Effect of vertical vibrations on the onset of binary convection
Group publication title: Subject and Keywords:gravity modulation ; g-jitter ; double diffusive convection ; perturbation method
Abstract:In the present work the linear stability analysis of double diffusive convection in a binary fluid layer is performed. The major intention of this study is to investigate the influence of time-periodic vertical vibrations on the onset threshold. A regular perturbation method is used to compute the critical Rayleigh number and wave number. A closed form expression for the shift in the critical Rayleigh number is calculated as a function of frequency of modulation, the solute Rayleigh number, Lewis number, and Prandtl number. ; These parameters are found to have a significant influence on the onset criterion; therefore the effective control of convection is achieved by proper tuning of these parameters. Vertical vibrations are found to enhance the stability of a binary fluid layer heated and salted from below. The results of this study are useful in the areas of crystal growth in micro-gravity conditions and also in material processing industries where vertical vibrations are involved.
Publisher:Zielona Góra: Uniwersytet Zielonogórski
Date: Resource Type: Format: DOI: Pages: Source:IJAME, volume 18, number 3 (2013)
Language: License: License CC BY-NC-ND 4.0: Rights: