Hj. Keh et Jl. Yu, MIGRATION OF AEROSOL SPHERES UNDER THE COMBINED ACTION OF THERMOPHORETIC AND GRAVITATIONAL EFFECTS, Aerosol science and technology, 22(3), 1995, pp. 250-260
The migration of an aerosol spherical particle subject to the combined
action of gravity and a vertical temperature gradient is considered.
In the limit of small Reynolds and Peclet numbers, the solution for th
e stream function of the fluid flow and the migration velocity of part
icle is obtained by superposition of the individual solutions for sedi
mentation and thermophoresis. The flow structures for the fluid phase,
being illustrated via streamlines in meridian section, reveal complex
topology whether in the laboratory frame of reference or a reference
frame traveling with the particle. The results demonstrate that fresh
intuition must be developed regarding this class of problems.