Thermal performances of different shape porous blocks under an impinging jet

Abstract

A study of the enhancement of the convection heat transfer of a laminar slot jet impinging on a porous block mounted on a heated region was investigated numerically. A numerical method (SIMPLEC) was adopted to solve the governing equations, and a one-equation thermal model with Van Driest's wall function was considered for solving the energy equation. Three different shape porous blocks (rectangle, convex and concave) were studied. The results indicated that the heal transfer is mainly affected by a fluid flowing near the healed region. For a lower porous block, the heat transfer is enhanced by the three types of porous block. However, for a higher porous block, heat transfer is only enhanced by the concave porous block. (C) 1997 Elsevier Science Ltd. All rights reserved.