Journal of Advanced Marine Engineering and Technology

The Korean Society of Marine Engineering (한국마린엔지니어링학회)
권호 표지
DOI QR코드

DOI QR Code

Effects of stenotic severity on the flow structure in a circular channel under a pulsatile flow

  • Kim, Kyung-Won (Department of Mechanical Engineering, Kyungpook National University) ;
  • Cheema, Taqi-Ahmad (Department of Mechanical Engineering, Kyungpook National University) ;
  • Park, Cheol-Woo (School of Mechanical Engineering, Kyungpook National University)
  • Received : 2013.10.30
  • Accepted : 2013.12.04
  • Published : 2014.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

Stenosis is the drastic reduction in the cross-sectional area of blood vessel caused by accumulations of cholesterol. It affects the blood flow property and structure from the fluid dynamic point of view. To understand the flow phenomenon more clearly, a particle image velocimetry method is used and the fluid dynamic characteristics in a circular channel containing stenosis structure is investigated experimentally in this study. Different stenotic-structured models made of acrylic material are subjected to a pulsatile flow generated by an in-house designed pulsatile pump. The inner diameter of the tube inlet is 20 mm and the length of reduced area for stenosis ranges between 35mm and 40mm. It is circulated continuously through a circular channel by the pump system. Pressure is measured at four different sections during systolic and diastolic phase changes. The phase-averaged velocity field distribution shows a recirculation regime after the stenotic structure. The effects of the stenotic obstructions are found to be more severe when the aspect ratio is varied.

Keywords

References

  1. J. V. Soulis, T. M. Farmakis, G. D. Giannoglou, and G. E. Louridas , "Wall shear stress in normal left coronary artery tree" Journal of Biomechanics, vol. 39, no. 4, pp. 742-779, 2006. https://doi.org/10.1016/j.jbiomech.2004.12.026
  2. M. Ojha, C. Cobbold, K. W. Johnston, and R. L. Hummel, "Pulsatile flow through constricted tubes: An experimental investigation using photochromic tracer methods," Journal of Fluid Mechanics, vol. 203, pp. 173-197, 1989. https://doi.org/10.1017/S0022112089001424
  3. S. S. Varghese and S. H. Frankel, "Numerical modeling of pulsatile turbulent flow in stenotic vessels," Journal of Biomechanical Engineering, vol. 125, pp. 445-460, 2003. https://doi.org/10.1115/1.1589774
  4. S. A. Ahmed and D. P. Giddens, "Velocity measurements in steady flow through axisymmetric stenosis at moderate reynolds number," Journal of Biomechanics, vol. 16, pp. 505-516, 1983. https://doi.org/10.1016/0021-9290(83)90065-9
  5. M. Kang, H. S. Ji, and K. C. Kim, "In-vitro investigation of RBCs' flow characteristics and hemodynamic feature through a micro channel with a micro-stenosis", International Journal of Biology and Biomedical Engineering, vol. 2, pp. 1-8, 2008.
  6. M. Siebes, B. J. Verhoeff, M. Meuwissen, R. J. Winter, J. A. E. Spaan and J. J. Piek, "Single-wire pressure and flow velocity measurement to quantify coronary stenosis hemodynamics and effects of percutaneous interventions", Circulation, vol. 109, pp. 756-762, 2004. https://doi.org/10.1161/01.CIR.0000112571.06979.B2
  7. K. M. Marques, H. J. Spruijt, C. Boer, N. Westerhof, C. A. Visser, and F. C. Visser, "The diastolic flow-pressure gradient relation in coronary stenoses in humans", Journal of the American College of Cardiology, vol. 39, no. 10, pp. 1630-1636, 2002. https://doi.org/10.1016/S0735-1097(02)01834-X
  8. Y. H. Joo, K. W. Kim, Y. H. Lee, M. K. Kwak, C. Y. Lee, J. M. Lee, and C. W. Park, "Design of pulsatile pump and performance test for pulsatile flow generation", Journal of the Korean Society of Marine Engineering, vol. 37, no. 2, pp. 149-155, 2013. https://doi.org/10.5916/jkosme.2013.37.2.149
  9. Y. I. Cho, K. R. Kensey, "Effects of the non-Newtonian viscosity of blood on hemodynamics of diseased arterial flows: Part 1, steady flows", Biorheology, vol. 28, pp 241-262, 1991.
  10. R. C. Lima, C. R. Andrade, E. L. Zaparoli, "Numerical study of three recirculation zones in the unilateral sudden expansion flow", International Communications in Heat and Mass Transfer, vol. 35, pp. 1053-1060, 2008. https://doi.org/10.1016/j.icheatmasstransfer.2008.07.004
  11. W. J. Yang, Biothermal Fluid Sciences, Principles and Applications, Hemisphere, New York, 1989.