On the gravitational motion of a nonuniformly heated solid particle in a gaseous medium |
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Authors: | N V Malai E R Shchukin A A Stukalov and K S Ryazanov |
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Institution: | 1.Belgorod State University,Belgorod,Russia;2.Joint Institute of High Temperatures,Russian Academy of Sciences,Moscow,Russia;3.VIOGEM Federal State Unitary Enterprise,Belgorod,Russia |
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Abstract: | The steady motion of a nonuniformly heated spherical aerosol particle through a viscous gaseous medium is theoretically studied
in the Stokes approximation. It is assumed that the mean temperature of the particle surface may differ appreciably from the
ambient temperature. The solution of gasdynamic equations yields an analytical expression for the drag of the medium and the
gravitational fall velocity of the nonuniformly heated spherical solid particle with allowance for the temperature dependence
of the density of the medium and molecular transfer coefficients (viscosity and thermal conductivity). Numerical estimates
show that heating of the particle surface considerably influences the drag force and gravitational fall velocity. |
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