Abstract
The motive of the present numerical study is to analyze the density maximum effect of double diffusive buoyancy-driven convection in a square porous box. The horizontal walls are treated as adiabatic and the vertical walls are maintained with different temperatures. The right wall is heated sinusoidally while the left wall kept with constant temperature. The concentration on the left and right walls of the box are Cl and Ch, respectively, with Ch> Cl. The present study uses finite volume method to solve the governing equations. The effects of buoyancy ratio, density inversion parameter, Darcy number and porosity are studied by using the Brinkmann-Forchheimer extended Darcy model. It is observed that the bicellular structure is formed due to density inversion. When Tm =1, the average mass and thermal energy transfer rates are high for every values of buoyancy ratio. When Tm =0.4, the average mass and thermal energy transfer rates are low for all values of N due to density maximum of water.
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