Pressure Measurements in Highly Viscous and Elastic Fluids

[+] Author and Article Information
Bulent Yesilata, Alparslan Öztekin, Sudhakar Neti, Jacob Kazakia

Department of Mechanical Engineering and Mechanics, Lehigh University, Bethlehem, PA 18015

J. Fluids Eng 122(3), 626-633 (May 09, 2000) (8 pages) doi:10.1115/1.1287927 History: Received May 03, 1999; Revised May 09, 2000
Copyright © 2000 by ASME
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Schematic of experimental setup for manometry system
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Height of the fluid as a function of time for different values of applied pressure shown in (a) dimensional and (b) nondimensional form
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Relative error between the predicted and measured xmax as a function of (t2−t1)/ts for three different values of t1
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Schematic of fluid-filled transducer/pipe system
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Pressure readings for multiple-step-sequence experiments: (a) Multiple-step increases applied (shown with solid line) and pressure readings by transducer/pipe system (shown with closed symbol), (b) the comparison between the results of experimental and theoretical model
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Pressure variations of square wave pulse with periods tp/tr of (a) 6, (b) 1, and (c) 0.33
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(a) Axial pressure distribution in inertialess circular pipe flow of a PIB/PB/C14 polymer solution at different values of flow rate (or De). (b) Pressure at two axial locations depicted as a function of De in creeping pipe flow of PIB Boger fluid. The predictions by Oldroyd-B model are shown by solid lines without the hole pressure effect and by dashed lines with the hole pressure effect. Open symbols denote measurements using standing fluid columns (manometry) and solid symbols denote measurements using transducers.




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