Detailed turbulent structures investigation around piers group induced flow
This paper aims to investigate the mean velocities and turbulence characteristics, which include Reynolds shear stresses (RSS) and turbulent intensities, in order to study temporal and spatial flow patterns around a complex three square-piers group. Measurements have been performed by acoustic Doppl...
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| Language: | en |
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Elsevier
2024
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| Online Access: | http://eprints.uthm.edu.my/11772/1/J17285_364de0a147a2748ad715f8254e054ddf.pdf http://eprints.uthm.edu.my/11772/ https://doi.org/10.1016/j.expthermflusci.2023.111112 |
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| author | Ikani, Nima H. Pu, Jaan Zang, Shuyan Hussein Al-Qadami, Ebrahim Hamid Razi, Adib |
| author_facet | Ikani, Nima H. Pu, Jaan Zang, Shuyan Hussein Al-Qadami, Ebrahim Hamid Razi, Adib |
| author_sort | Ikani, Nima |
| building | UTHM Library |
| collection | Institutional Repository |
| content_provider | Universiti Tun Hussein Onn Malaysia |
| content_source | UTHM Institutional Repository |
| continent | Asia |
| country | Malaysia |
| description | This paper aims to investigate the mean velocities and turbulence characteristics, which include Reynolds shear stresses (RSS) and turbulent intensities, in order to study temporal and spatial flow patterns around a complex three square-piers group. Measurements have been performed by acoustic Doppler velocimeter (ADV) to identify turbulence flow structures alteration and vortices formation in longitudinal, transverse, and vertical directions. In total, 164 locations around the bridge piers have been measured, while each location consists of no lesser than 15 vertical depth ADV data point measurements. To investigate the flow turbulence, critical locations have been observed from high vortex-influenced regions. The impacted mean velocity profiles have been compared to that at the unaffected region to study the flow alteration caused by piers group. The result reveals that the log-law layer near wall has been enhanced by the installation of pier. Furthermore, as identified from the most critical locations of turbulent structures across different measurement rows, the accelerated flow will result in lower observed turbulent structures. Although flow after each pier has been influenced by strong reversal velocities, vortices have managed to form at near wake. Analysis has been divided into inner and outer flow regions (IFR and OFR) based on flow depth to enhance the understanding of how bridge piers contribute to the development of flow turbulence. |
| format | Article |
| id | my.uthm.eprints-11772 |
| institution | Universiti Tun Hussein Onn Malaysia |
| language | en |
| publishDate | 2024 |
| publisher | Elsevier |
| record_format | eprints |
| spelling | my.uthm.eprints-117722025-02-18T01:37:07Z http://eprints.uthm.edu.my/11772/ Detailed turbulent structures investigation around piers group induced flow Ikani, Nima H. Pu, Jaan Zang, Shuyan Hussein Al-Qadami, Ebrahim Hamid Razi, Adib TC Hydraulic engineering. Ocean engineering This paper aims to investigate the mean velocities and turbulence characteristics, which include Reynolds shear stresses (RSS) and turbulent intensities, in order to study temporal and spatial flow patterns around a complex three square-piers group. Measurements have been performed by acoustic Doppler velocimeter (ADV) to identify turbulence flow structures alteration and vortices formation in longitudinal, transverse, and vertical directions. In total, 164 locations around the bridge piers have been measured, while each location consists of no lesser than 15 vertical depth ADV data point measurements. To investigate the flow turbulence, critical locations have been observed from high vortex-influenced regions. The impacted mean velocity profiles have been compared to that at the unaffected region to study the flow alteration caused by piers group. The result reveals that the log-law layer near wall has been enhanced by the installation of pier. Furthermore, as identified from the most critical locations of turbulent structures across different measurement rows, the accelerated flow will result in lower observed turbulent structures. Although flow after each pier has been influenced by strong reversal velocities, vortices have managed to form at near wake. Analysis has been divided into inner and outer flow regions (IFR and OFR) based on flow depth to enhance the understanding of how bridge piers contribute to the development of flow turbulence. Elsevier 2024 Article PeerReviewed text en http://eprints.uthm.edu.my/11772/1/J17285_364de0a147a2748ad715f8254e054ddf.pdf Ikani, Nima and H. Pu, Jaan and Zang, Shuyan and Hussein Al-Qadami, Ebrahim Hamid and Razi, Adib (2024) Detailed turbulent structures investigation around piers group induced flow. Experimental Thermal and Fluid Science, 152. pp. 1-15. https://doi.org/10.1016/j.expthermflusci.2023.111112 |
| spellingShingle | TC Hydraulic engineering. Ocean engineering Ikani, Nima H. Pu, Jaan Zang, Shuyan Hussein Al-Qadami, Ebrahim Hamid Razi, Adib Detailed turbulent structures investigation around piers group induced flow |
| title | Detailed turbulent structures investigation around piers group induced flow |
| title_full | Detailed turbulent structures investigation around piers group induced flow |
| title_fullStr | Detailed turbulent structures investigation around piers group induced flow |
| title_full_unstemmed | Detailed turbulent structures investigation around piers group induced flow |
| title_short | Detailed turbulent structures investigation around piers group induced flow |
| title_sort | detailed turbulent structures investigation around piers group induced flow |
| topic | TC Hydraulic engineering. Ocean engineering |
| url | http://eprints.uthm.edu.my/11772/1/J17285_364de0a147a2748ad715f8254e054ddf.pdf http://eprints.uthm.edu.my/11772/ https://doi.org/10.1016/j.expthermflusci.2023.111112 |
| url_provider | http://eprints.uthm.edu.my/ |