INTENSE EVAPORATION OF MOLECULAR GAS

The Mott-Smith method is used to solve the kinetic problem on strong e vaporation of a polyatomic gas from a flat surface into proper vapor. Allowance is made for the contribution from the internal degrees of fr eedom to the total specific heat of gas. Analytical expressions are ob tained for the temperature and concentration of mono-, bi-, and triato mic gases in the region of flow formation. The structure of Knudsen la yer is investigated. A considerable effect of molecular excitation on the temperature of evaporating gas is shown.