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RESEARCH PAPERS: Forced Convection

Non-Newtonian Flow and Heat Transfer in an Obstructed Channel With Radio-Frequency Heating

[+] Author and Article Information
R. W. Hill, T. L. Bergman

Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX 78712

J. Heat Transfer 117(4), 889-894 (Nov 01, 1995) (6 pages) doi:10.1115/1.2836307 History: Received December 01, 1994; Revised July 01, 1995; Online January 23, 2008

Abstract

The hydrodynamic and thermal conditions associated with the flow of a non-Newtonian fluid (polystyrene), which is heated volumetrically by electric radio-frequency excitation, is considered. The fluid is forced through a two-dimensional channel having local, stationary blocks, which restrict the flow and are maintained at a constant rms voltage potential. Detailed and overall system response is examined for a range of fluid velocities, restriction sizes, and radio-frequency heating rates. This heating reduces the pressure drop induced by the restriction and alters the flow structure, suggesting that it may be used to control and augment conventional injection molding operations.

Copyright © 1995 by The American Society of Mechanical Engineers
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