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Pulsatile flow through a constricted tube: effect of stenosis morphology on hemodynamic parameters

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  • Panagiotis Kelidis
  • Efstathios Konstantinidis

Abstract

In this paper, we investigate pulsatile flow through a constricted tube with the aim of assessing the effect of stenosis morphology on hemodynamic parameters. The fluid-solid interaction of pulsatile flow through a compliant tube with elastic walls was simulated using an arbitrary Lagrangian-Eulerian (ALE) finite-element method. We consider blood flow through various mild stenoses of 25.8% severity in diameter with trapezoidal and bell-like morphologies at a fixed Womersley number of 7.75. The results show that the distribution of the time-averaged wall shear stress (TAWSS), which is the main factor affecting the hemodynamic parameters, strongly depends on the axial stretch of the stenosis; elongation of the stenotic region increases by 41.1% the maximum TAWSS for stenoses of trapezoidal morphology whereas the maximum TAWSS decreases by 14.8% for the corresponding stenoses of bell-like morphology. The present findings indicate that risk factors due to atherosclerosis may vary in a complicated manner as an atheromatous plaque gradually builds up and morphs with time.

Suggested Citation

  • Panagiotis Kelidis & Efstathios Konstantinidis, 2018. "Pulsatile flow through a constricted tube: effect of stenosis morphology on hemodynamic parameters," Computer Methods in Biomechanics and Biomedical Engineering, Taylor & Francis Journals, vol. 21(7), pages 479-487, May.
    • Handle: RePEc:taf:gcmbxx:v:21:y:2018:i:7:p:479-487
    DOI: 10.1080/10255842.2018.1481505
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