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Application of URANS turbulence closure models to complex flows subjected to electromagnetic and other body forces
No full textThis paper considers the application of the Reynolds Averaged Navier-Stokes (RANS) approach to two types of electromagnetically influenced turbulent flows. The first is a fully-developed 2D channel flow with a magnetic field imposed in either the wall-normal direction (Hartmann Flow), or in the streamwise direction. The second is that of Rayleigh-Benard convection with a vertical magnetic field imposed. The turbulence is represented by a low-Re k-epsilon model which is tested with and without electromagnetic modifcations proposed by Kenjeres and Hanjalic (2000). The results show tha modifications lead to a dramatic reorganisation of the coherent structures in Rayleigh-Benard convection as the magnetic field strength is increased, but over-predict the damping of the turbulent shear stress in a simple channel flow
