Advertisement

Effects of Phase Relationships on Wall Shear Stress in Curved and Straight Elastic Artery Models

  • J. M. Tarbell
  • M. Klanchar
  • A. Dutta
Conference paper

Abstract

Wall shear stress, diameter and flow waveforms were measured in elastic curved and straight tube physical models under sinusoidal flow conditions with up to 11% diameter variation. The straight tube experiments were simulated with a theoretical model. Both the experiments and the theoretical model predict extreme sensitivity of wall shear stress to the phase angle between wall shear stress and diameter. Under fixed flow waveform conditions, the experiments showed as much as a five-fold increase in wall shear stress over a 20–40 deg change in phase angle. The onset of strong wall shear stress reversal was also observed in this sensitive phase angle range. Even greater effects were predicted by the theoretical model which covered a broader range of phase angle variations. These results suggest that wall elasticity may play an important role in determining wall shear stress distributions in large arteries.

Keywords

Phase Angle Wall Shear Stress Straight Tube Diameter Variation Oscillatory Shear Index 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    McDonald WA (1974) Blood Flow in Arteries. Williams and Wilkins CoGoogle Scholar
  2. [2]
    Patel DJ, Vaishnav RN (1980) Basic Hemodynamics and Its Role in Disease Processes. University Park PressGoogle Scholar
  3. [3]
    Chang LJ, Tarbell JM (1986) Proceedings of the 39th ACEMB, p 304.Google Scholar
  4. [4]
    Chang LJ (1985) A Numerical and Experimental Study of Unsteady Flow in Rigid and Elastic Curved Tubes. Ph.D. Thesis, Penn State UnivGoogle Scholar
  5. [5]
    Liepsch D, Moravec S (1984) Biorheology 21: 5Google Scholar
  6. [6]
    Mark FF, Deters OJ, Bargeron CB, Friedman MH (1985) Proceedings of the ASME Winter Annual Meeting, p 59Google Scholar
  7. [7]
    Chang LJ, Tarbell JM (1985) J Fluid Mech 161: 175CrossRefGoogle Scholar
  8. [8]
    Ku DN, Giddens DP, Zarins CK, Glagov, S (1985) Arteriosclerosis 5: 29Google Scholar
  9. [9]
    Merillon JP, Fontenier GJ, Lerallut JF, Jaffrin MY, Motte GA, Genain CP, Gourgon RR (1982) Cardiovasc Res 16: 646–56PubMedCrossRefGoogle Scholar
  10. [10]
    Caro CG, Fish PJ, Goss DE, Halls J, Lever MJ, Parker KH, Stacey-Clear A (1985) Proc Physiol Soc 98P, 28–29 MarchGoogle Scholar

Copyright information

© Springer-Verlag Tokyo 1988

Authors and Affiliations

  • J. M. Tarbell
    • 1
  • M. Klanchar
    • 1
  • A. Dutta
    • 1
  1. 1.Department of Chemical EngineeringThe Pennsylvania State UniversityUSA

Personalised recommendations