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Thermophysics and Aeromechanics

2003 year, number 4

The effect of boundary conditions on dynamics of film boiling site development

A. N. Pavlenko, I. P. Starodubtseva, and A. M. Matsekh
Kutateladze Institute of Thermophysics SB RAS, Novosibirsk, Russia
Pages: 591–606

Abstract

Results of numerical simulation of film boiling site evolution on the heat-releasing surface are presented. Boundary conditions were analyzed within the front of boiling regime change. While describing the dynamics of the front of boiling regime change by the simulation model, the non-stationary character of heat transfer within different zones at the front of regime change was taken into account. The influence of frequency, amplitude, and linear size of the zone of pulsation intensity of heat transfer in the areas of nucleate and transitional boiling on the average propagation velocity of film boiling is shown quantitatively for the first time. Data on thermal stability and dynamics of succession development for the local film boiling sites were obtained within the framework of simulation model. It is shown that the critical size of