Coupled Radiation and Double Diffusive Convection in Nongray Air-CO₂and Air-H₂O Mixtures in Cooperating Situations

Study of coupled double diffusive convection–radiation in a tilted cavity via a hybrid multi-relaxation time-lattice Boltzmann-finite difference and discrete ordinate methods

“…The gas is assumed homogeneous and the flow follows the Boussinesq approximation. To carry out this validation, we leaned on the work of Meftah et al [24]. It is clearly noted ( Table 4) that our results corroborate those of Fusegi and Farouk [13], and of Meftah et al [24].…”

“…9. Stop the iterative process when the convergence is deemed finished via the criterion given by the relationship (24); otherwise, use the new fields of temperature and concentration and go back to step 6.…”

“…This implies that the number of gray gas (characterized by N g ) in addition to the grid size (characterized by M g ) has an important influence on the accuracy of the results in the calculations using the SLW approach. In the accuracy test concerning the mesh effects on the numerical solution for coupled double diffusive convection and radiation of non-gray gas, we studied the physical problem investigated by Meftah et al [24]. Based on the values of Nusselt numbers (convective and total) and Sherwood (Table 2), we note that our solution becomes insensitive to further refinement beyond a 69 9 69 mesh.…”

“…Two flow cases in square cavity containing a non-gray gas are checked for accuracy. Several authors have also used these test cases to validate their models, including Fusegi and Farouk [13] and Meftah et al [24].…”

“…In general, they found that the flow is considerably slowed in opposing case. Recently, Meftah et al [24][25][26] performed a numerical study of gas radiation effects on opposing double-diffusive convection in a no-gray air-CO 2 and air-H 2 O mixtures filling a straight cavity. To carry out this study, they leaned on a FDM-DOM formulation.…”