Impact of Modelling Surface Roughness in an Arterial Stenosis

Arterial stenosis is a problem of immediate significance, as cardiovascular disease is the number one leading cause of death worldwide. Generally, the study of stenotic flow assumes a smooth, curved stenosis and artery. However, the real situation is unlikely to present an infinitely smooth-surfaced...

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Bibliographic Details
Published in:Fluids (Basel) 2022-05, Vol.7 (5), p.179
Main Authors: Yi, Jie, Tian, Fang-Bao, Simmons, Anne, Barber, Tracie
Format: Article
Language:English
Subjects:
Accuracy
arterial stenosis
Cardiovascular diseases
Computational fluid dynamics
Coronary vessels
Fluid dynamics
Hydrodynamics
Oscillating flow
Reynolds number
Shear stress
Simulation
Surface roughness
Veins & arteries
Velocity
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Summary:Arterial stenosis is a problem of immediate significance, as cardiovascular disease is the number one leading cause of death worldwide. Generally, the study of stenotic flow assumes a smooth, curved stenosis and artery. However, the real situation is unlikely to present an infinitely smooth-surfaced arterial stenosis. Here, the impact of surface roughness on the flow in an arterial stenosis was studied via a computational fluid dynamics analysis. A patient-specific geometry with a smooth surface was reconstructed, and a partially rough model was built by artificially adding random roughness only on the stenotic region of the smooth model. It was found that the flow was oscillatory downstream of the stenosis in the models. A slightly lower velocity near the wall and more oscillatory flows were observed due to the presence of the roughness in the stenotic region. However, the pressure distributions did not vary significantly between the smooth and rough models. The differences in the wall shear metrics were slight in the stenotic region and became larger in the downstream region of the models.
ISSN:2311-5521
2311-5521
DOI:10.3390/fluids7050179