カリウムの凝縮における蒸気分子の挙動

概要

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The field accompanied by evaporation and condensation of alkali metals is not correctly described by the analysis using the continuum equations, because discontinuity of physical quantities such as temperature at the vapor-liquid interface occurs in the phase change process. We apply the direct-simulation Monte Carlo method, which is based on molecular kinetic theory, to the condensation problem of potassium. The simulation results are found to be in excellent agreement with experimental results which were obtained by two of the authors, when the condensation and evaporation coefficients are set as unity. In addition to this, we investigate the vapor molecule behavior in the vicinity of the vapor-liquid interface from the standpoint of the velocity distribution function of vapor molecules, and clarify the physical necessity of the occurrence of negative temperature gradients at the interface.
一般社団法人日本機械学会の論文
1994-05-25