The fluid flow through a stenosed artery and its bypass graft in an anastomosis can substantially influence the outcome of bypass surgery. To help improve our understanding of this and related issues, the steady Navier-Stokes flows are computed in an idealized arterial bypass system with partially occluded host artery. Both the residual flow issued from the stenosis—which is potentially important at an earlier stage after grafting—and the complex flow structure induced by the bypass graft are investigated. Seven geometric models, including symmetric and asymmetric stenoses in the host artery, and two major aspects of the bypass system, namely, the effects of area reduction and stenosis asymmetry, are considered. By analyzing the flow characteristics in these configurations, it is found that (1) substantial area reduction leads to flow recirculation in both upstream and downstream of the stenosis and in the host artery near the toe, while diminishes the recirculation zone in the bypass graft near the bifurcation junction, (2) the asymmetry and position of the stenosis can affect the location and size of these recirculation zones, and (3) the curvature of the bypass graft can modify the fluid flow structure in the entire bypass system.
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August 2005
Technical Papers
Fluid Flow Structure in Arterial Bypass Anastomosis
C. M. Su,
C. M. Su
Department of Mechanical and Aerospace Engineering,
University of Florida
, Gainesville, FL 32611 and Institute of Aeronautics and Astronautics,
National Cheng Kung University
, Tainan, Taiwan, ROC
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D. Lee,
D. Lee
Institute of Aeronautics and Astronautics,
National Cheng Kung University
, Tainan, Taiwan, ROC
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R. Tran-Son-Tay,
R. Tran-Son-Tay
Department of Mechanical and Aerospace Engineering,
University of Florida
, Gainesville, FL 32611
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W. Shyy
W. Shyy
Department of Mechanical and Aerospace Engineering,
University of Florida
, Gainesville, FL 32611
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C. M. Su
Department of Mechanical and Aerospace Engineering,
University of Florida
, Gainesville, FL 32611 and Institute of Aeronautics and Astronautics,
National Cheng Kung University
, Tainan, Taiwan, ROC
D. Lee
Institute of Aeronautics and Astronautics,
National Cheng Kung University
, Tainan, Taiwan, ROC
R. Tran-Son-Tay
Department of Mechanical and Aerospace Engineering,
University of Florida
, Gainesville, FL 32611
W. Shyy
Department of Mechanical and Aerospace Engineering,
University of Florida
, Gainesville, FL 32611J Biomech Eng. Aug 2005, 127(4): 611-618 (8 pages)
Published Online: February 15, 2005
Article history
Received:
April 20, 2004
Revised:
February 15, 2005
Citation
Su, C. M., Lee, D., Tran-Son-Tay, R., and Shyy, W. (February 15, 2005). "Fluid Flow Structure in Arterial Bypass Anastomosis." ASME. J Biomech Eng. August 2005; 127(4): 611–618. https://doi.org/10.1115/1.1934056
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