On prediction of turbulent convective heat transfer in rib-roughened rectangular cooling ducts

摘要

A numerical investigation has been carried out to predic local and mean thermal-hydraulic characteristics in rib-roughened ducts. The Navier-Stokes and energy equations, and a low-Re number k-#epsilon# turbuelnce model are solved. Two methods for determination of the Reynolds stresses, eddy viscosity model (EVM) and explicit algebraic stress model (EASM), are used. the numerical solution procedure uses a collocated grid, and the pressure-velocity coupling is handled by the SIMPLEC algorithm. Teh computations are performed with the assumption of fully developed periodic conditions.