Numerical Study of Double Diffusive Convection within the Annular Region of Two Concentric Vertical Cylinders

Abstract:

This article reports a numerical study of double-diffusive convection within the annular region of two concentric vertical cylinders. The outer vertical wall is maintained at lower uniform temperature and concentration, while the inner vertical wall is maintained at higher uniform temperature and concentration. The top and bottom horizontal walls are adiabatic and impermeable to mass transfer. The resulting governing equations are solved using a finite volume method. The coupling between the continuity and momentum equations is solved using the SIMPLER algorithm. The compilations have been obtained for Prandtl numbers (Pr) equal to 7.0, and Lewis number (Le) equal to 100. The thermal Rayleigh number (Ra_T) and height ratio (X) are, respectively, varied in the range 10³≤Ra_T≤10⁶ and 0.0≤X≤1.0. The influence of physical and geometrical parameters on the streamlines, isotherms, isoconcentrations, average Nusselt and Sherwood numbers has been numerically investigated in detail.

• Periodical: Defect and Diffusion Forum (Volume 374)
• Pages: 1-17
• DOI: https://doi.org/10.4028/www.scientific.net/DDF.374.1
• Online since: April 2017
• Authors: Mohamed Amine Medebber*, Noureddine Retiel
• Keywords: Double-Diffusive Convection, Finite Volume Method, Nusselt Number, Partially Annular, Sherwood Numbers

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