The impedance (pressure drop/flow rate) of four curved artery models has been determined experimentally for steady and periodic flows simulating conditions in the aortic arch. Steady flow results indicate that very short entry lengths are required for flow development in curved artery models, and impedance is elevated above straight tube values by a factor of 3–4 for mean flow conditions in the aortic arch. Results for periodic flow with a nonzero mean show a significant elevation of mean flow impedance relative to values for steady flow at the mean flow rate—a factor of 2–3 for aortic arch flow conditions. The impedance of the first harmonic of periodic flows follows straight tube theory at high values of the unsteadiness parameter in agreement with available theory for curved tubes. The implications of the impedance measurements for wall shear stress in the aortic arch are discussed.
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August 1983
Research Papers
The Impedance of Curved Artery Models
S. G. Kang,
S. G. Kang
Department of Chemical Engineering, and The Bioengineering Program, The Pennsylvania State University, University Park, Pa. 16802
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J. M. Tarbell
J. M. Tarbell
Department of Chemical Engineering, and The Bioengineering Program, The Pennsylvania State University, University Park, Pa. 16802
Search for other works by this author on:
S. G. Kang
Department of Chemical Engineering, and The Bioengineering Program, The Pennsylvania State University, University Park, Pa. 16802
J. M. Tarbell
Department of Chemical Engineering, and The Bioengineering Program, The Pennsylvania State University, University Park, Pa. 16802
J Biomech Eng. Aug 1983, 105(3): 275-282 (8 pages)
Published Online: August 1, 1983
Article history
Received:
June 29, 1982
Revised:
March 28, 1983
Online:
June 15, 2009
Citation
Kang, S. G., and Tarbell, J. M. (August 1, 1983). "The Impedance of Curved Artery Models." ASME. J Biomech Eng. August 1983; 105(3): 275–282. https://doi.org/10.1115/1.3138418
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