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Measurements of the Effective Tensile Strength of Newtonian and Non-Newtonian Fluids Under Dynamic Stressing

[+] Author Affiliations
P. Rhodri Williams, Rhodri L. Williams, Stephen W. J. Brown

University of Wales at Swansea, Swansea, UK

Paper No. FEDSM2002-31020, pp. 451-454; 4 pages
doi:10.1115/FEDSM2002-31020
From:
  • ASME 2002 Joint U.S.-European Fluids Engineering Division Conference
  • Volume 1: Fora, Parts A and B
  • Montreal, Quebec, Canada, July 14–18, 2002
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 0-7918-3615-0 | eISBN: 0-7918-3600-2
  • Copyright © 2002 by ASME

abstract

The ‘Bullet-Piston’ (B-P) dynamic stressing technique has been used to study the tensile strength, Fc , of Newtonian and non-Newtonian fluids. A comparative study of the effects of viscosity on Fc for silicone oils (Newtonian) and aqueous polyacrylamide (PAA) solutions (non-Newtonian) was made. Both systems exhibited a power law dependency of the form Fc ∝ µn , where µ is the viscosity and n is the power index. For the Newtonian system, n was found to be 0.09 in close agreement with the findings of Couzens and Trevena (1974) for silicone oils whilst a value of 0.16 was found for the PAA solutions.

Copyright © 2002 by ASME

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