Energy Considerations in the Flow Enhancement of Viscoelastic Liquids

[+] Author and Article Information
A. Siginer, A. Valenzuela-Rendón

Department of Mechanical Engineering, Auburn University, Auburn, AL 36849

J. Appl. Mech 60(2), 344-351 (Jun 01, 1993) (8 pages) doi:10.1115/1.2900799 History: Received August 20, 1991; Revised June 03, 1992; Online March 31, 2008


Flow enhancement effects due to different waveforms in the tube flow of rheologically complex fluids driven by a pulsating pressure gradient are investigated. It is found that the squarer the waveform the larger the enhancement. In each case the enhancement is strongly dependent on the viscosity function, but the elastic properties also play an important role. We determine that considerable energy savings may be obtained in the transport of viscoelastic liquids if an oscillatory gradient is superposed on a mean gradient. The closer the oscillation to the square wave the larger the energy savings.

Copyright © 1993 by The American Society of Mechanical Engineers
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