resulting boundary value problem, the identification of the material parameters becomes an inverse problem. The present contribution addresses the application of modern experimental techniques for the design of experiments, their realisations and, finally, the parameter identification. Special focus is given to inhomogeneous experiments and to the miniaturisation of experiments.

2. Christian Bucher
(Wien, Austria)

Stochastic structural mechanics – from probability theory to structural design

Structural mechanics since its beginnings has developed very strongly with respect to more accurate modelling and analysis. A key role in this development play numerical methods, especially those based on the concept of finite elements. This high degree of presision, however, is undermined by imprecise and/or incomplete knowledge about the describing parameters of the models and the environmental actions on the structures, such as e.g. wind or earthquakes. Even with a substantially increased effort for experimental evidence, it is frequently not possible to arrive at deterministic descriptions for these parameters. Therefore uncertainty-based (e.g. probabilistic) analysis becomes mandatory. This lecture will highlight some selected points how stochastic structural mechanics can contribute to solve open problems related to the development of structural design procedures.

3. Pierre Suquet
(LMA, CNRS, Marseille, France)

Model-Reduction in Micromechanics of Materials

A common practice in structural problems involving heterogeneous materials with well separated scales, is to use homogenized, or effective, constitutive relations. In linear elasticity the structure of the homogenized constitutive relations is strictly preserved in the change of scales. The linear effective properties can be computed once for all by solving a finite number of unit-cell problems.
Unfortunately there is no exact scale-decoupling in multiscale nonlinear problems which would allow one to solve only a few unit-cell problems and then use them subsequently at a larger scale. Computational approaches developed to investigate the response of representative volume elements along specific loading paths, do not provide constitutive relations. Most of the huge body of information generated in the course of these costly computations is often lost.
Model reduction techniques, such as the Non Uniform Transformation Field Analysis, may be used to exploit the information generated along such computations and, at the same time, to account for the commonly observed patterning of the local plastic strain field. A new version of the model will be proposed in this talk, with the aim of preserving the underlying variational structure of the constitutive relations, while using approximations which are common in nonlinear homogenization.

4. Daniel Rixen
(München, Germany)

Experimental substructuring: assembly of measured components for noise and vibration analysis

Many components in modern product cannot be modeled easily or properly: they need to be characterized experimentally. In vibration analysis of complex structural and mechatronical systems, it is highly desirable to build models of assemblies where some components are modeled numerically (e.g. by Finite Elements) whereas others are characterized experimentally. Building substructured models from experimental measurements enables engineers to rapidly detect troublesome parts, identify excitation sources and optimize the dynamics of their design. Such strategies form the basis of so-called Transfer Path Analysis techniques (TPA).
Although the mathematical theory of TPA is rather straightforward, its mechanical interpretation is not intuitive and applying simple ideas to real measurements is a real challenge. If you think that measurements are always the reality … think again: measured dynamic properties of structures (typically Frequency Response Functions) are not only inaccurate, but do often not even satisfy fundamental mechanical properties such as passivity or reciprocity. Such errors render a straightforward application of the theory illusory.
In the presentation, we will discuss a framework to describe the simple algebra needed in substructuring techniques for structural vibration analysis and we will discuss how the vibration source of active components can be indirectly measured. Also we will outline some important tricks and twists that are needed to use measured components in an assembly. The methods will be illustrated on an industrial example.

Podiumsdiskussion

Podiumsdiskussion: Drittmittel - Einblicke in die Praxis

Dienstag, 18:45 Uhr, in der Weimarhalle mit:

Dr. Frank Kiefer (DFG)
Dominik Maas (Kooperationsstelle EU der Wissenschaftsorganisationen – KoWi)
Claudia Schillings (GAMM Juniors)
Prof. Dr. Volker Mehrmann (TU Berlin)

Es gibt die Möglichkeit, Fragen zu stellen. Moderation:

Marco Frezzella (Pressesprecher der TU Ilmenau)

Poster session

Poster session of the GAMM Juniors

GAMM Juniors are representatives of the young scientific generation in the fields of Applied Mathematics and Mechanics who represent these scientific fields within the academic research and the society. Activities include the contribution to the Committee “Future of GAMM” to support young researchers’ activities, organization of interdisciplinary workshops and summer schools for young scientists and the establishment of networking among young researchers in the GAMM. In their poster session the GAMM Juniors present aspects of their current research from different fields of Applied Mathematics and Mechanics.

