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Hemorheology and the Flow Behavior in a Separated Flow Region

[+] Author Affiliations
Khaled J. Hammad

Central Connecticut State University, New Britain, CT

Paper No. IMECE2013-62548, pp. V07AT08A012; 8 pages
doi:10.1115/IMECE2013-62548
From:
  • ASME 2013 International Mechanical Engineering Congress and Exposition
  • Volume 7A: Fluids Engineering Systems and Technologies
  • San Diego, California, USA, November 15–21, 2013
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5631-4
  • Copyright © 2013 by ASME

abstract

Separating flows can be encountered in the cardiovascular circulatory system and many biomedical applications such as artificial organs, rotary blood pumps, heart valves, stents, catheters, and probes. The current study investigates the influence of hemorheology on the flow behavior in a confined separated flow region. Recent hemorheological models and data are utilized to account for the yield stress and shear-thinning non-Newtonian characteristics of human blood. The flow field information is obtained by numerically solving the governing mass and momentum conservation equations along with the Herschel-Bulkley rheological model. The yield shear-thinning model always results in the smallest flow separation region. The yield stress and shear-thinning non-Newtonian models predict lower recirculation strength in comparison with the Newtonian model.

Copyright © 2013 by ASME

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