Pool-boiling liquid backflow characteristics in thin porous coatings

Porous coatings are commonly used in electron device heat dissipation for enhancing heat transfer.Reling on working media fast movement because of boiling and condensing inside porous capillary core,heat pipe can realize high-desity and efficient heat transfer.Research on liquid backflow characteristics in thin porous coatings while boiling is significant to improve heat transfer efficient,heat dissipation flux,life.Pool-boiling experiments of different porous coatings in different liquid level were conducted to obtain bubble characteristics and boiling curve of thin porous coatings in high heat flux,and liquid backflow characteristics was analysed with the capillary theory.From the experiments results,liquid backflow mechanism in porous coatings may be understood and influential factors can be studied.Key wrods: porous coatings;pool boiling;bubble characteristics;boiling curve;liquid feedback