Turbulent heat transfer in a backward-facing step flow using a non-linear k-ε Model

Abstract

This work presents numerical results for heat transfer in turbulent flow past a backward-facing step. It is shown that non-linear k-ε models perform better than their linear counterparts when simulations are compared with experimental values. Wall functions are used for simplicity of the simulations. The finite-volume technique is employed for discretizing the transport equation set on a non-orthogonal grid system. The SIMPLE method is used for correcting the pressure field. Results for the reattachment length using the non-linear model are closer to the experimental values when compared with similar calculations using the standard linear closure.