Organizers:

Dominik Kern (TU Chemnitz)
Melanie Todt (TU Wien)

Variational Integrators for Standard and Non-standard Heat Transfer
PhD Dominik Kern | TU Chemnitz | Germany
High performance optimization algorithms for interface identification problems
Martin Siebenborn | Germany
Shell-based ply-level models of layered composites
Melanie Todt | TU Wien, Institute of Lightweight Design and Structural Biomechanics | Austria
Stress-based mixed finite elements for elasticity
PhD Fleurianne Bertrand | Germany
Structure-Preserving Optimal Control for Mechanical Systems
PhD Kathrin Flaßkamp | Universität Bremen | Germany
Economic model predictive control
Matthias A. Müller | University of Stuttgart | Germany
Edge, Ridge and Blob Detection With Symmetric Molecules
Rafael Reisenhofer | Universität Bremen | Germany
Reduced order homogenization for nonlinear composite materials with imperfect interfaces at the phase boundaries
Matthias Leuschner | University of Stuttgart | Germany
Error Estimation in Multiphysics Problems using Runge Kutta Methods with Additive Partitioning
Ulrich Römer | Technische Universität Darmstadt | Germany
Rank-one convexity implies polyconvexity for isotropic energies on SL(2)
PhD Robert Martin | Germany
Stress-Based and Strain-Based Blood Damage Estimation for Medical Device Design
Lutz Pauli | RWTH Aachen University, Chair for Computational Analysis of Technical Systems | Germany
Feature Selection From Real-World Data With Non-Linear Observations
Martin Genzel | TU Berlin | Germany
A polyconvex phase-field approach to fracture with application to finite-deformation contact problems
PhD Marlon Franke | Karlsruhe Institute of Technology | Germany
Approximation of Generalized Ridge Functions in High Dimensions
Sandra Keiper | Germany

Public Lecture

Dr. Christiane Heinicke

Mein Leben auf dem Mars – Ein Erlebnisbericht von der NASA-Marssimulation –

Christiane Heinicke hat auf dem Mars gelebt. Zumindest fast. Die Physikerin und Ingenieurin verbrachte zwölf Monate in der Forschungsstation HI-SEAS unter marsähnlichen Bedingungen. Mit fünf anderen Freiwilligen lebte sie abgeschnitten vom Rest der Welt an den steinigen Hängen des Mauna Loa-Vulkans. Kontakt mit anderen Menschen hatte die Crew nur per Email und verlassen konnten sie ihr kuppelförmiges Habitat nur in simulierten Raumanzügen. Seit ihrer Rückkehr in ihre Geburtsstadt genießt Christiane Heinicke die kleinen Freuden, wie bei offenem Fenster schlafen und frisches Obst essen zu können, wann immer es ihr beliebt. Und doch, so überraschend es erscheinen mag, fand sie das Leben auf dem simulierten Mars gar nicht so abschrecked und vermisst manche Aspekte davon regelrecht. Und genau darum soll es in dem Vortrag gehen: die Herausforderungen des alltäglichen Lebens auf dem Mars, aber auch seine Vorzüge.

Dr. Rolf Densing

Höhepunkte Europäischer Raumfahrt

Dr. Rolf Densing, ESA-Direktor für Missionsbetrieb und Leiter des Raumfahrtkontrollzentrums (ESOC) berichtet über die Höhepunkte der ESA-Satelliten wie Rosetta und ExoMars, von der Erkundung ferner Galaxien sowie der Beobachtung unseres blauen Planeten durch Satelliten in niedriger Erdumlaufbahn. Lassen Sie sich faszinieren von einem Blick hinter die Kulissen der ESA-Satellitenoperationen!

Sections and Organizers

S01 Multi-body dynamics

Multibody dynamics enables the simulation of a wide variety of systems, all characterized by having multiple parts in relative motion with one another. Applications span from biological to engineering systems, requiring diverse capabilities which range from real-time simulation to high fidelity modeling of complex multidisciplinary systems. Goal of this mini-symposium is to present a view on the latest developments in models and advanced numerical methods in multibody dynamics. Focus is on techniques that enable applications to complex real-life problems.

