Flow boiling heat transfer and pressure drop characteristics in expanding silicon microgap heat sink

摘要: Abstract The present flow boiling experiments are performed for deionized water mass fluxes, G = 400–1000 kg/m2 s, imposed effective heat flux q eff ″ ranging from 0 W/cm2 to 80 W/cm2 three different microgap configurations having same inlet depth 200 μm and gradually increasing exit 200 μm, 300 μm 460 μm explore expanding effect on transfer pressure drop performances. High speed visualizations conducted simultaneously along with the bubble behavior in sink. results of this study show that maintains a more uniform wall temperature than straight sink also delays dryout phase. In addition, performs best both performances among all configurations.