Artery Research

Volume 21, Issue C, March 2018, Pages 1 - 8

Effect of angulation and Reynolds number on recirculation at the abdominal aorta-renal artery junction

Authors
Mohammed Ameenuddin, Mohan Anand*
Chemical Engineering, Indian Institute of Technology Hyderabad, Sangareddy, Telangana, 502285, India
*Corresponding author. Department of Chemical Engineering, Indian Institute of Technology Hyderabad, Sangareddy, Telangana, 502285, India. Fax +91 040 23016032. E-mail address: anandm@iith.ac.in (M. Anand).
Corresponding Author
Mohan Anand
Received 8 October 2017, Revised 4 November 2017, Accepted 22 November 2017, Available Online 14 December 2017.
DOI
https://doi.org/10.1016/j.artres.2017.11.007How to use a DOI?
Keywords
Abdominal aorta, Atherosclerosis, Recirculation, Renal artery, Yeleswarapu model
Abstract

We investigate the effect of renal artery angle variation and Reynolds number on the probability of formation of atherosclerosis-prone regions at the abdominal aorta-renal artery junction. The rheologically accurate shear-thinning Yeleswarapu model for blood is used to simulate flow in a 3-Dimensional T-junction whose dimensions are those of the human abdominal aorta-renal artery junction. The recirculation length and wall shear stresses are evaluated at the junction for steady, laminar flow using ANSYS FLUENT v14.5. The recirculation length and wall shear stresses are calculated for Reynolds number of 500–1500, and the angle of renal artery (with the horizontal axis) of −20° to +20°. Computational fluid dynamics analysis for the flow conditions used in present study show that the flow recirculation and low wall shear stress regions overlap at the top surface of renal artery downstream of the entrance and at the curved surface of abdominal aorta downstream of the junction, making these regions susceptible to atherosclerosis. Further investigations show that positive angles of renal artery have larger area of recirculation and larger low wall shear stress regions. The recirculation length increases with Reynolds number, and it is maximum when θ = +20°, and minimum when θ = −20°.

Copyright
© 2017 Association for Research into Arterial Structure and Physiology. Published by Elsevier B.V. All rights reserved.
Open Access
This is an open access article distributed under the CC BY-NC license.

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Journal
Artery Research
Volume-Issue
21 - C
Pages
1 - 8
Publication Date
2017/12
ISSN (Online)
1876-4401
ISSN (Print)
1872-9312
DOI
https://doi.org/10.1016/j.artres.2017.11.007How to use a DOI?
Copyright
© 2017 Association for Research into Arterial Structure and Physiology. Published by Elsevier B.V. All rights reserved.
Open Access
This is an open access article distributed under the CC BY-NC license.

Cite this article

TY  - JOUR
AU  - Mohammed Ameenuddin
AU  - Mohan Anand
PY  - 2017
DA  - 2017/12
TI  - Effect of angulation and Reynolds number on recirculation at the abdominal aorta-renal artery junction
JO  - Artery Research
SP  - 1
EP  - 8
VL  - 21
IS  - C
SN  - 1876-4401
UR  - https://doi.org/10.1016/j.artres.2017.11.007
DO  - https://doi.org/10.1016/j.artres.2017.11.007
ID  - Ameenuddin2017
ER  -