A NUMERICAL AND EXPERIMENTAL STUDY OF OPTIMAL DISTRIBUTION OF DISCRETE HEAT SOURCE ARRAY COOLED BY NATURAL AND FORCED CONVECTION
This paper deals with the optimal configuration of seven rectangular heat sources of different sizes that mimic
ICs used in electronic components. The heat sources that are made of aluminum with different sizes are
mounted on a bakelite substrate board. The effect of forced and natural convection conjugate heat transfer
for different heat fluxes and flow velocities has been investigated experimentally. It is found that in forced
convection the excess temperature at v = 0.27 m/s are 26.24,35.67 and 43.1°C and that for v = 0.45 m/s are 25.5,33.02 and 42.34°C for the heat flux values of 1500,2000,2500 W/m2 respectively.In case of natural convection for heat flux values of 750,1000 and 1250 W/m2 the excess temperatures are 26.53,35.8 and 43.58°C respectively. The problem is also modeled and simulated using Comsol Multiphysics software. The experimental and numerical results of excess temperatures are in good agreement in both natural and forced convection conjugate heat transfer under laminar flow conditions. Experiments support the existence of an optimum arrangement.