Numerical Analysis of Mini/Microchannel Heat Transfer Characteristics Using Different Nanofluids
With increasing computing speed and development in electronic technology emphasis should be on making devices smaller, faster and more reliable in quality. This advancement leads to the increment in heat generation; proper heat dissipation is needed from these products in order to keep them in their desired designation and for proper functionality. Mini/Microchannel Heat Sink (MCHS) is the effective way to tackle high heat dissipation in space constraint electronics devices with liquid cooling. In this study, numerical simulation using two-phase mixture model of MCHS has been performed to investigate the heat transfer characteristics. Rectangular shaped MCHS made of Aluminum, mass flow rate (0.1 LPM, 0.15 LPM, 0.2 LPM), Reynolds number range of 184-375 for 1 mm height channel and 247-740 for 0.5 mm height channel, using different types of nanofluid (Al2O3/water, Al2O3-Cu/water) has been considered for this study and results compared with the conventional fluid DI water. Constant heat flux 1000000 (W/m2) condition is applied at bottom base surface of heat sink and insulated all other surfaces for no heat losses. There are nine channels designed on heat sink that can be view from cross sectional view. Heat transfer coefficient, pressure drop and pumping power of MCHS has been investigated in this study. Effect of using nanofluids on developing length over conventional fluid water has been studied.