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Transitional and turbulent flows driven by a rotating magnetic field

K. Fraňa1,2 , J. Stiller1 , R. Grundmann1

1 Institute for Aerospace Engineering (ILR), Technische Universität Dresden, D-01062 Dresden, Germany
2 Technical University of Liberec, Department of Power Engineering Equipment, Czech Republic

Abstract
The isothermal turbulent flow driven by a rotating magnetic field in a closed cylindrical container was examined numerically by means of direct numerical simulation (DNS) and two-equation turbulence models. We present here a comparative study of the flows, which were computed under axisymmetric and non-axisymmetric assumptions. The deviations between the results obtained are discussed with respect to magnetically induced mean velocities, normal Reynolds stresses and turbulence kinetic energy, in particular. The non-stationary k-ω SST model yielded the best results of all axisymmetric approaches under consideration and can be recommended for engineering applications of stirring processes. In contrast, the standard k-ε model has proved to be too diffusive for the discussed type of flow. Tables 1, Figs 8, Refs 21.

Magnetohydrodynamics 42, No. 2/3, 187-197, 2006 [PDF, 0.67 Mb]

Copyright: Institute of Physics, University of Latvia
Electronic edition ISSN 1574-0579
Printed edition ISSN 0024-998X
DOI: http://doi.org/10.22364/mhd