Abstract
In this paper, the thermal convection field and its resonance phenomena in a square cavity with sinusoidal heat-flux vibration were numerically examined. As angular velocity ω is changed, the thermal convection field at Pγ=0.71, Rα=106 is found to be classified into 5 regions and, particularly, the field has the local maximum of relative amplitude of midplane Nusselt's number at ωc=350, which corresponds to the angular velocity of internal gravity wave ωγ estimated by a theoretical equation proposed by Thorpe. This shows the local enhancement is induced by an internal gravity wave resonance. Such correspondence is observed for Rα≥105, Rα≥106 for Pγ=0.71, 7.1, respectively. For the range of Rα we proposed a correlation equation, a function of Pγ and Gγ only, to estimate the resonant angular velocity.
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