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TECHNICAL PAPERS

Numerical Simulation of Pulsatile Flow in a Compliant Curved Tube Model of a Coronary Artery

[+] Author and Article Information
Yuchen Qiu, John M. Tarbell

Department of Chemical Engineering and the Bioengineering Program, The Pennsylvania State University, University Park, PA 16802

J Biomech Eng 122(1), 77-85 (Aug 22, 1999) (9 pages) doi:10.1115/1.429629 History: Received June 20, 1998; Revised August 22, 1999
Copyright © 2000 by ASME
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References

Figures

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Schematic diagram of the stress pattern applied to the EC layer lining a blood vessel wall. WSS: axial wall shear stress; CS: circumferential strain; SPA: stress phase angle, where: SPA=φ(CS)−φ(WSS);T: circumferential stress: P: internal pressure.
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The diameter variation and flow rate wave forms measured by Atabek et al. 25 in a resting dog: (a) diameter variation; (b) input flow rate. Vertical lines indicate time instants referenced in Figs. 456.
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Velocity vectors in the plane of symmetry at different time instants during one cycle: (a) t=0.05; (b) t=0.4; (c) t=0.7. The velocity scale arrow represents 3.33 times the mean inlet velocity.
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Axial velocity contours (normalized by the mean axial velocity) in a cross section located 90 deg of curvature from tube entrance at different time instants during one cycle: (a) t=0.05; (b) t=0.40; (c) t=0.7
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Secondary velocity vectors at the 90 deg cross section at different time instants: (a) t=0.05; (b) t=0.4; (c) t=0.7. The velocity scale arrow represents 0.208 times the mean inlet velocity.
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Axial wall shear stress histories during one cycle at both the outside (top) and inside (bottom) wall at the 90 deg cross section
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(a) Axial distributions of mean axial wall shear stress at the outside and inside walls. (b) Comparison of the mean axial WSS distribution with that obtained in steady flow at the mean flow rate. Note the change in scale for wall shear stress in (b).
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Axial distributions of the WSS pulse amplitude at both the outside and inside wall
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Axial distributions of oscillatory shear index (OSI) at the outside and inside walls
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Peripheral distributions of mean secondary WSS at axial positions 90 and 180 deg from the tube entrance
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Peripheral distributions of secondary WSS pulse amplitude at axial positions 90 and 180 deg from the tube entrance
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Axial distributions of the stress phase angle (SPA) at the outside and inside walls

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