凝縮における逆温度こう配現象の否定的検証 : 分子動力学法による界面境界条件の適用

概要

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The direct simulation Monte Carlo (DSMC) method is used to examine the inverted temperature profile in condensation. In order to analyze the temperature jump at a liquid-vapor interface, new boundary conditions obtained by the molecular dynamics study are applied for one dimensional condensing flow of argon. Here, condensation/evaporation coefficient is considered to be a function of surface-normal component of kinetic energy of molecules, and the velocity distributions for evaporated and reflected molecules are given by modified Maxwellian using the condensation/evaporation coefficient. The results show that the temperature decreases gradually as approaching the condensing surface and that the inverted temperature profile disappears for the new boundary conditions. It is also found that the dependence of condensation/evaporation coefficient on kinetic energy plays an important role in the temperature profiles in the vicinity of condensing surface.
一般社団法人日本機械学会の論文
1998-02-25