Numerical analysis of gas flows condensing on its plane condensed phase on the basis of kinetic theory

Gas flows condensing on its plane condensed phase are considered on the basis of the Boltzmann–Krook–Welander equation. First, the formation and propagation of disturbances in an initially uniform gas blowing against its plane condensed phase are investigated under the conventional boundary condition on the condensed phase to supplement the authors’ previous work, where some solutions require more detailed computation. Then, with the aid of time-dependent analysis, the behavior of steady condensation is clarified: The range of the variables at infinity and on the condensed phase that allows a steady solution is determined; the profiles of typical steady solutions are presented.