Heat flux into superfluid helium through an interphase boundary

The problem of temperature and pressure distribution in He 2 layer, through which heat flux qsub(v) passes, is solved. Investigation is conducted on the base of motion equations for helium containing at random orientated vortex filaments. Interface heat flux qsub(v.) can be determined by means of the obtained relations for the case when He 2 borders on its vapor (film boiling). An analytical expression is obtained for small qsub(v.), regular procedure for calculation of this value is suggested for large qsub(v.). The results can be also applied for determination of critical heat fluxes under the condition that critical superheats are known. The result not discussed earlier, proving that change of pressure in helium layer does not equal hydrostatical but it differs from it by addition necessary for heat flux arrangement is also obtained