Direct numerical simulation and modelling of spanwise rotating channel flow with heat transfer

Abstract

Rotating flows with heat transfer are encountered in many applications relevant to engineering, such as in turbomachinery. However, it is no easy matter to make fine measurements of rotating flows with heat transfer. As an alternative, a direct numerical simulation (DNS) has been utilized to examine a canonical rotating flow, and a turbulence model has been used for predicting realistic rotating flows. In this study, to explore the turbulent transport mechanism of rotating shear flows with heat transfer, we have conducted the DNS of fully developed turbulent spanwise rotating channel flows with heat transfer at various rotation numbers. Then, using the DNS results, we have assessed the existing linear and nonlinear two-equation heat-transfer models to understand the performance of the models in rotating channel flows with heat transfer. Finally, we have reconstructed a two-equation turbulence model to predict spanwise rotating channel flows with heat transfer.

This article is a modified version of the original article from the Proceedings of the 5th International Symposium on Engineering Turbulence Modelling and Measurements, Mallorca, 16-18 September 2002, which appeared in ‘Engineering Turbulence Modelling Measurements 5’, Elsevier Science, ISBN 0-08-044114-9, ed W Rodi and N Fueyo.