Kinetic Theory of Evaporation and Condensation —Hydrodynamic Equation and Slip Boundary Condition—
Abstract
The steady behavior of a gas in contact with its condensed phase of arbitrary shape is investigated on the basis of kinetic theory. The Knudsen number of the system (the mean free path of the gas molecules divided by the characteristic length of the system) being assumed to be fairly small, the hydrodynamic equations for the macroscopic quantities, the velocity, temperature, and pressure, of the gas and their boundary conditions on the interface of the gas and its condensed phase are derived, and two simple examples (evaporation from a sphere, twosurface problem of evaporation and condensation) are worked out.
 Publication:

Journal of the Physical Society of Japan
 Pub Date:
 June 1978
 DOI:
 10.1143/JPSJ.44.1981
 Bibcode:
 1978JPSJ...44.1981S
 Keywords:

 Boundary Conditions;
 Boundary Layer Flow;
 Condensing;
 Evaporation;
 Gas Flow;
 Hydrodynamic Equations;
 Kinetic Theory;
 Slip Flow;
 Heat Transfer;
 Knudsen Flow;
 Spheres;
 Stress Tensors;
 Fluid Mechanics and Heat Transfer