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Abstract
The present study numerically investigates the mixed convection-conduction problem of impingement cooling of a finite thickness solid wall conjugated with a porous medium. The heat transfer is investigated over wide ranges of governing parameters: Rayleigh number (50 ≤ Ra ≤ 100), Péclet number (1 ≤ Pe ≤ 103), solid wall thickness (0.05 ≤ H ≤ 0.25), heat transfer coefficient parameter (0.1 ≤ H v ≤ 10), and solid wall thermal conductivity (0.24 ≤ k w ≤ 240). The results shows that the total average Nusselt numbers can be increased with the decrease in H and increase in k w and H v . Opposing mixed convection is demonstrated to occur and the minimum value of average Nusselt numbers for fluid are found except for a low value of k w .
