开孔泡沫金属传热和流动特性

In recent years, the application of open鄄cell metal foams in heat dissipation equipment has gradually become a research hotspot. Its structure is generally simplified in numerical simulation due to its complex and disordered structure. At present, there are a variety of simplified models, but the simplified models suitable for the simulation of heat transfer and flow characteristics are not clear. In addition, the structural parameters of metal foam suitable for heat dissipation need to be studied in detail. Therefore, five simplified 3鄄D models of open鄄cell metal foams are established, and the heat transfer and flow characteristics are compared to conclude that Gibson鄄Ashby model can describe the heat transfer and flow characteristics of open鄄cell metal foams more accurately. On this basis, Gibson鄄Ashby model is used to analyze the heat transfer and flow performance of open鄄cell metal foams. The results show that the comprehensive performance j / f ¹ / ³ of open鄄cell metal foam fins with 90% porosity and 30PPI pore density is the best. Comparing the open鄄cell metal foam fins with porosity of 90% and pore density of 30PPI with the flat fin, the results show that the heat transfer effect of open鄄cell metal foam fins is more than two times that of the flat fin, and its comprehensive performance is better than that of the flat fin. The research results can provide reference for the application and design of open鄄cell metal foams in heat transfer field.