Jörg Fehr (Stuttgart)
Jürgen Pannek (Bremen)

S02 Biomechanics

Section S02 will focus on numerical and experimental techniques to study the structure, function and evolution of biological systems for a broad spectrum of scales, i.e., addressing the cellular, tissue, organ, or organ system scale. The topics will focus on, but are not limited to, multiscale modelling, gait analysis, foot biomechanics, musculoskeletal and orthopedic biomechanics, remodeling, cardiovascular biomechanics, multiphase modeling of biological tissues, tumor growth modeling, transport oncophysics, nanomechanics of biological materials, nanomedicine, modeling of drug delivery, and image-based methods for assessing and interpreting clinical data.

Gerhard Holzapfel (Graz)
Udo Nackenhorst (Hannover)

S03 Damage and fracture mechanics

Failure of materials and structural components is an important issue as long as man-made constructions exist. The section focuses on damage mechanics and fracture mechanics for all kinds of solid materials and structures. It aims at bringing together related original research covering experimental observations, modeling approaches and numerical techniques. Moreover, material failure is a complex process, which may be considered on different length scales ranging from atomistic scale up to macro scale of engineering structures. Since failure behavior of materials strongly depends on loading situations, contributions addressing static, dynamic and multi-axial failure are welcome as well as fatigue problems.

Martin Hofmann (Dresden)
Andreas Ricoeur (Kassel)

S04 Structural mechanics

The section will focus on advanced theoretical, numerical and experimental models for the evaluation of the behavior of structures. The diffusion of innovative materials characterized by high strength, anisotropy and unconventional mechanical responses (metamaterials) pose new challenges to the design and the performance of various structural elements like beams, plates and shells. In particular, structural issues may appear at different scales when materials with an internal architecture are employed. Particularly welcome are models and algorithms for structures that address nonlinear material behaviors and investigate structural stability at different scales.

Sven Klinkel (Aachen)
Jens Wackerfuß (Kassel)

S05 Nonlinear oscillations

The section covers all fields of vibrational problems in solid mechanics or mechatronics including nonlinear effects. Submissions may address, for example, systems with nonlinear material behavior, nonlinearities in joints, mathematical solution methods (analytical or numerical), control or description of nonlinear behavior like bifurcations or chaos, or experimental idendification of nonlinearities.

Hartmut Hetzler (Kassel)
Dieter Lens (Darmstadt)

S06 Material modelling in solid mechanics

The section focuses on constitutive modelling of natural and artificial materials subject to elastic and inelastic deformation processes. The aim is to compare new constitutive models formulated on both the phenomenological and the micromechanics basis to determine their validity by comparison of simulations with experiments. A wide range of open problems will be considered in the section, like multi-scale modelling of heterogeneous materials, implementation of constitutive models in numerical applications, and the virtual testing of structural systems.

Michael Johlitz (München)
Alexander Lion (München)

S07 Coupled problems

Coupled problems arise in several applications. From a general point of view each problem containing more than one primary field is called a coupled one. Usually the class of coupled problems is subdivided into volumetrically coupled problems and problems with surface coupling. The class of volumetrically coupled problems contains e.g. the fluid flow in porous solids described by mixture theory, thermo-mechanically coupled problems, chemo-mechanically coupled problems and electro- or magneto-mechanically coupled problems while in the second class problems like the fluid-solid interaction via an interface are included. All problems is in common that the presence of different fields in the numerical treatment requires special attention with respect to the multi-field formulation and the solution strategy. The session on coupled problems deals with all aspects mentioned above, i.e. ranging from modelling aspects to numerical solution strategies.

Ralf Jänicke (Göteborg)
Detlef Kuhl (Kassel)

S08 Multiscales and homogenization

This section is dedicated to discuss recent advances in multiscale and homogenization techniques for static and dynamic problems. Topics of particular interest are nonlinear homogenization techniques, multiscale modelling of failure processes and localization phenomena, FE2 methods, atomistic to continuum coupling, contact homogenization, model reduction techniques and furthermore homogenization schemes incorporating experimentally determined microstructure data.

