The assumption of Newtonian behavior to characterize circulating blood is applicable to large, healthy, arteries of the vasculature. However, at low shear strain rates, blood displays marked non-Newtonian behavior resulting from red blood cell adhesion. Consequently, the consideration of non-linear viscous behavior may be of critical importance to accurately quantify critical hemodynamic parameters in separated flow regimes associated with low shear strain rates (1). Walker et al. (1) measured noteworthy reductions in the propagation of negative axial velocities and oscillatory shear patterns downstream of a stent wire using a non-Newtonian blood analog while Choi and Barakat (2) used CFD to predict non-Newtonian reductions in recirculation length downstream of a backward facing step.
- Bioengineering Division
The Experimental Investigation of Flow Separation Downstream of an Axisymmetric Stenosis in Newtonian and Non-Newtonian Flow Environments
Walker, AM, Johnston, CR, & Rival, DE. "The Experimental Investigation of Flow Separation Downstream of an Axisymmetric Stenosis in Newtonian and Non-Newtonian Flow Environments." Proceedings of the ASME 2013 Summer Bioengineering Conference. Volume 1A: Abdominal Aortic Aneurysms; Active and Reactive Soft Matter; Atherosclerosis; BioFluid Mechanics; Education; Biotransport Phenomena; Bone, Joint and Spine Mechanics; Brain Injury; Cardiac Mechanics; Cardiovascular Devices, Fluids and Imaging; Cartilage and Disc Mechanics; Cell and Tissue Engineering; Cerebral Aneurysms; Computational Biofluid Dynamics; Device Design, Human Dynamics, and Rehabilitation; Drug Delivery and Disease Treatment; Engineered Cellular Environments. Sunriver, Oregon, USA. June 26–29, 2013. V01AT13A012. ASME. https://doi.org/10.1115/SBC2013-14336
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