Numerical investigation of heat transfer and parameter coupling characteristics for Spider web microchannel topological structure

•A bionic spider web microchannel structure design method was proposed.•Structural parameters and flow parameters was investigated.•Parameter coupling characteristics were analyzed and fitting equation was obtained. Highly efficient cooling methods are becoming more urgent with the continuing trend for higher power and further miniaturization of components of aerospace filed. And microchannel heat sinks have been getting more attention in recent researches. Moreover, it can be fully enhanced for the heat transfer capacity of heat sinks by the bionic microchannel structure such as spider web topological structure. In this study, bionic spider web microchannel structure design method was proposed and the structural parameters and flow parameters of bionic spider web microchannel was investigated by using numerical simulation methods. It was found that the effect of the channel center angle of is not obvious for the heat exchange capacity of the spider web microchannels, while the effect for the ratio of the channel width to channel spacing is significant with a maximum temperature difference of about 15 K between the inlet and outlet. Furthermore, the parameter coupling characteristics between the center angles of channel, the average temperature difference, the flow velocity and the ratio of the channel width to channel spacing were analyzed. The fitting equation of the convective heat transfer coefficient was obtained and the overall error of convective heat transfer coefficient calculation is about 10%. The prediction equation could be used for spider web microchannel structure heat exchangers design. And the investigation results could provide the important reference for the thermal management system design of the vehicles.