INHALTE
Publikationen
Plasma Instabilities and MHD turbulence
- J. Schumacher and B. Kliem, Dynamic current sheets with anomalous resistivity, Phys. Plasmas 3, 4703 (1996).
- J. Schumacher and B. Kliem, Transient fast reconnection in dynamic current sheets with anomalous resistivity, Adv. Space Res. 19, 1797 (1997).
- J. Schumacher and B. Kliem, Coalescence instability of magnetic islands including anomalous resistivity, Phys. Plasmas 4, 3533 (1997).
- N. Seehafer and J. Schumacher, Squire's theorem for the magnetohydrodynamic sheet pinch, Phys. Plasmas 4, 4447 (1997).
- B. Kliem, J. Schumacher, and D. Shklyar,Test particle acceleration in 2D current sheets undergoing dynamical phases of reconnection, Adv. Space Res. 21, 563 (1998).
- N. Seehafer and J. Schumacher, Resistivity profile and instability of the plane sheet pinch, Phys. Plasmas 5, 2363 (1998).
- J. Schumacher and B. Eckhardt, Magnetic field correlations in kinematic two-dimensional magnetohydrodynamic turbulence, Phys. Plasmas 6, 3477 (1999).
- J. Schumacher, B. Kliem, and N. Seehafer, Three-dimensional magnetic reconnection in neutral current sheets, Phys. Plasmas 7, 108 (2000).
- J. Schumacher and N. Seehafer , Bifurcation analysis of the plane sheet pinch, Phys. Rev. E 61, 2695 (2000).
- D. Krasnov, O. Zikanov, J. Schumacher, and T. Boeck, MHD turbulence in a channel with spanwise magnetic field, Phys. Fluids 20, 095105 (2008).
- D. Krasnov, O. Zikanov, J. Schumacher, and T. Boeck, Energy dissipation rates in low-Re_m MHD turbulence with mean shear: Results for channel flow with spanwise field, Magnetohydrodynamics 45, 155 (2009).
- M. Kirpo, S. Tympel, T. Boeck, D. Krasnov, and A. Thess, Electromagnetic drag on a magnetic dipole near a translating conducting bar, J. Appl. Phys. 109, 113921 (2011).
Free Surfaces and Particle Clustering
- W. I. Goldburg, J. R. Cressman, Z. Vörös, B. Eckhardt, and J. Schumacher, Turbulence in a free surface, Phys. Rev. E 63, 065303(R) (2001).
- B. Eckhardt and J. Schumacher, Turbulence and passive scalar transport in a free-slip surface, Phys. Rev E 64, 016314 (2001).
- J. Schumacher and B. Eckhardt, Clustering of Lagrangian tracers in free-surface flows, Phys. Rev. E 66, 017303 (2002).
- J. Schumacher, Probing surface flows with Lagrangian tracers, Prog. Theor. Phys. Supp. 150, 255 (2003).
- J. R. Cressman, W. I. Goldburg, and J. Schumacher, Dispersion of tracer particles in a compressible flow, Europhys. Lett. 66, 219 (2004).
- J. R. Cressman, J. Davoudi, W. I. Goldburg, and J. Schumacher, Eulerian and Lagrangian studies in surface flow turbulence, New J. Phys. 6, 53 (2004).
- G. Boffetta, J. Davoudi, B. Eckhardt, and J. Schumacher, Lagrangian tracers on a surface flow: the role of time correlations, Phys. Rev. Lett. 93, 134501 (2004).
Mixing and Convection
- B. Eckhardt and J. Schumacher, Structure function of passive scalars in two-dimensional turbulence, Phys. Rev E 60, 4185 (1999).
- J. Schumacher, K. R. Sreenivasan, and P. K. Yeung, Schmidt number dependence of derivatve moments for quasistatic straining motion, J. Fluid Mech. 479, 221 (2003).
- J. Schumacher and K. R. Sreenivasan, Geometric aspects of the passive scalar mixing at high Schmidt number, Phys. Rev. Lett. 91, 174501 (2003).
- J. Schumacher, Scalar gradient fields by geometric measure theory, Phys. Rev. E 69, 047301 (2004).
