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ISSN Online: 2377-424X

ISBN Print: 0-89116-299-2

International Heat Transfer Conference 7
September, 6-10, 1982, Munich, Germany

HEAT TRANSFER TO GAS-SOLIDS TWO-PHASE FLOW IN SEPARATED, REATTACHED, AND REDEVELOPMENT REGIONS

Get access (open in a dialog) DOI: 10.1615/IHTC7.4480
pages 249-254

要約

Heat transfer from an isothermal plate behind a rearward-facing step to a gas-solids two-phase flow has been experimentally investigated using spherical glass particles for mass loading ratios up to 2.0 and step Reynolds numbers ranging from 1500 to 5800. The addition of solid particles to a gas flow increases the heat transfer coefficient in the redevelopment region, but decreases the maximum value of heat transfer coefficient in the reattachment region for smaller particles and higher step Reynolds numbers. The maximum value of Nusselt numbers in a gas-solids two-phase flow is correlated with the step Reynolds number at a fixed ratio of the particle diameter to the step height for constant mass loading ratio. Heat transfer characteristics in a two-phase flow are correlated to the fluid flow behavior measured by a modified laser Doppler anemometer whose signal processing permits a particle size discrimination of coarse particles and fine powder as a tracer of gas phase.