Flow and Heat Transfer Characteristics Across Circular Shaped Micro Pin-fin Heat Sinks With Different Porosity
英文摘要
In this paper, by utilizing CFD, numerical simulations and analyses were used to research the flow and heat transfer characteristic in different porosity staggered circular shaped micro pin-fin heat sinks whose hydraulic diameter is 200 μm.The results indicate that, with the increase of Reynolds number, vortexes with different structures are found in the pin fins wake zone.Under different porosity, the size and shape of vortexes are different due to the influence of pin-fins at downstream.The influence on Nusselt number of the heat sinks caused by the change of heat flux is different under different porosity.There is barely influence on Nusselt number under smaller porosity when heat flux changes, while under larger porosity, the Nusselt number increases with the increase of heat flux.
翻译关键词
heat transfer characteristic flow distribution analysis micro pin-fin numerical simulation
