MHD turbulence in a channel with spanwise field |
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| Authors: | Dmitry Krasnov Oleg Zikanov Joerg Schumacher Thomas Boeck |
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| Institution: | 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 |
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| Abstract: | 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. The main effect of the magnetic field is the suppression of turbulent velocity fluctuations and momentum transfer in the wall–normal direction. Comparing the results from direct and large–edddy simulations we show that the dynamic Smagorinsky model accurately reproduces the flow transformation. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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