High accuracy numerical investigation of double-diffusive convection in a rectangular enclosure with horizontal temperature and concentration gradients

2014 ◽  
Vol 71 ◽  
pp. 405-423 ◽  
Author(s):  
Q. Qin ◽  
Z.A. Xia ◽  
Zhen F. Tian
Keyword(s):  
Numerical Investigation ◽  
High Accuracy ◽  
Double Diffusive Convection ◽  
Concentration Gradients ◽  
Rectangular Enclosure ◽  
Diffusive Convection ◽  
Double Diffusive

Lattice BGK Simulation of Hydromagnetic Double-Diffusive Convection in a Rectangular Enclosure with Linearly Variable Temperature and Concentration Gradients

2010 ◽  
Vol 44-47 ◽  
pp. 2414-2427
Author(s):  
Xue Mei Liu ◽  
Han Jun Lu ◽  
Mei Ying Ye ◽  
You Sheng Xu
Keyword(s):  
Hartmann Number ◽  
Variable Temperature ◽  
Double Diffusive Convection ◽  
Concentration Gradients ◽  
Rectangular Enclosure ◽  
Diffusive Convection ◽  
Binary Gas Mixture ◽  
Left And Right ◽  
Dimensionless Heat ◽  
Double Diffusive

Hydromagnetic double-diffusive convection of a binary gas mixture is simulated by a temperature-concentration latitce Bhatnagar-Gross-Krook (TCLBGK) model in a rectangular enclosure with the top and bottom walls being insulated, while linearly variable temperature or concentration gradient or both are imposed along the left and right walls from the bottom to the top and a uniform magnetic field is applied in x-direction. we take the Prandtl number =1, the Lewis =2, the thermal Raleigh number =105, the Hartmann number =0, 25, 50, the dimensionless heat generation or absorption =0, the aspect ration =2 for the enclosure and the ratio of buoyancy forces =0.8, 1.3. Numerical results are discussed in detail. It is founded that linearly variable temperature and concentration gradients have significant influence on the stratification and direction of streamlines and convection.

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