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ISSN: 1064-2277 Print
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DOI: 10.1615/InterJFluidMechRes.v36.i4
Pages: 103
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DOI: 10.1615/InterJFluidMechRes.v36.i4.30
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Article price - $80.00 |
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Study on Pressure Drop and Center Line Velocity Distribution Across Cosine Shaped Stenotic Model
Moloy Kumar Banerjee
Department of Basic Science and Humanities, College of Engineering and Management, Kolaghat, India
Ranjan Ganguly
Department of Power Engineering, Jadavpur University Kolkata 700098, India
Amitava Datta
Department of Power Engineering, Jadavpur University Kolkata 700098, India
ABSTRACT
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.
pages 319-342
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