INFLUENCE OF MICROGRAVITATION ON VAPOR FILM COLLAPSE NEAR A WIRE IMMERSED IN SUPERFLUID HELIUM

The processes of heat and mass transfer occurring in the course of vapor fi lm collapse on the surface of a wire heater immersed in a volume of superfl uid helium are analyzed. Application of the results of a molecular-kinetic analysis for calculating the intensity of vapor condensation on the interphase surface allows one to obtain the needed relation for calculating the motion of the interphase surface to be used in turn in solving the Rayleigh equation with account for surface tension. The calculation results at a different level of microgravitation are compared with experimental data. An analysis of the infl uence of various constituents of the pressure difference in the fl uid on the speed and time of vapor fi lm collapse is carried out
   
Author:  Yu. Yu. Puzina and A. P. Kryukov
Keywords:  helium-II, vapor fi lm, interphase surface, condensation, collapse, microgravitation, molecular-kinetic theory
Page:  1582