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International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Imprimir: 2152-5102
ISSN On-line: 2152-5110

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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v37.i6.30
pages 530-552

Variation of Wall Shear Stress and Flow Characteristics Across Cosine Shaped Stenotic Model with Flow Reynolds Number and Degree of Stenosis

Moloy Kumar Banerjee
Department of Mechanical Engineering, Future Institute of Engineering and Management Kolkata, India
Ranjan Ganguly
Department of Power Engineering, Jadavpur University Kolkata 700098, India
Amitava Datta
Power Engineering Department, Jadavpur University, Salt Lake Campus, Kolkata 700098, India

RESUMO

A numerical analysis has been carried out to investigate the hemodynamic flow through stenosed arteries having mild (S = 25 %) to severe (S = 65 %) occlusions and under different regimes of flow Reynolds numbers ranging from 50 to 400, considering laminar flow and modeling blood as both Newtonian and non-Newtonian fluid. Reattachment point, wall shear stress, and it's physiological aspects have been studied in detail. From the study, it is revealed that for all the cases a sharp variation in dimensionless wall shear stress (WSS) is observed near the zone of restriction. The maximum value of this peak WSS in the stenosed region is more sensitive to a change in the degree of occlusion rather than change in the flow Re. Atherosclerotic plaque formation tends to start from very low flow Reynolds number of 50 with 50 % restriction. For Reynolds numbers of 200 and above, it starts at 25 % stenosed condition.


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A Computational Study on the Physiologically Realistic Pulsatile Flow through an Eccentric Arterial Stenosis
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