Numerical investigation of the problem of initiation of autowave transmission from nucleate to film boiling regime by a temperature disturbance

Beginning and development dynamics of film boiling on fuel elements are investigated numerically. At the initial stage the investigation is carried out within the frameworks of simplified one-dimensional model, assuming the tru thermal nature of critical phenomena. In this case, it is assumed, that boiling process occurs at semi-infinite thin heat element, placed in liquid large volume. Calculations were carried out for heater, made of platinum wire with diameter d=0.01 cm; λ=0.895 W/(cmxK); c=0.139 J/(gxK); ρ=21.45 g/cm3. Values of heat transfer coefficients and their dependence on temperature, values of critical thermal fluxes and corresponding temperatures conform to the case of water pool boiling