Stability of the Liquid-Vapor Interface under the Combined Influence of Normal Vibrations and an Electric Field  

作　　者：Vladimir Konovalov 

机构地区：[1]Institute of Continuous Media Mechanics,The Ural Branch of RAS,Perm,614000,Russia

出　　处：《Fluid Dynamics & Materials Processing》2024年第11期2541-2563,共23页流体力学与材料加工（英文）

基　　金：supported by the Ministry of Science and High Education of Russia(Theme No.121031700169-1).

摘　　要：The regime of horizontal subcooled film boiling is characterized by the formation of a thin layer of vapor coveringthe surface of a flat horizontal heater. Based on the equations of motion of a viscous incompressible fluid and theequation of heat transfer, the stability of such a vapor film is investigated. The influence of the modulation of thegravity field caused by vertical vibrations of the heater of finite frequency, as well as a constant electric fieldapplied normal to the surface of the heater, is taken into account. It is shown that in the case of a thick vaporfilm, the phase transition has a little effect on the thresholds for the occurrence of parametric instability in thesystem and its transformation into the most dangerous one. At the same time, the electric field contributes toan increase in these thresholds. It was found that the effect of vibrations on the stabilization of non-parametricinstability in the system is possible only in a narrow region of the parameter space where long-wave damped disturbances exist and consists of reducing the critical heat flux of stabilization. A vapor film stabilized in this waycan be destroyed due to the development of parametric instability. In contrast to the case of a thick vapor layer,the threshold for the onset of parametric instability for thin films largely depends on the value of subcooling in thesystem. In addition, this threshold decreases with increasing electric field strength. For a vapor film ten micronsthick, the instability threshold can be reduced by a factor of three or more by applying an electric field of aboutthree million volts per meter.

关 键 词：Film boiling SUBCOOLING phase transition vibrations electricfield 

分 类 号：O17[理学—数学]