Helical flows have been observed in the ascending aorta in vivo, and geometric curvature has been suggested to be a major contributing factor. We employed magnetic resonance imaging (MRI) and velocity mapping to develop a computational model to examine the effects of curvature and also wall compliance and movement upon flow patterns. In the computational model, MRI-derived geometry and velocities were imposed as boundary conditions, which included both radial expansion-contraction and translational motion of the wall. The computed results were in agreement with the MR data only when full wall motion was included in the model, suggesting that the flow patterns observed in the ascending aorta arise not only from geometric curvature of the arch but also from the motion of the aorta resulting from its attachment to the beating heart.
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June 2003
Technical Papers
Effects of Wall Motion and Compliance on Flow Patterns in the Ascending Aorta
Suo Jin,
Suo Jin
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University School of Medicine, Atlanta, GA 30332
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John Oshinski,
John Oshinski
Department of Radiology, Emory University School of Medicine, Atlanta, GA 30322
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Don P. Giddens
Don P. Giddens
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University School of Medicine, Atlanta, GA 30332
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Suo Jin
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University School of Medicine, Atlanta, GA 30332
John Oshinski
Department of Radiology, Emory University School of Medicine, Atlanta, GA 30322
Don P. Giddens
Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology/Emory University School of Medicine, Atlanta, GA 30332
Contributed by the Bioengineering Division for publication in the JOURNAL OF BIOMECHANICAL ENGINEERING. Manuscript received by the Bioengineering Division June 2002; revised manuscript received January 2003. Associate Editor: C. Ross Ethier.
J Biomech Eng. Jun 2003, 125(3): 347-354 (8 pages)
Published Online: June 10, 2003
Article history
Received:
June 1, 2002
Revised:
January 1, 2003
Online:
June 10, 2003
Citation
Jin, S., Oshinski, J., and Giddens, D. P. (June 10, 2003). "Effects of Wall Motion and Compliance on Flow Patterns in the Ascending Aorta ." ASME. J Biomech Eng. June 2003; 125(3): 347–354. https://doi.org/10.1115/1.1574332
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