Vibration-induced thermal convection in fluid-saturated porous media

G. Rajen, F. A. Kulacki

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Thermal convection in a porous square cavity undergoing harmonic oscillations along a longitudinal axis is analyzed using a finite difference technique. The cavity is heated with an end-to-end temperature difference across the walls parallel to the axis of vibration. The vibration of the cavity induces a secondary convective movement governed by a Rayleigh number based on a vibrational acceleration instead of on the gravitational acceleration as in the case of a stationary cavity in a static gravitational field. The Nusselt number across the cavity is found to oscillate, with a period of oscillation dependent on the frequency of vibration, as well as on the vibrational Rayleigh number. As the vibrational Rayleigh number and the frequency of oscillation of the cavity increase, the amplitude of the Nusselt number's oscillation increases, and its period decreases.

Original languageEnglish (US)
Title of host publicationFundamentals of Heat Transfer in Porous Media - 1992
PublisherPubl by ASME
Number of pages4
ISBN (Print)0791809196
StatePublished - Dec 1 1992
Event28th National Heat Transfer Conference and Exhibition - San Diego, CA, USA
Duration: Aug 9 1992Aug 12 1992

Publication series

NameAmerican Society of Mechanical Engineers, Heat Transfer Division, (Publication) HTD
ISSN (Print)0272-5673


Other28th National Heat Transfer Conference and Exhibition
CitySan Diego, CA, USA


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