Unsteady Reynolds Averaged Navier-Stokes (URANS) Modelling of Turbulent Flow in a Twin Rectangular Subchannel Geometry

Abstract

This paper presents the results of a numerical research that is carried out to predict the turbulence structure in compound rectangular channels using an Unsteady Reynolds Averaged Navier Stokes (URANS) based turbulence model. The studied geometry is a twin rectangular sub-channel. The simulations are performed for two different mesh structures. The model predicts the expected flow pulsations at the gap and the results have clear periodicity and symmetry. In the current phase of this research, studies are performed to accurately predict the characteristics of the flow structures.