Numerical Analysis on A Non-Critical Stenosis in Renal Artery

Authors

  • Pranav Hegde Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
  • Gowrava Shenoy B. Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
  • A B V Barboza Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
  • S. M. Abdul Khader Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
  • Raghuvir Pai Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
  • Masaaki Tamagawa Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, 808-0196, Fukuoka, Japan
  • Ravindra Prabhu Department of Nephrology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India
  • D. Srikanth Rao Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

DOI:

https://doi.org/10.37934/arfmts.88.3.3148

Keywords:

CFD, Renal Artery Stenosis, Angulation, Non-critical stenosis

Abstract

The increase in cardiovascular diseases worldwide has resulted in higher death rate of people globally; the primary reason being atherosclerosis. A better understanding of this condition can be achieved through the application of numerical methods to understand the haemodynamics. The present study aims to investigate the effects of renal artery angulation on the flow characteristics in a non-critically stenosed artery compared to that of a normal artery in order to understand better, the reasons for causes and progression of renal artery stenosis. Abdominal aorta-renal artery models ranging from 30° to 90° angulations were generated from computerized tomography-angiogram slices, post which they were subjected to cleanup and defeaturing. Haemodynamic parameters such as velocity, pressure and time-averaged wall shear stress were evaluated at early systole, peak systole and peak diastole for the different artery models. Extensive amounts of flow recirculation were observed in normal renal arteries with higher bifurcating angles, whereas it was not the case in stenosed arteries where flow acceleration was seen for the duration of the cardiac cycle. Evaluation of static pressure encountered a similar trend where an increase in angulation saw a decrease in pressure for normal arteries which contradicted with stenosed artery results. Analysis of shear stress saw very similar trends in normal and stenosed arteries, with lower angulation profiles experiencing higher values of shear stress at the Ostia. In the cases of arteries of higher angulation with a non-critical stenosis, the possibility of worsening of stenosis into an opprobrious stage remains a concern.

Author Biographies

Pranav Hegde, Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

pranavhegde67@gmail.com

Gowrava Shenoy B., Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

gowrav.shenoy@manipal.edu

A B V Barboza, Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

a.barboza@manipal.edu

S. M. Abdul Khader, Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

smak.quadri@manipal.edu

Raghuvir Pai, Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

raghuvir.pai@manipal.edu

Masaaki Tamagawa, Department of Biological Functions Engineering, Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology, Kitakyushu, 808-0196, Fukuoka, Japan

tama@life.kyutech.ac.jp

Ravindra Prabhu, Department of Nephrology, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

ravindra.prabhu@manipal.edu

D. Srikanth Rao, Department of Mechanical Engineering and Manufacturing Engineering, Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal, 576104, Karnataka, India

ds.rao@manipal.edu

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Published

2021-11-06

How to Cite

Pranav Hegde, Gowrava Shenoy B., Barboza, A. B. V. ., Abdul Khader, S. M. ., Raghuvir Pai, Masaaki Tamagawa, Ravindra Prabhu, & D. Srikanth Rao. (2021). Numerical Analysis on A Non-Critical Stenosis in Renal Artery. Journal of Advanced Research in Fluid Mechanics and Thermal Sciences, 88(3), 31–48. https://doi.org/10.37934/arfmts.88.3.3148

Issue

Vol. 88 No. 3: December (2021)

Section

Articles

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