S0507-1-1 ナノ液滴の蒸発・凝縮に関する非平衡分子動力学シミュレーション([S0507-1]気泡力学と界面現象(1))

概要

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Nonequilibrium molecular dynamics simulation is carried out to study weak condensation of argon vapor into its nanodroplet. Temperature of the nanodroplet is kept at 90 K by using the velocity scaling method. The nanodroplet grows steadily ranging from about 3.3 to 3.4 nm in the radius R_m which is defined as the radius of the center of transition layer in density profile. The mass fluxes at the vapor-nanodroplet interface are investigated and condensation coefficient of the nanodroplet is successfully determined. As a result, the condensation coefficient is almost equal to the evaporation coefficient obtained by our previous study. The rate of change of R_m can be predicted by the mass fluxes and evaporation/condensation coefficients within about 16 percent error.
2010-09-04