Bernhard Eidel (Siegen)
Stefan Löhnert (Hannover)

S09 Laminar flows and transition

This section will focus on the analysis and modeling of transition from laminar to turbulent flow using DNS, LES, RANS equations, and experiments. Contributions are expected in, but not limited to, the following topics: stability of incompressible and compressible flows, fundamental study of the dynamics of transition, influence of the wall roughness on transition, transition modelling for LES and RANS equations, transition in flows with complex geometries, subcritical transition.

Gunther Brenner (Clausthal)
Bettina Frohapfel (Karlsruhe)

S10 Turbulence and reactive flows

The topic of this session is the analysis and modeling of turbulent non-reactive and reactive flows based on DNS, LES, RANS, and experiments. A special focus is on fundamentals in turbulence, turbulent reactive flows, turbulent multi-phase flows, modeling and simulation of complex turbulent flows, the interface of numerical algorithms, chemical and physical modeling, as well as high-performance computing with its application to turbulence.

Martin Oberlack (Darmstadt)

S11 Interfacial flows

The understanding and control of interfacial phenomena is one of the main challenges in multiphase fluid mechanics, at the crossroads of scientific disciplines like Mathematics, Physics, Chemistry and Engineering. Examples are particle-laden flows, bubble columns, flows with cavitation, jet atomization, casting, oil recovery, film, boiling and foaming flows, as well as spreading and dewetting of (complex) liquids and biofluids. All these systems are central for technological advances in the chemical, pharmaceutical, energy, environmental and food industries. In addition, their behavior depends strongly on the typical time and length scales under consideration that are for example crucial for the development of micro and nano fluidics. In the latter case the validity of continuum fluid mechanics might be even questionable. The goal of this section is to provide an overview of the latest developments in this area, covering models at different scales, numerical, statistical and cognitive methods as well as experimental techniques but also surveying new physical insight and recent technical advancements.

Jochen Fröhlich (Dresden)
Michael Manhart (München)

S12 Waves and acoustics

Waves are a ubiquitous natural phenomenon and acoustics are, besides surface water waves, the most obvious representatives, familiar to anybody and quantitatively known to any student of mathematics, physics or a technical subject. To this corresponds a long mathematical tradition, continuing today in the accurate numerical computation of linear and nonlinear wave phenomena. Our session is devoted to the simulation and understanding of waves and wave interactions. The range of applications is thus very broad, while the focus is meant to be on the unifying physical phenomenon. In the past years we had numerous contributions from solid mechanics, porous media flow, turbulence and aeroacoustics, from crack detection to explosions.

Barbara Kaltenbacher (Klagenfurt)
Manfred Kaltenbacher (Wien)

S13 Flow control

Many technical applications involving flows profit from trying to manipulate the boundary conditions or flow parameters in such a way as to generate a desired effect, like reduced drag, increased mixing, attenuated or increased turbulence or reduced sound emission, for example. The sophistication of the governing equations requires a broad range of research topics and methods to be covered, including analytical treatments, reduced-order modelling, passive manipulation of boundaries in experiments involving riblets, active manipulations using actuators, for example, or numerical approaches involving the adjoint equations, amongst others. The speakers of our session reflect the broad application area of flow control and discuss difficulties in the application side and recent advances in the analysis, as well as experimental and numerical approaches.

Holger Foysi (Siegen)
Nicolas Gauger (Kaiserslautern)

S14 Applied analysis

This session is devoted to the mathematical analysis of natural phenomena and engineering problems. In this area PDEs play a basic role. Therefore lectures discussing analytical aspects of PDE problems as well as problems in the Calculus of Variations are welcome.

Maria Neuss-Radu (Erlangen-Nürnberg)
Marita Thomas (Berlin)

S15 Uncertainty Quantification (replacement for Applied stochastics)

The session especially welcomes contributions to the following topics: uncertainty quantification; risk analysis and assessment; Bayesian methods in engineering; decision analysis; stochastic modeling (including spatio-temporal modeling); stochastic mechanics; stochastic algorithms and simulation; stochastic processes (including time series); resampling methods; stochastic networks. Applications to large scaled problems are encouraged.

Martin Eigel (Berlin)
Elisabeth Ullman (München)

S16 Optimization

Optimization is the next natural step after simulation with increasing importance in the future. The aim of this session is to provide the basis of a holistic overview of all areas of optimization. Thus abstracts from both a theoretical as well as an applied perspective are welcome.

