Errors and uncertainties in simulation of steady, viscous flow past a circular cylinder at Re = 20 using a systematic approach
The use of Computational Fluid Dynamics as a tool for design and analysis of aerospace systems is well established. Since the results generated by a CFD solver are numerical approximations, the solution is inherently produced with errors and uncertainties. In this paper, a simple fluid flow problem...
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| Format: | Article |
| Language: | English |
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National Institute for Aerospace Research “Elie Carafoli” - INCAS
2020-09-01
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| Series: | INCAS Bulletin |
| Subjects: | |
| Online Access: | https://bulletin.incas.ro/files/seeni__rajendran_hussin_ismail__vol_12_iss_3.pdf |
| _version_ | 1819226601977544704 |
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| author | Aravind SEENI Parvathy RAJENDRAN Mamat HUSSIN Farzad ISMAIL |
| author_facet | Aravind SEENI Parvathy RAJENDRAN Mamat HUSSIN Farzad ISMAIL |
| author_sort | Aravind SEENI |
| collection | DOAJ |
| description | The use of Computational Fluid Dynamics as a tool for design and analysis of aerospace systems is well established. Since the results generated by a CFD solver are numerical approximations, the solution is inherently produced with errors and uncertainties. In this paper, a simple fluid flow problem of laminar, incompressible flow past a circular cylinder at Reynolds number of 20 is allowed to be solved by the well-known finite-volume solver ANSYS Fluent. The effect of variations in mesh resolution, domain boundary location and residual criteria settings is investigated. For all the cases, finite, structured meshes of acceptable quality are used. The influence of variables on the cylinder’s drag results is analyzed and discussed. An interesting pattern in results has been observed. The study on the variation in mesh resolution showed no presence of mesh independent solution. The study on the variation of the domain distance showed that it is necessary to increase the diameter of the circle several thousand times to obtain a domain independent solution. |
| first_indexed | 2024-12-23T10:28:06Z |
| format | Article |
| id | doaj.art-522ff185a7064803b116173b9bf4d7b8 |
| institution | Directory Open Access Journal |
| issn | 2066-8201 2247-4528 |
| language | English |
| last_indexed | 2024-12-23T10:28:06Z |
| publishDate | 2020-09-01 |
| publisher | National Institute for Aerospace Research “Elie Carafoli” - INCAS |
| record_format | Article |
| series | INCAS Bulletin |
| spelling | doaj.art-522ff185a7064803b116173b9bf4d7b82022-12-21T17:50:30ZengNational Institute for Aerospace Research “Elie Carafoli” - INCASINCAS Bulletin2066-82012247-45282020-09-0112320321710.13111/2066-8201.2020.12.3.17Errors and uncertainties in simulation of steady, viscous flow past a circular cylinder at Re = 20 using a systematic approachAravind SEENI0Parvathy RAJENDRAN1Mamat HUSSIN2Farzad ISMAIL3School of Aerospace Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, 14300 Penang, Malaysia, aravind.seeni@student.usm.mySchool of Aerospace Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, 14300 Penang, Malaysia, aeparvathy@usm.mySchool of Aerospace Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, 14300 Penang, Malaysia, hussinm@usm.mySchool of Aerospace Engineering, Universiti Sains Malaysia, Engineering Campus, Nibong Tebal, 14300 Penang, Malaysia, aefarzad@usm.myThe use of Computational Fluid Dynamics as a tool for design and analysis of aerospace systems is well established. Since the results generated by a CFD solver are numerical approximations, the solution is inherently produced with errors and uncertainties. In this paper, a simple fluid flow problem of laminar, incompressible flow past a circular cylinder at Reynolds number of 20 is allowed to be solved by the well-known finite-volume solver ANSYS Fluent. The effect of variations in mesh resolution, domain boundary location and residual criteria settings is investigated. For all the cases, finite, structured meshes of acceptable quality are used. The influence of variables on the cylinder’s drag results is analyzed and discussed. An interesting pattern in results has been observed. The study on the variation in mesh resolution showed no presence of mesh independent solution. The study on the variation of the domain distance showed that it is necessary to increase the diameter of the circle several thousand times to obtain a domain independent solution.https://bulletin.incas.ro/files/seeni__rajendran_hussin_ismail__vol_12_iss_3.pdfnumerical errorsuncertaintiescircular cylindergrid independent solutiondomain independent solutiondrag coefficient |
| spellingShingle | Aravind SEENI Parvathy RAJENDRAN Mamat HUSSIN Farzad ISMAIL Errors and uncertainties in simulation of steady, viscous flow past a circular cylinder at Re = 20 using a systematic approach INCAS Bulletin numerical errors uncertainties circular cylinder grid independent solution domain independent solution drag coefficient |
| title | Errors and uncertainties in simulation of steady, viscous flow past a circular cylinder at Re = 20 using a systematic approach |
| title_full | Errors and uncertainties in simulation of steady, viscous flow past a circular cylinder at Re = 20 using a systematic approach |
| title_fullStr | Errors and uncertainties in simulation of steady, viscous flow past a circular cylinder at Re = 20 using a systematic approach |
| title_full_unstemmed | Errors and uncertainties in simulation of steady, viscous flow past a circular cylinder at Re = 20 using a systematic approach |
| title_short | Errors and uncertainties in simulation of steady, viscous flow past a circular cylinder at Re = 20 using a systematic approach |
| title_sort | errors and uncertainties in simulation of steady viscous flow past a circular cylinder at re 20 using a systematic approach |
| topic | numerical errors uncertainties circular cylinder grid independent solution domain independent solution drag coefficient |
| url | https://bulletin.incas.ro/files/seeni__rajendran_hussin_ismail__vol_12_iss_3.pdf |
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