Recovery Heat Flux at Superfluid Helium Film Boiling on the Cylindrical Heaters in Different Conditions

The set of two equations for determination of the recovery heat flux density is presented. Pressure distribution in the liquid determined by the hydrostatic difference, Laplace pressure jump on the vapor-liquid interface, the non-equilibrium effects in the vapor film is taken into account in one of them. The correct correlation for the normal component of momentum flux density tensor obtained on the base of two-fluid model was used at deriving this equation. Second equation describes heat transfer in helium II by the Gorter-Mellink semi-empirical theory. Various simplifications and special cases are analyzed. Experimental data on the boiling of superfluid helium under various conditions are interpreted on the base formulated mathematical model. Good enough agreement between the calculated and experimental results takes place.