Figure 2
From: Evaporation coefficient and condensation coefficient of vapor under high gas pressure conditions

(a) Schematic of the present simulation condition (steady vapor/gas–liquid equilibrium). At the center of the system, there is a thin liquid film; (b) Schematic of the molecular fluxes in the vicinity of vapor/gas–liquid interface. We can count the number of molecules using mixture gas and liquid boundaries; \({J}_{{\rm{evap}}}^{\omega }\) denotes the evaporating molecular mass flux for \(\omega \) component molecules, \({J}_{{\rm{ref}}}^{\omega }\) the reflecting molecular mass flux, and \({J}_{{\rm{cond}}}^{\omega }\) the condensing molecular mass flux.