Active Control of the Onset of Convection in Porous Medium by Mechanical Vibration
Part of the
NATO Science Series
book series (NAII, volume 134)
Theoretical studies of Rayleigh-Bénard convection subjected to sinusoidal acceleration modulations have been conducted by several workers. Linear and weakly nonlinear stability analyses have been developed by Gresho and Sani , Clever et al.  and by the Russian workers Gershuni and Lyubimov . As shown by these studies, the Rayleigh number for the onset of synchronous convection increases with the frequency of vibration for a layer oscillating with constant vertical amplitude until a certain frequency of modulation is reached and at which the onset is in the form of subharmonic motions.
KeywordsPorous Medium Rayleigh Number Linear Stability Analysis Critical Rayleigh Number Vertical Vibration
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