- K. G. Aivalis, S. Kurien, J. Schumacher, and K. R. Sreenivasan, Sign-symmetry of temperature structure functions, Phys. Rev. E 69, 066315 (2004).
- J. Schumacher, K. R. Sreenivasan, and P. K. Yeung, Very fine structures in scalar mixing, J. Fluid Mech. 531, 113 (2005).
- J. Schumacher and K. R. Sreenivasan, Statistics and geometry of passive scalar fields in turbulence, Phys. Fluids 17, 125107 (2005).
- J. Schumacher, H. Zilken, B. Eckhardt, and K. R. Sreenivasan, Scalar dissipation fronts in high-Schmidt number mixing (Gallery of Nonlinear Images), Chaos 15, 041105 (2005).
- D. Kushnir, J. Schumacher, and A. Brandt, Geometry of intensive scalar dissipation events in turbulence, Phys. Rev. Lett. 97, 124502 (2006).
- J. Schumacher, Lagrangian dispersion and heat transport in convective turbulence, Phys. Rev. Lett. 100, 134502 (2008).
- J. Schumacher, Turbulent convection in large-aspect-ratio cells, inSiDe-Innovatives Supercomputing in Deutschland 6(1), 14 (2008)
- M. S. Emran and J. Schumacher, Fine-scale statistics of temperature and its derivatives in convective turbulence, J. Fluid Mech. 611, 13 (2008).
- J. Schumacher, Lagrangian studies in convective turbulence, Phys. Rev. E 79, 056301 (2009).
- O. Pauluis and J. Schumacher, Idealized moist Rayleigh-Benard convection with a piecewise linear equation of state, Comm. Math. Sci. 8, 295 (2010).
- J. Schumacher and O. Pauluis, Buoyancy statistics in moist turbulent Rayleigh-Benard convection, J. Fluid Mech. 648, 509 (2010).
- K. R. Sreenivasan and J. Schumacher, Lagrangian views on turbulent mixing of passive scalars, Phil. Trans. Roy. Soc. A 368, 1561 (2010).
- J. Bailon-Cuba, M. S. Emran, and J. Schumacher, Aspect ratio dependence of heat transfer and large-scale flow in turbulent convection, J. Fluid Mech. 655, 152 (2010).
- M. S. Emran and J. Schumacher, Lagrangian tracer dynamics in a closed cylindrical turbulent convection cell, Phys. Rev. E 82, 016303 (2010).
- T. Weidauer, O. Pauluis, and J. Schumacher, Cloud patterns and mixing properties in shallow moist Rayleigh-Benard convection, New J. Phys. 12, 105002 (2010).
- J. Bailon-Cuba and J. Schumacher, Low-dimensional model of turbulent Rayleigh-Benard convection in a Cartesian cell with square domain, Phys. Fluids 23, 077101 (2011).
- O. Pauluis and J. Schumacher, Self-aggregation of clouds in conditionally unstable moist convection, Proc. Nat. Acad. Sci. 108, 12623 (2011).
- T. Weidauer, O. Pauluis, and J. Schumacher, Rayleigh-Benard convection with phase changes in a Galerkin model, Phys. Rev. E 84, 046303 (2011).
- B. Kumar, J. Schumacher, and R. A. Shaw, Cloud microphysical effects of turbulent mixing and entrainment, Theor. Comput. Fluid Dyn., in press (2012).
- N. Shi, M. S. Emran, and J. Schumacher, Boundary layer structure in turbulent Rayleigh-Benard convection, J. Fluid Mech., in press (2012).
Fluid Turbulence
- J. Schumacher and B. Eckhardt, On statistically stationary homogeneous shear turbulence, Europhys. Lett. 52, 627 (2000).
- J. Schumacher and B. Eckhardt, Evolution of turbulent spots in plane shear flow, Phys. Rev. E 63, 046307 (2001).
- J. Schumacher, Derivative moments in stationary homogeneous shear turbulence, J. Fluid Mech. 441, 109 (2001).
- J. Schumacher, K. R. Sreenivasan, and P. K. Yeung, Derivative moments in turbulent shear flows, Phys. Fluids 15, 84 (2003).
- C. R. Doering, B. Eckhardt, and J. Schumacher, Energy dissipation in body-forced plane shear flow, J. Fluid Mech. 494, 275 (2003).