Michael Stingl (Erlangen)
Gerd Wachsmuth (Chemnitz)

S17 Applied and numerical linear algebra

The aim of this section is to bring together experts in the field of applied and numerical linear algebra, discussing recent theoretical and algorithmic developments.

Sara Grundel (Magdeburg)
Karsten Kahl (Wuppertal)

S18 Numerical methods of differential equations

For all fields of applications the mathematical models are primarily based on differential equations. Hence, their numerical solution plays a fundamental role in numerical mathematics. This section covers mainly the construction and the behavior of numerical methods for differential equations including those of ordinary as well as of partial differential type.

Rolf Krause (Lugano, Schweiz)
Gerhard Starke (Essen)

S19 Optimization of differential equations

In this session novel developments devoted to optimization and optimal control problems governed by ordinary or partial differential equations will be discussed. The focus is on theoretical investigations, numerical analysis, algorithmic issues as well as on application.

Ira Neitzel (Bonn)
Johannes Pfefferer (München)

S20 Dynamics and control

Dynamics and control is an interdisciplinary section which in particular adresses mathematical systems theory and control engineering. The contributions to this section are also concerned with the mathematical understanding and design of controllers which appear in actual applications.

Matthias Müller (Stuttgart)
Karl Worthmann (Ilmenau)

S21 Mathematical signal and image processing

Over the last decade mathematics has become the cornerstone in Signal and Image processing ranging from various methods for signal reconstruction to modelling of imaging modalities over its classical disciplines compression, denoising, segmentation, and registration to feature extraction. The used methodologies include such diverse fields as harmonic analysis, inverse problems, variational analysis, mathematical statistics, partial differential equations, optimization, approximation theory and sampling theory. The aim of this section is to foster interdisciplinary collaboration and the development of new directions in mathematical signal and image processing spawned from the interaction of various mathematical communities.

Jan Lellmann (Lübeck)
Gabriele Steidl (Kaiserslautern)

S22 Scientific computing

Scientific Computing is concerned with the efficient numerical solution of mathematical models from both science and engineering. The field covers a wide range of topics: from mathematical modeling over the development, analysis and efficient implementation of numerical methods and algorithms to software and finally application for the solution of complex real-world problems on modern computing systems. This interdisciplinary field combines approaches from applied mathematics, computer science and a wide range of applications in which in-silico experiments play an increasingly important role.

Philipp Birken (Schweden)
Gregor Gassner (Köln)

S23 Applied operator theory

The session welcomes talks in operator theory, including: differential operators, operator semigroups, spectral and perturbation theory, operators in indefinite inner product spaces, function spaces, general functional analysis and mathematical physics.

Rainer Picard (Dresden)
Sascha Trostorff (Dresden)

S24 History of fluid mechanics and history, teaching and popularization of mathematics

This section will provide a forum for the presentation of historical and/or speculative studies on mechanics focusing on the relations between concepts from antiquity up to now, which could be of interest to historians of mechanics and physics as well as researchers in mechanics. The contributions of those authors who have benefited from the study of old theories for developing current models in the field of applied mechanics and mathematics will be also considered. This in order to highlight the importance of historical and epistemological perspective setting for the current and future developments in science. With these aims in mind, topics of applications will include (but are not limited to): -Virtual work laws -Variational methods and conservation principles -Molecular foundation for continuum mechanics -Coarse graining processes and the use of Cauchy-Born rule -Continuum and statistical thermodynamics -Material deformation theories and experimental results in solid mechanics -Inelastic deformations, damage and fracture -Development and use of the Ricci’s tensor calculus in deformation theories of solids, shells and fluids -Mechanical models for ancient constructions

Simon Eugster (Stuttgart)
Daniel Karrasch (München)

GAMM related DFG Priority Programmes

The sessions introduce currently running Priority Programmes of the Deutsche Forschungsgemeinschaft which are related to topics of the GAMM.

