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LAMINAR NATURAL CONVECTION IN A SQUARE CAVITY WITH A PARTITION ON THE HEATED VERTICAL WALL

DOI: 10.1615/ICHMT.2009.CONV.1190
17 pages

Wenjiang Wu
Department of Mechanical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada

Chan Y. Ching
Department of Mechanical Engineering, McMaster University, Hamilton, Ontario, L8S4L7, Canada

Sinopsis

The laminar natural convection in an air-filled square cavity with a partition on the heated vertical wall was experimentally investigated. Temperature measurements and flow visualizations were performed for cases with heated and cooled vertical walls (corresponding to a global Grashof number GrH of approximately 1.4×108 ) and non-dimensional top wall temperatures θT of 0.57 (insulated) to 2.3. Experiments were performed with an aluminium partition with nondimensional height HP/H of 0.0625 and 0.125 attached to the heated vertical wall at y/H = 0.65 and 0.95. The blockage effect and/or the thermal effect of the partition resulted in changes to the temperature and flow fields, but were mainly limited to the vicinity of the partition. For the cases with the heated top wall, the change in the height of the partition at y/H = 0.95resulted in changes to the ambient temperature outside the boundary layer due to the reduction of the size of the recirculating flow in the corner region. The changes in the partition height and the top wall temperature affected the blockage effect of the partition, resulting in the local Nusselt number near the corner region to be affected. The local Nusselt number over most of the heated vertical wall of the partitioned cavity (y/H ≤ 0.7 ) was correlated to the local Rayleigh number in the form Nu = C· Ran.

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