Thomas Boeck

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We predict a novel flow regime in liquid metals under the influence of a magnetic field. It is characterized by long periods of nearly steady, two-dimensional flow interrupted by violent three-dimensional bursts. Our prediction has been obtained from direct numerical simulations in a channel geometry at low magnetic Reynolds number and translates into(More)
A. V. Zozulya,1 O. M. Yefanov,1 I. A. Vartanyants,1,* K. Mundboth,2,3 C. Mocuta,2 T. H. Metzger,2 J. Stangl,3 G. Bauer,3 T. Boeck,4 and M. Schmidbauer4 1HASYLAB at DESY, Notkestrasse 85, D-22607 Hamburg, Germany 2ESRF, 6 rue Jules Horowitz, F-38043 Grenoble, France 3Institut für Halbleiterphysik, Johannes Kepler Universität Linz, A-4040 Linz, Austria(More)
Thomas Boeck ∗ 1, Dmitry Krasnov1, Maurice Rossi2, and Oleg Zikanov3 1 Department of Mechanical Engineering, Ilmenau University of Technology, P.O. Box 100565, 98684 Ilmenau, Germany. 2 Institut Jean Le Rond D’Alembert, Université Pierre et Marie Curie, 4 place Jussieu, F-75252 Paris Cedex 05, France. 3 Department of Mechanical Engineering, University of(More)
c © 2006 by John von Neumann Institute for Computing Permission to make digital or hard copies of portions of this work for personal or classroom use is granted provided that the copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise requires prior(More)
We present results of a numerical analysis of Hartmann's historical experiments on flows of mercury in pipes and ducts under the influence of magnetic fields. The computed critical parameters for the laminar-turbulent transition as well as the friction coefficients are in excellent agreement with Hartmann's data. The simulations provide a first detailed(More)
We study turbulent channel flow of an electrically conducting liquid with a homogeneous magnetic field imposed in the spanwise direction. The Lorentz force is modelled using the quasistatic approximation. Direct and large-eddy simulations are performed for hydrodynamic Reynolds numbers Re=10000 and Re=20000 and the Hartmann number varying in a wide range.(More)
The combined effects of buoyancy-driven Rayleigh-Bénard convection (RC) and surface tension-driven Marangoni convection (MC) are studied in a triple-layer configuration which serves as a simplified model for a liquid metal battery (LMB). The three-layer model consists of a liquid metal alloy cathode, a molten salt separation layer, and a liquid metal anode(More)
We present results of a numerical analysis of relaminarization processes in MHD duct and pipe flows. It is motivated by Julius Hartmann’s classical experiments on flows of mercury in pipes and ducts under the influence of magnetic fields. The simulations, conducted both in periodic and non-periodic settings, provide a first detailed view of flow structures(More)
André Thess∗1, Dmitry Krasnov1, Thomas Boeck1, Egbert Zienicke1, Oleg Zikanov2, Pablo Moresco3, and Thierry Alboussière4 1 Department of Mechanical Engineering, Ilmenau University of Technology, P.O. Box 100565, 98684 Ilmenau, Germany 2 Department of Mechanical Engineering, University of Michigan Dearborn, Dearborn MI 48128-1491, USA 3 School of Physics and(More)