Photophoresis of heated moderately large spherical aerosol particles

Steady-state motion of a moderately large solid aerosol spherical particle electromagnetically irradiated in a gas is described theoretically in the Stokes approximation. In the consideration of the motion, it was supposed that the average temperature of the particle surface could differ considerably from the temperature of the gaseous medium surrounding the particle. In the process of the solution of the gas dynamic equations, analytical expressions for the photophoresis force and velocity were obtained, with allowance for the dependencies of density and viscosity of the gaseous medium and thermal conductivity on temperature.