ABSTRACT

This paper considers the application of the Unsteady Reynolds Averaged Navier-Stokes (URANS) approach to two types of electromagnetically influenced turbulent flows. The first is a periodic 2D channel flow with an imposed wall normal magnetic field (Hartmann flow) and the second is that of Rayleigh-Benard convection with a vertical magnetic field imposed. The turbulence is represented by a low-Re k − ε model which is tested with and without electromagnetic modifications proposed by Kenjeres & Hanjalic (2000). The results show the 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.