- J. Schumacher and B. Eckhardt, Fluctuations of the energy injection rate in a shear flow, Physica D 187, 370 (2004).
- J. Schumacher, Relation between shear parameter and Reynolds number in statistically stationary turbulent shear flows, Phys. Fluids 16, 3094 (2004).
- A. Jachens, J. Schumacher, B. Eckhardt, K. Knobloch, and H.H. Fernholz, Asymmetry of temporal cross-correlations in turbulent shear flows, J. Fluid Mech. 547, 55 (2006).
- J. C. Bowman, C. R. Doering, B. Eckhardt, J. Davoudi, M. Roberts, and J. Schumacher, Links between dissipation, intermittency, and helicity in the GOY model revisited, Physica D 218, 1 (2006).
- J. Schumacher, K. R. Sreenivasan, and V. Yakhot, Asymptotic Exponents from Low-Reynolds number flows, New J. Phys. 9, 89 (2007).
- J. Schumacher, Sub-Kolmogorov-scale fluctuations in fluid turbulence, Europhys. Lett. 80, 54001 (2007).
- P. E. Hamlington, J. Schumacher, and W. J. A. Dahm, Local and nonlocal strain rate and vorticity alignment in turbulent flows, Phys. Rev. E 77, 026303 (2008).
- J. Schumacher, M. Boltes, H. Zilken, M.-A. Hermanns, B. Eckhardt, and C. R. Doering, Enstrophy amplification events in three-dimensional turbulence (Gallery of Nonlinear Images), Chaos 18, 041103 (2008).
- P. E. Hamlington, J. Schumacher, and W. J. A. Dahm, Direct assessment of vorticity alignment with local and nonlocal strain rates in turbulent flows, Phys. Fluids 20, 111703 (2008).
- S. C. Bailey, M. Hultmark, J. Schumacher, V. Yakhot, and A. J. Smits, Measurement of local dissipation scales in turbulent pipe flow, Phys. Rev. Lett. 103, 014502 (2009).
- B. Brzek, J. Bailon-Cuba, S. Leonardi, and L. Castillo, Theoretical evaluation of the Reynolds shear stress and flow parameters in transitionally rough turbulent boundary layers, J. Turb. 10, N5 (2009).
- J. Bailon-Cuba, S. Leonardi, and L. Castillo, Turbulent channel flow with 2D wedges of random height on one wall, Int. J. Heat Fluid Flow 30, 1007 (2009).
- T. Boeck, D. Krasnov, and J. Schumacher, Statistics in wall-bounded shear flow turbulence, Physica D 239, 1258 (2010).
- J. Schumacher, B. Eckhardt, and C. R. Doering, Extreme vorticity growth in Navier-Stokes turbulence, Phys. Lett. A 374, 861 (2010).
- P. E. Hamlington, D. Krasnov, T. Boeck, and J. Schumacher, Statistics of the energy dissipation rate and local enstrophy in turbulent channel flow, Physica D 241, 169 (2012).
- P. E. Hamlington, D. Krasnov, T. Boeck, and J. Schumacher, Local dissipation scales and energy dissipation-rate moments in channel flow, J. Fluid Mech., in press (2012).
Complex Fluids
- B. Eckhardt, J. Kronjäger, and J. Schumacher, Stretching of polymers in a turbulent environment, Comp. Phys. Comm. 147, 538 (2002).
- J. Davoudi and J. Schumacher, Stretching of polymers around the Kolmogorov scale in a turbulent shear flow, Phys. Fluids 18, 025103 (2006).
- C. R. Doering, B. Eckhardt, and J. Schumacher, Failure of energy stability in Oldroyd-B fluids at arbitrarily low Reynolds numbers, J. Non-Newtonian Fluid Mech. 135, 92 (2006).
- T. Peters and J. Schumacher, Two-way coupling of FENE dumbbells with a turbulent shear flow, Phys. Fluids 19, 065109 (2007).
- J. Lee, B. Dünweg, and J. Schumacher, Multiscale modelling strategy using the lattice Boltzmann method for polymer dynamics in a turbulent flow, Comp. Math. Appl. 59, 2374 (2010)