Noncontact electromagnetic flow measurement in electrolytes. - In: 23rd International Congress of Theoretical and Applied Mechanics, 2012, FM11-005, insges. 2 S.
Lorentz force velocimetry (LFV) is a noncontact electromagnetic flow measurement technique that is currently successfully applied for velocity measurements in liquid metals both in laboratory experiments and industry. However, up to now the application of LFV was restricted to conducting fluids with electrical conductivities of the order of 106 S/m such as are encountered in liquid metals. Here we demonstrate that LFV can be successfully extended to poorly conducting fluids (electrolytes) by using high-resolution force measurements.
Entwicklung eines Laserstrahlpolierverfahrens für Quarzglasoberflächen
[Online-Ausg.]. - Ilmenau : Universitätsverlag Ilmenau, 2012. - Online-Ressource (PDF-Datei: 200 S., 6,09 MB). - (Werkstofftechnik aktuell ; 8) : Ilmenau, Techn. Univ., Diss., 2012
Parallel als Druckausg. erschienen
Ziel der Laserstrahlpolitur ist die schnelle, gleichmäßige, formerhaltende Glättung des Rauheitsprofils einer Quarzglasoberfläche. Der Laser wirkt dabei geometrieunabhängig, in der Art eines schnellen Subaperturwerkzeuges. Verschieden spanend bearbeitet Proben werden mittels Laserstrahlung poliert, wobei die Prozesseinflussgrößen, die Wechselwirkungen zwischen Laserstrahlung und Quarzglas sowie die Auswertung der Ergebnisse hinsichtlich Oberflächenqualität und Beeinflussung von Spannungen bzw. mechanischen Eigenschaften, die Untersuchungen und die Entwicklung eines industriell einsetzbaren Laserstrahlpolierverfahrens unterstützen. Experimentplanung, -durchführung und -auswertung erfolgen unter Anwendung statistischer Methoden. Die Temperatur wird während der Politur mit Pyrometer und Wärmebildkamera überwacht. Die Einsatzgebiete des Verfahrens liegen u.a. beim Polieren von 2D- und 2½D Bauteilen, Werkzeugformeinsätzen (Kunststoffverarbeitung) und in Teilbereichen optischer Komponenten.
http://www.db-thueringen.de/servlets/DocumentServlet?id=20857
Migration of paramagnetic ions in glass melts under influence of a magnetic field. - In: Journal of iron and steel research international, ISSN 1006-706X, Bd. 19.2012, Suppl. 1-2, S. 1068-1071
Lorentz force velocimetry for poorly conducting fluids - development and validation of a novel flow rate measurement device. - In: Journal of iron and steel research international, ISSN 1006-706X, Bd. 19.2012, Suppl. 1-2, S. 613-616
Numerical simulation of induced alterations of flow patterns within glass melts using external Lorentz forces. - In: Journal of iron and steel research international, ISSN 1006-706X, Bd. 19.2012, Suppl. 1-1, S. 471-474
Assembling and test of a Halbach array magnet system for Lorentz force velocimetry in electrolytes. - In: Journal of iron and steel research international, ISSN 1006-706X, Bd. 19.2012, Suppl. 1-1, S. 145-148
Electromagnetic processing of materials at the Department Inorganic-Nonmetallic Materials. - In: Journal of iron and steel research international, ISSN 1006-706X, Bd. 19.2012, Suppl. 1-1, S. 135-140
This paper illustrates an overview of current research activities in the working group "Electromagnetic Processing of Materials" of the department Inorganic-Nonmetallic Materials. These are "Electromagnetic module to flow impact in special melting plants for the production of high-tech glasses", "Numerical study of EM controlled flow in crystallizers of inorganic materials", "Design, test and optimization of sophisticated magnet systems for Lorentz force velocimetry in electrially low conducting fluids", "Magnetic ion manipulation in glass melts with Kelvin force", "Electromechanical dry fine milling of raw materials" and "Synthesis, characterization and application of Titatium doped hexaferrites". The primary results are presented here.
Optimization of NdFeB magnet arrays for improvement of Lorentz force velocimetry. - In: IEEE transactions on magnetics, ISSN 1941-0069, Bd. 48 (2012), 11, S. 2925-2928
This paper presents the design and optimization process of magnet systems for the application in so called "Lorentz Force Velocimetry". Here weight limitations, physical principle and systematical specifications give rise to a complete new combination of restrictions for the magnetic system design. Beneath the Lorentz force velocimetry background, the paper presents the idea using halbach arrays in combination with cladding technique to improve the currently used magnet systems significant. The magnet systems are geometrically optimized onto the physical principle using finite element simulations. These optimizations are presented on a state of the art reference design for Lorentz force velocimetry in electrolytic flows.
http://dx.doi.org/10.1109/TMAG.2012.2196500
Einfluss magnetischer Gradientenkräfte auf Fluide mit paramagnetischen Ionen. - In: Workshop Elektroprozesstechnik, (2012), 15, insges. 1 S.
A novel electromagnetic mixer for the glass melt homogenization - evaluation with a numerical and physical model. - In: Workshop Elektroprozesstechnik, (2012), 14, insges. 8 S.