Interaction of Rayleigh-Benard convection and oscillatory flows [Code 119334]

Abstract

The effects of oscillatory flow structures on transient convective heat transfer in an air-filled shallow enclosure with a vibrating side wall are investigated. Oscillatory flows and Rayleigh-Benard convection have been extensively studied by using theoretical and experimental methods. To our best knowledge, the influence of oscillatory flows on classical Rayleigh-Benard convection problem has not been studied. In the present study, fluid motion is driven by the periodic vibration of the enclosure side wall. The vertical walls of enclosure are adiabatic while the bottom wall is isothermally heated and top wall is kept at initial temperature. The fully compressible forms of the Navier-Stokes and energy equations are considered to compute the interaction of oscillatory and gravitational flow fields. A control-volume method based, explicit time-marching Flux-Corrected Transport (FCT) Algorithm is used to simulate the transport phenomena in the enclosure. Results of a test case simulation with stationary walls are compared with the existing literature for code validation. The oscillatory fluid motion significantly changes the transient behavior of the in the enclosure compared the pure Rayleigh- Benard convection.