Laminar Forced Convective Heat Transfer in Rectangular Cavity with Three Heated Blocks and Attached Baffle
Abstract
The laminar forced convective heat transfer in rectangular cavity with three heated blocks subjected to constant heat flux at bottom wall. A single baffle was attached to the top wall. A steady, incompressible, and laminar flow assumption was adopted to solve a numerical of two-dimensional cavity mode. The finite volumes approach was used to solve the governing equations and employed the SIMPLE algorithm on the collocated arrangement. The numerical simulation was performed at different cavity aspect ratios L/H (3.2, 3.8, 4.5, and 5.6), different baffle height ratio h/H (0, 0.2, 0.3, and 0.4) and different block height given ratio b/H (0.2, 0.4, 0.5, and 0.8). The air inlet to the cavity with at various Raleigh number (8.2×106 to 4.9×107) and Richardson number at (1.3, 2.1, 3.6, and 8.2). In addition, to study the effect of using the forced convection heat transfer the Reynolds number was varied as (1100, 1170, 1900, and 2100). The results of the flow and temperature distributions and Nusselt numbers were presented. The results showed that the velocity and temperatures were affected by the flow and geometrical conditions of the cavity. Also, the results predicted that the Nusselt number increased with increasing Reynolds number, baffle height ratio and box height ratio but it decreased with increasing the cavity aspect ratio in all studied conditions.
