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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.v36.i4.30
pages 319-342

Study on Pressure Drop and Center Line Velocity Distribution Across Cosine Shaped Stenotic Model

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

Arterial stenosis refers to the swelling of the endothelial wall due to plaque deposition and the associated disease is known as atherosclerosis. A stenosed artery reduces the maximum flow of blood through it by putting more resistance to the flow. The pressure of blood in a coronary artery is considered to be one of the important contributors for the formation and progression of atherosclerosis. Therefore, in this paper, the impact of flow Reynolds number(Re) and degree of stenosis (S) on wall pressure near the stenosis in a part of coronary artery is studied considering laminar flow and modeling blood as both Newtonian and non-Newtonian fluid. The two-dimensional steady differential equations for conservation of mass and momentum is solved by finite difference method through stenosed arteris having mild (S = 25 %) to severe (S = 65 %) occlusions and under different regimes of flow Reynolds numbers ranging from 50 to 400. From the study, it is revealed that for all the cases a sharp variation in dimensionless wall pressure is observed near the zone of restriction. The peak centerline velocity in the stenosed region is more sensitive to a change in the degree of occlusion rather than change in the flow Re. From the study it is also revealed that at high Re regime the irreversible pressure loss coefficient (CI) becomes insensitive to Re values and can be approximated to be a function of S only.


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