HEAT TRANSFER FROM COMPOSITE MATERIAL EXTENDED SURFACES HEAT SINK

Abstract

The heat transfer from two dimensional unsteady state of composite straight extended surfaces heat sink of different materials is analyzed here by using finite element technique. Galerkin method with linear rectangular elements is used in the present analysis. The effects of conductivity ratio (KR) on the efficiency and the effectiveness of the heat sink are examined ( the efficiency & the effectiveness of the heat sink are increased with increasing of (KR), also the present and non-present of the heat generation through the heat sink is discussed. The effect of the conductivity ratio on the steady state time is discussed here. It can be noted that the increasing of the conductivity ratio (from less than one to greater than one) will reduce the time for reach the steady sate.