Numerical Investigation of Fluid Flow and Heat Transfer in High-Temperature Wavy Microchannels with Different Shaped Fins Cooled by Liquid Metal

The microchannel heat sink has been recognized as an excellent solution in high-density flux devices for its high efficiency removal with limited spaces; however, the most effective structure of microchannels dissipation is still unknown. In this study, fluid flow and transfer high-temperature wavy various shaped fins, including bare channel, channel circular, square, diamond-shaped are numerically investigated. liquid metal-cooled characteristics proposed compared that smooth straight respect to pressure drop, average Nusselt number, overall performance factor. results indicate fin shape have a significant effect on performance. Heat augmentation observed channels, especially coupled different fins; large penalty drops also found these channels. fins yield best but worst pumping performance, followed by square-, circular-shaped fins. When Re number increases from 117 410, Nu 61.7% diamond while ∆p much 7.5 times.