Computational fluid dynamics simulation of rough bed open channels using openFOAM
With increased flood risk due to climate change, population expansion and urbanisation; robust waterway design and management are critical. One common type of waterway used to gather and transport ground water is the open channel. Most simulations do not account for the physical roughness of the bed...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2022-10-01
|
| Series: | Frontiers in Environmental Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fenvs.2022.981680/full |
| _version_ | 1811339762172166144 |
|---|---|
| author | Yun-Hang Cho Yun-Hang Cho My Ha Dao Andrew Nichols |
| author_facet | Yun-Hang Cho Yun-Hang Cho My Ha Dao Andrew Nichols |
| author_sort | Yun-Hang Cho |
| collection | DOAJ |
| description | With increased flood risk due to climate change, population expansion and urbanisation; robust waterway design and management are critical. One common type of waterway used to gather and transport ground water is the open channel. Most simulations do not account for the physical roughness of the bed, instead using a roughness coefficient. This means that only the turbulent energy content can be modelled whilst physical turbulent eddies and vortices cannot. Furthermore, many past studies assume the free surface is a rigid lid. This could affect the way that turbulent structures near the free surface behave. Computational Fluid Dynamics simulation of an open channel with a rough bed and rigid lid are conducted using OpenFOAM. Results show good correlation with experimental tests. It can be visually observed that turbulent structures generated from the rough bed do interact with the free surface and thus a rigid lid is perhaps not a great approximation. This is supported by an apparent decrease in the Reynolds shear stress from the free surface and 30% of the flow depth immediately beneath. |
| first_indexed | 2024-04-13T18:31:29Z |
| format | Article |
| id | doaj.art-627f9051461649aa917275b0a997fc24 |
| institution | Directory Open Access Journal |
| issn | 2296-665X |
| language | English |
| last_indexed | 2024-04-13T18:31:29Z |
| publishDate | 2022-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Environmental Science |
| spelling | doaj.art-627f9051461649aa917275b0a997fc242022-12-22T02:35:04ZengFrontiers Media S.A.Frontiers in Environmental Science2296-665X2022-10-011010.3389/fenvs.2022.981680981680Computational fluid dynamics simulation of rough bed open channels using openFOAMYun-Hang Cho0Yun-Hang Cho1My Ha Dao2Andrew Nichols3Department of Fluid Dynamics, Institute of High Performance Computing, Agency for Science, Technology, and Research, Singapore, SingaporeSheffield Water Center, Department of Civil and Structural Engineering, University of Sheffield, Sheffield, United KingdomDepartment of Fluid Dynamics, Institute of High Performance Computing, Agency for Science, Technology, and Research, Singapore, SingaporeSheffield Water Center, Department of Civil and Structural Engineering, University of Sheffield, Sheffield, United KingdomWith increased flood risk due to climate change, population expansion and urbanisation; robust waterway design and management are critical. One common type of waterway used to gather and transport ground water is the open channel. Most simulations do not account for the physical roughness of the bed, instead using a roughness coefficient. This means that only the turbulent energy content can be modelled whilst physical turbulent eddies and vortices cannot. Furthermore, many past studies assume the free surface is a rigid lid. This could affect the way that turbulent structures near the free surface behave. Computational Fluid Dynamics simulation of an open channel with a rough bed and rigid lid are conducted using OpenFOAM. Results show good correlation with experimental tests. It can be visually observed that turbulent structures generated from the rough bed do interact with the free surface and thus a rigid lid is perhaps not a great approximation. This is supported by an apparent decrease in the Reynolds shear stress from the free surface and 30% of the flow depth immediately beneath.https://www.frontiersin.org/articles/10.3389/fenvs.2022.981680/fullopen channelcomputational fluid dynamicsopenFOAMrough bed channelsfree surface |
| spellingShingle | Yun-Hang Cho Yun-Hang Cho My Ha Dao Andrew Nichols Computational fluid dynamics simulation of rough bed open channels using openFOAM Frontiers in Environmental Science open channel computational fluid dynamics openFOAM rough bed channels free surface |
| title | Computational fluid dynamics simulation of rough bed open channels using openFOAM |
| title_full | Computational fluid dynamics simulation of rough bed open channels using openFOAM |
| title_fullStr | Computational fluid dynamics simulation of rough bed open channels using openFOAM |
| title_full_unstemmed | Computational fluid dynamics simulation of rough bed open channels using openFOAM |
| title_short | Computational fluid dynamics simulation of rough bed open channels using openFOAM |
| title_sort | computational fluid dynamics simulation of rough bed open channels using openfoam |
| topic | open channel computational fluid dynamics openFOAM rough bed channels free surface |
| url | https://www.frontiersin.org/articles/10.3389/fenvs.2022.981680/full |
| work_keys_str_mv | AT yunhangcho computationalfluiddynamicssimulationofroughbedopenchannelsusingopenfoam AT yunhangcho computationalfluiddynamicssimulationofroughbedopenchannelsusingopenfoam AT myhadao computationalfluiddynamicssimulationofroughbedopenchannelsusingopenfoam AT andrewnichols computationalfluiddynamicssimulationofroughbedopenchannelsusingopenfoam |