A Numerical Investigation of the Effect of Stenosed Trapezoidal Shape Models on Sinusoidal Pulsatile Hemodynamics for Arterial Blood Flow

International Journal of Mechanical Engineering

© 2025 by SSRG - IJME Journal

Volume 12 Issue 10

Year of Publication : 2025

Authors : Md. Jashim Uddin

10.14445/23488360/IJME-V12I10P106

How to Cite?

Md. Jashim Uddin, "A Numerical Investigation of the Effect of Stenosed Trapezoidal Shape Models on Sinusoidal Pulsatile Hemodynamics for Arterial Blood Flow," SSRG International Journal of Mechanical Engineering, vol. 12,  no. 10, pp. 60-78, 2025. Crossref, https://doi.org/10.14445/23488360/IJME-V12I10P106

Abstract:

Numerical computations of the flow pulsation in a stenotic vessel are employed to examine the various trapezoidal stenosis shapes’ impact on the flow characteristics around the stenotic and post-stenotic zones. The finite element method-based COMSOL Multiphysics software is adopted with a satisfactory verification of the numerical technique. The findings show that both Wall Shear Stress (WSS) and wall pressure rise with higher flow rates and larger sizes of stenosis. Womersley numbers (Wo) significantly dominate the wall pressure, but there are no considerable effects on the peak WSS. The wall pressure profile is shown to be more influenced by the shape of mild contraction than the moderate contraction and right-angle expansion shape (model III). It is also transpired that the WSS of the shape of mild contraction is larger than that of the shape of moderate contraction and right-angle expansion (model III) around the blockage area, and model III shows the greater recirculation length downstream of stenosis. The relative residence time in correspondence with the oscillatory shear index’s second peak at the locations of flow recirculation shows the more disturbed flow patterns for model III. Therefore, patients with different models of stenosis will significantly affect atherosclerotic hemodynamics.

Keywords:

Computational Fluid Dynamics, Womersley number, Hemodynamic risk factors, Recirculation length, Hemodynamics.

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