CFD Analysis on Effect of Angulation in A Healthy Abdominal Aorta-Renal Artery Junction

Hegde, Pranav and Shenoy, Gowrava B and Khader, Abdul S M and Pai, Raghuvir B and Rao, Srikanth D and Tamagawa, Masaaki and Prabhu, Ravindra and Kumar, Nithesh and Ahmad, Kamarul Arifin (2021) CFD Analysis on Effect of Angulation in A Healthy Abdominal Aorta-Renal Artery Junction. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 88 (1). pp. 149-165. ISSN 2289-7879

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The recent developments in computational fluid dynamics (CFD) can be useful in observing the detailed haemodynamics in renal artery bifurcation for clinical evaluation and treatment. The present study focuses on haemodynamic behaviour of blood as it flows through the abdominal aorta-renal artery junction in an idealistic healthy artery with varying bifurcation angles to the abdominal aorta, i.e. from 30° to 90° with increments of 15°. This is to examine the effect of angulation on the junction and to determine whether arterial geometry plays a role in the prediction of atherosclerotic lesions. The three-dimensional models used in this study were generated using ANSYS WORKBENCH 19.0, and numerical simulation was done using FLUENT 19.0 solver. The blood flow is assumed to be Newtonian, incompressible and laminar. Haemodynamic parameters such as velocity, wall pressure and wall shear stress along with flow variation are compared among the different models. As the angulation increased, velocity and wall shear stress at the ostial region decreased by 14% and 52% respectively. Wall pressure at the same region saw an increase by 3%. Therefore, renal arteries with higher bifurcating angles to the abdominal aorta were observed to be more prone to the formation of atherosclerotic lesions. The present study is a precursor for future studies on renal artery with stenosis.

Item Type: Article
Uncontrolled Keywords: Renal artery bifurcation; haemodynamics; newtonian flow; flow recirculation; computational fluid dynamics
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Medicine > KMC Manipal > Nephrology
Depositing User: MIT Library
Date Deposited: 07 Jan 2022 05:03
Last Modified: 07 Jan 2022 05:03

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