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International Heat Transfer Conference 9

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)


J. S. Campbell
School of Mechanical Engineering Purdue University, West Lafayette, IN 47907, USA

Frank P. Incropera
School of Mechanical Engineering, Purdue University, Indiana, U.S.A.; University of Notre Dame

DOI: 10.1615/IHTC9.3960
pages 311-316


Solidification of a pure substance (water) has been studied experimentally under mixed convection conditions in a vertical channel. For downflow between chilled vertical plates, buoyancy forces accelerate fluid in the thermal boundary layers which develop at the solid/liquid (s/l) interfaces and may induce flow reversal. Such reversal occurs for Grashof-to-Reynolds number ratios Gr/Re2 ≥ 200 and is manifested by upflow in narrow regions adjoining the downward buoyancy driven streams, as well as by development of a nearly stagnant region in the channel core. Heat transfer enhancement due to buoyancy occurs for Gr/Re2 ≥ 50.

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