Abstract
There are several methods for heat transfer enhancement. For example, one can attach various fins on the heat-transfer surface, process the surface roughly, insert twisted tape, and so on. These methods increase the heat-transfer coefficient or area by manufacturing changes to the heat transfer surface. However, it is necessary to consider the reduction of structural strength for attaching of fins on the heat transfer surface. In this study, the effect of heat transfer enhancement by inserting porous metal (metallic wire , foam metal) intermittently was studied and the pressure drop by using porous material was also evaluated.
