Hemolysis (damage to red blood cells) is a long-standing problem in blood contacting devices, and its prediction has been the goal of considerable research. The most popular model relating hemolysis to fluid stresses is the power-law model, which was developed from experiments in pure shear only. In the absence of better data, this model has been extended to more complex flows by replacing the shear stress in the power-law equation with a von Mises-like scalar stress. While the validity of the scalar stress also remains to be confirmed, inconsistencies exist in its application, in particular, two forms that vary by a factor of have been used. This article will clarify the proper extension of the power law to complex flows in a way that maintains correct results in the limit of pure shear.
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December 2016
Technical Briefs
Extending the Power-Law Hemolysis Model to Complex Flows
Mohammad M. Faghih,
Mohammad M. Faghih
Biofluid Mechanics Laboratory,
Department of Mechanical Engineering,
University of Louisville,
Louisville, KY 40292
Department of Mechanical Engineering,
University of Louisville,
Louisville, KY 40292
Search for other works by this author on:
M. Keith Sharp
M. Keith Sharp
Biofluid Mechanics Laboratory,
Department of Mechanical Engineering,
University of Louisville,
Louisville, KY 40292
Department of Mechanical Engineering,
University of Louisville,
Louisville, KY 40292
Search for other works by this author on:
Mohammad M. Faghih
Biofluid Mechanics Laboratory,
Department of Mechanical Engineering,
University of Louisville,
Louisville, KY 40292
Department of Mechanical Engineering,
University of Louisville,
Louisville, KY 40292
M. Keith Sharp
Biofluid Mechanics Laboratory,
Department of Mechanical Engineering,
University of Louisville,
Louisville, KY 40292
Department of Mechanical Engineering,
University of Louisville,
Louisville, KY 40292
Manuscript received April 23, 2016; final manuscript received September 9, 2016; published online November 4, 2016. Assoc. Editor: Ender A. Finol.
J Biomech Eng. Dec 2016, 138(12): 124504 (4 pages)
Published Online: November 4, 2016
Article history
Received:
April 23, 2016
Revised:
September 9, 2016
Citation
Faghih, M. M., and Keith Sharp, M. (November 4, 2016). "Extending the Power-Law Hemolysis Model to Complex Flows." ASME. J Biomech Eng. December 2016; 138(12): 124504. https://doi.org/10.1115/1.4034786
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