• V. P. Gaikwad
• S. S. Mohite

Enhancement of thermal performance of microchannel heat sink (MCHS) by introducing pins in the channel is the main objective of this study. A single microchannel with and without pins is studied for different flow and thermal conditions. The pins are introduced from the top cover instead of the conventional method of pin-fin protruding from the base of heat sink as it drastically reduces the fabrication cost. Pins of different heights are numerically analyzed. Of the different configurations, enhanced MCHS with pin height of 1.2 mm give the best results. This is due to the fact that as clearance between base and pins increase, there is an accelerated flow in the clearance region producing more mixing of fluid and higher heat transfer performance. Effects of fluid bypassing the pins become dominant when the clearance region is further increased, resulting in lower heat transfer performance. The introduction of pin increases the pressure drop; it is highest for full height pin and decreases with pin height. The best configuration is then studied for different flow rates. The thermal performance increases with increase in flow rate, the temperature gradient decreases by 33% for Reynolds number of 618 but at an increased pressure drop of 100% than the conventional MCHS. A correlation showing the effect of pin height on Nusselt number is proposed.

microchannel, forced convection, temperature gradient, pressure drop

"Numerical Analysis Of Thermo-Hydraulic Performance In Pin Enhanced Microchannel Heat Sink", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.517-524, May-2019, Available :http://www.jetir.org/papers/JETIR1905N79.pdf

"Numerical Analysis Of Thermo-Hydraulic Performance In Pin Enhanced Microchannel Heat Sink", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp517-524, May-2019, Available at : http://www.jetir.org/papers/JETIR1905N79.pdf