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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-05-01
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| Series: | Fluids |
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| Online Access: | https://www.mdpi.com/2311-5521/7/5/179 |
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| author | Jie Yi Fang-Bao Tian Anne Simmons Tracie Barber |
| author_facet | Jie Yi Fang-Bao Tian Anne Simmons Tracie Barber |
| author_sort | Jie Yi |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-10T03:54:14Z |
| format | Article |
| id | doaj.art-83df273045634e1e9c53796ad315eb21 |
| institution | Directory Open Access Journal |
| issn | 2311-5521 |
| language | English |
| last_indexed | 2024-03-10T03:54:14Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fluids |
| spelling | doaj.art-83df273045634e1e9c53796ad315eb212023-11-23T10:58:10ZengMDPI AGFluids2311-55212022-05-017517910.3390/fluids7050179Impact of Modelling Surface Roughness in an Arterial StenosisJie Yi0Fang-Bao Tian1Anne Simmons2Tracie Barber3School of Mechanical & Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, AustraliaSchool of Engineering & Information Technology, University of New South Wales, Canberra, ACT 2612, AustraliaSchool of Mechanical & Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, AustraliaSchool of Mechanical & Manufacturing Engineering, University of New South Wales, Sydney, NSW 2052, AustraliaArterial 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.https://www.mdpi.com/2311-5521/7/5/179surface roughnessarterial stenosisshear stresscomputational fluid dynamics |
| spellingShingle | Jie Yi Fang-Bao Tian Anne Simmons Tracie Barber Impact of Modelling Surface Roughness in an Arterial Stenosis Fluids surface roughness arterial stenosis shear stress computational fluid dynamics |
| title | Impact of Modelling Surface Roughness in an Arterial Stenosis |
| title_full | Impact of Modelling Surface Roughness in an Arterial Stenosis |
| title_fullStr | Impact of Modelling Surface Roughness in an Arterial Stenosis |
| title_full_unstemmed | Impact of Modelling Surface Roughness in an Arterial Stenosis |
| title_short | Impact of Modelling Surface Roughness in an Arterial Stenosis |
| title_sort | impact of modelling surface roughness in an arterial stenosis |
| topic | surface roughness arterial stenosis shear stress computational fluid dynamics |
| url | https://www.mdpi.com/2311-5521/7/5/179 |
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