NATURAL CONVECTION HEAT TRANSFER FLOW VISUALIZATION OF PERFORATED FIN ARRAYS BY CFD SIMULATION

Abstract

The present paper reports, the validation of results of modeling and simulation in CFD by experiment on the fluid flow and heat transfer characteristics of a fin arrays with lateral circular perforation and its external dimensionally equivalent solid fin arrays equipped on horizontal flat surface a problem of natural convection. The simulation is carried out using the fluid flow (CFX) workbench of ANSYS 12.0. In this study, results shows that formation of the stagnant layer around the solid fin array which slowdowns the heat dissipation rate. Increase in the fluid flow movement around the fin results increase in the heat dissipation rate. It can be achieved by adding perforation to the fins. Natural convection is a buoyancy driven phenomenon; the state of the art of CFX was used to carry the study of fluid flow separation and velocity field over a fin array. New designed perforated fins have an improvement in average Nusselt number, over its external dimensionally equivalent solid fin arrays.