Thermophoretic Motion of Large Heated Aerosol Spherical Particles
N. V. Malai1, A. V. Limanskaya1, E. R. Shchukin2
1Belgorod State National Research University, Belgorod, 308007 Russia
2Joint Institute of High Temperatures, Moscow, 125412 Russia
Keywords: термофорез нагретых сферических частиц, движение нагретых сферических частиц в поле градиента температуры, thermophoresis of heated spherical particles, motion of heated spherical particles in a gradient temperature field
Abstract
The stationary motion of a large spherical aerosol particle in the external field of a temperature gradient in zero gravity is theoretically described using the Stokes approximation and the assumption that the average temperature of the particle surface differs considerably from the temperature of the surrounding gaseous medium. The gas dynamics equations are solved taking into account the power-law temperature dependence of the molecular transport coefficients (viscosity, thermal conductivity) and the density of the gaseous medium. Numerical estimates show that the dependence of the thermophoretic force and velocity on the average temperature of the particle surface is nonlinear.
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