An Experimental Study on Heat Transfer Enhancement of Flat Plates Using Dimples

Abstract

Dimples play a very important role in heat transfer enhancement of electronic cooling systems. In the current paper, the fluid flow and heat transfer characteristics of spherical dimples at different angle of orientation from the centre with apex facing the inlet were investigated. The experiment was carried out for laminar Natural convection conditions with air as a working fluid. The overall Nusselt numbers and heat transfer coefficient at different orientation angle of dimples were obtained. From the obtained results, it was observed that the Nusselt numbers and heat transfer coefficient increases with decrease in the orientation angle of dimples.

Cooling Effect Efficiency Prediction of Aluminum Dimples Block using DOE Technique

“…Dimpled profile surface has a much better heat transfer coefficients of about 26 % as compared to flat surface with staggered arrangement, whereas for inline arrangement of dimple, the heat transfer coefficients are about 25% as compared to flat surface [14]. At low angle of dimple orientation, the heat transfer coefficient yields higher values [19]. The heat dissipation will enhance when the coefficient of heat transfer is higher.…”

Experimental Comparison of Heat Transfer by Natural Convection from Plain Vertical Plate and Vertical Plate with Inline Dimples

“…al. [6] studied the fluid flow and heat transfer characteristics of spherical dimples at different angle of orientation from the centre with apex facing the inlet were investigated. The experiment was carried out for laminar Natural convection conditions with air as a working fluid.…”