抄録
A weak evaporation from a droplet was studied based upon a linearized kinetic model equation which yields correct thirteen moments derived from the Boltzmann equation. The basic equation was solved using a singular perturbation method. Obtained results showed that density and temperature jumps at the droplet surface were weakly dependent upon the model equations if they were measured in the same length scale and against certain extensive values such as mass flux or heat flux. These extensive values of order O(Kn) were, however, dependent upon the Prandtl number through the heat conductivity, while they were little dependent upon a scaling factor of the collision frequency. The thickness of the Knudsen layer was however stretched by the inverse of the scaling factor compared with the one of the BGK model equation.
