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ISSN Online: 2377-424X

ISBN Print: 0-89116-909-1

International Heat Transfer Conference 9
August, 19-24, 1990 , Jerusalem, Israel

MIXED CONVECTION IN AN ASYMMETRICALLY HEATED VERTICAL PARALLEL-PLATE DUCT FLOW

Get access (open in a dialog) DOI: 10.1615/IHTC9.2330
pages 369-374

要約

Measurements and predictions of mixed convection air flow in an asymmetrically heated vertical parallel-plate duct having unequal but uniform wall temperatures are reported. Velocity distributions were measured and flow visualizations were employed to examine the nature of the flow as the buoyancy effects were enhanced by increasing either the interwall temperature difference or by decreasing the forced flow velocity. The velocity distribution skews toward the heated wall and a flow reversal develops adjacent to the cold wall as the buoyancy force increases. Criteria marking the onset of the reversed flow and the transition from laminar to turbulent flow are reported for increasing asymmetric heating, increasing interwall spacing, and increasing forced flow velocities. Numerical predictions of velocity distributions for laminar flow compare well with experimental results. Numerical predictions of temperature distributions and heat transfer results are also presented to illustrate the effects of buoyancy on these parameters.