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Thermal levitation

Published online by Cambridge University Press:  10 July 2008

F. MANDUJANO  and
R. RECHTMAN
F. MANDUJANO
Affiliation:
Centro de Investigación en Energía, Universidad Nacional Autónoma de México, Apdo. Postal 34, 62580 Temixco, Mor., Mexico
R. RECHTMAN*
Affiliation:
Centro de Investigación en Energía, Universidad Nacional Autónoma de México, Apdo. Postal 34, 62580 Temixco, Mor., Mexico
*
†Author to whom correspondence should be addressed: rrs@cie.unam.mx
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Abstract

A particle with a density slightly larger than that of the fluid in which it is immersed will sediment. However, if the particle's temperature is higher than that of the fluid, the terminal velocity of sedimentation will be smaller and can even change sign. When the terminal velocity is zero we say there is thermal levitation. Thermal levitation can also occur when the density and temperature of the particle are smaller than those of the fluid. Using a two-component thermal lattice Boltzmann equation method, we study this phenomenon and show it can be stable or unstable.

Type
Papers
Information
Journal of Fluid Mechanics , Volume 606 , 10 July 2008 , pp. 105 - 114
Copyright
Copyright © Cambridge University Press 2008

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