Vapor-liquid interfacial dynamics and related liquid nitrogen boiling on perforated plates

摘要

For the switch from terrestrial gravity("lg") tomicro-gravity, we investigate vapor-liquid interfaces and theircontrol in simulation studies and experiments. An improved levelset method is presented for vapor bubble kinematics prediction. Inview of a wide range of vapor bubble dynamics phenomena, ourinitial experimental investigations have focused on film boiling inand near perforated plates immersed in liquid nitrogen. A "zerothorder" approximation of transport based on minimum energyexpenditure rates provides information on mean field vaporthickness. We have measured thermal conductance for the zero netmass flow case and finite mass flow. The data are compared withresults obtained in comparison runs for single solid plates.