Доступ предоставлен для: Guest
TSFP DL Home Архив Исполнительный Комитет

APPLICATION OF URANS TURBULENCE CLOSURE MODELS TO COMPLEX FLOWS SUBJECTED TO ELECTROMAGNETIC AND OTHER BODY FORCES

D. R. Wilson
School of Mechanical, Aerospace and Civil Engineering The University of Manchester, Manchester, M13 9PL, UK

Timothy J. Craft
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering, The University of Manchester, PO Box 88, Manchester M13 9PL, UK

Hector Iacovides
Turbulence Mechanics Group, School of Mechanical, Aerospace and Civil Engineering. The University of Manchester, Manchester M13 9PL, U.K.

Аннотация

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.