earticle

영어

An algebraic model for turbulent heat fluxes which is originally suggested by Suga & Abe is modified on the basis of the elliptic blending equation. In order to satisfy the heat transfer characteristics of near-wall region and the flow center region far away from the wall, the model coefficients of the algebraic heat flux model are modified by using the solution of the elliptic blending equation. The predictions of turbulent heat transfer in a plane channel flow have been carried out with constant wall heat flux and constant wall temperature difference boundary conditions respectively. Also, the predictions are performed at various Prandtl numbers to test the applicability of the model. The prediction results show that the distributions of the turbulent heat fluxes and mean temperature are well captured by the modified algebraic heat flux model.