NUMERICAL INVESTIGATION OF FLOW AND HEAT TRANSFER IN MICRO CHANNEL HEAT SINK SUBJECTED TO VARYING HEAT SPOT

Saravanan.V, C.K. Umesh, Doddamani Hithaish

Abstract: Micro-channel heat sinks are known as one of the effective cooling techniques because of its undeniable advantages of smaller physical dimensions and higher heat transfer efficiency. Since most of the electronic cooling systems deals with non-uniform heating, a numerical analysis was carried out for flow inside a micro channel of cross sectional area 489 x100 µm and length of 2 cm with water as the working fluid .The work was carried out for varying heating position namely uniform, upstream, central, downstream and discrete heating of values 50W/cm2 and 70W/cm2. The thermal resistance, pumping power, heat transfer coefficient and surface temperature were studied for different heating condition under laminar regime. The entire work was carried out using Finite volume solver. It was observed t hat the hydrodynamic and thermal behaviour of micro channel heat sink with discrete heating position was better in comparison with other heating position

Keywords: Micro channel, Uniform, upstream, Downstream, Central and Discrete

DOI: https://doi.org/10.15623/ijret.2016.0533003