Nonlinear Theory III — Finite Speed of Evaporation and Condensation

  • Yoshio Sone
Part of the Modeling and Simulation in Science, Engineering and Technology book series (MSSET)


In the preceding chapter, we have discussed a flow with a finite Mach number around a simple boundary, across which there is no mass flux. In the present chapter we consider a flow of a gas around its condensed phase where evaporation or condensation with speed of a finite Mach number is taking place. Owing to the convection effect of condensing or evaporating flow of the order of the Mach number, the viscous boundary layer, which appears in a flow with a finite Mach number around a simple boundary (Chapter 6), shrinks to merge into the Knudsen layer over a condensing boundary, or the layer spreads into the whole flow field (or the Euler region) over an evaporating boundary and the viscous effect is reduced to a secondary one there. The Euler region is connected directly to the Knudsen layer. Instead, the Knudsen layer is governed by a nonlinear equation in contrast to that in the foregoing chapters.


Condensed Phase Knudsen Number Velocity Distribution Function Knudsen Layer Maxwell Molecule 
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Copyright information

© Springer Science+Business Media New York 2002

Authors and Affiliations

  • Yoshio Sone
    • 1
  1. 1.Kyoto UniversitySakyo-ku KyotoJapan

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