Turbulent superstructures
(DFG Priority Programme 1881)

Reliable simulation techniques in solid mechanics. Development of non-standard discretization methods, mechanical and mathematical analysis
(DFG Priority Programme 1748)

Reactive bubbly flows
(DFG Priority Programme 1740)

Field controlled particle matrix interactions: synthesis multiscale modeling and application of magnetic hybrid materials
(DFG Priority Programme 1681)

Calm, smooth and smart
(DFG Priority Programme 1897)

Non-smooth and complementarity-based distributed parameter systems: Simulation and hierarchical optimization
(DFG Priority Programme 1962)

Polymorphic uncertainty modeling for the numerical design of structures
(DFG Priority Programme 1886)

– Polymorphic Uncertainty Models in Multiphase-Multiphysic Problems
(Tom Lahmer, Carsten Könke, Albrecht Schmidt, Long Nguyen-Tuan)
– On Using Fuzzy Arithmetic in Optimization Problems with Uncertain Constraints
(Markus Mäck, Michael Hanss)
– On uncertainty in friction measurement
(Ostermeyer, G.-P., Müller, M., Srisupattarawanit, T., Völpel, A.)
– A collocation based probability-box approach for imprecise models in computational mechanics
(Mona M. Dannert, Amelie Fau, Metteo Broggi, Udo Nackenhorst, Michael Beer)
– Polymorphic Uncertainty Modelling for the Numerical Design of Structures (SPP 1886)
(Michael Kaliske, Fabian Duddeck)

Social Program

Bauhaus Walk

Price: included in registration fee
Length of tour: approx. 2 hours
Reservation: during registration

The Bauhaus-Universität Weimar is known as a place of architecture, art, design and engineer-ing. It is the birth place of the famous Bauhaus. We encourage all participants and accompany-ing persons to have a walk through Weimar, to follow the traces of the early Bauhaus, and to experience the exciting past and present of the Bauhaus-Universität Weimar. Here you will visit the office of the first director of the Bauhaus, Walter Gropius. The tour will be offered at different times during the conference and it will be free of charge.
For details see http://www.uni-weimar.de/en/university/profile/bauhausatelier/bauhaus-walk/

Anna Amalia Library

Price: 7,50 € per person
Length of tour: approx. 1 hours
Reservation: during registration

The Duchess Anna Amalia Library is named after Anna Amalia, Duchess of Saxe-Weimar-Eisenach, who arranged in 1766 for the courtly book collection to be moved into the library. The library contains more than 2.000 medieval manuscripts, historical registers, maps, and musical scripts. The library’s most famous patrons was Johann Wolfgang von Goethe who was responsible from 1797 to 1832.

Guided tours through Weimar

For all participants it is possible to book guided tours through Weimar. These tours are organized by the Klassik Stiftung Weimar (http://www.klassik-stiftung.de). Tours with different topics will be offered including the residential houses of Friedrich Schiller, Johann Wolfgang von Goethe and Franz Lizst.

For these tours additional fees between 3 and 5 Euros need to be payed.

Day tips

For accompanying persons day tours to the neighboring cities like Erfurt, Jena, and Eisenach together with a visit of the Wartburg are charming events. We will not provide fully organized trips but may help in the organization of such excursions.

Wartburg Eisenach

Bachhaus Eisenach

Weimar Tourist Information
At Markt 10 is the first port of call for visitors to Weimar – and is also popular among local residents! The staff can help you with all your tourism enquiries – and if you’ve any requests, they’ll do their utmost to find a solution.

Journey to Weimar
Annika Eheim, a member of the Bauhaus-Universität Weimar, gives you a short insight in the new visitor guide “Journey to Weimar”.

YAMM

Young Academics in Applied Mathematics and Mechanics: Career Opportunities for Young Academics

You are a young academic in the final stage of your PhD or Post-Doc and you want to stay in academia? You want to get some information on how to prepare best for the next steps on the career ladder? Or are you just unsure what your next step may look like? Do you have any other questions regarding your academic life?

Then join us at the YAMM 2016. Discuss with our experts from various career stages about their experience. Gain important insights in academic application procedures and get tips for your upcoming application. Find out how our experts reconcile their work and family life and what they think about characteristic numbers of academic track records. The whole discussion will take place in a relaxed “World Café” setting. Food and drinks will be supplied.

Note that the number of participants is limited to 50 persons. For the attendance of the event we raise a registration fee of 5 €.

organised by GAMM Juniors

Young Researchers Minisymposia

Studienangebot

Uni erleben

Studienstart

Studierendenleben

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Studienangebot

Studienorganisation

Studieren ist mehr

Information und Beratung

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Berufseinstieg

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88th GAMM Annual Meeting

Program

Abstracts

Committees 2017

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