FLOW BEHIND BLUFF BODIES IN SIDE-BY-SIDE ARRANGEMENT
The present investigation deals with the shedding of vortices and flow interference between two circular cylinders in a side-by-side arrangement. Simulations are carried out using commercial Computational Fluid Dynamics (CFD) code FLUENT-6.2. The flow field around the cylinders is modeled in two-dim...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Taylor's University
2011-12-01
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| Series: | Journal of Engineering Science and Technology |
| Subjects: | |
| Online Access: | http://jestec.taylors.edu.my/Vol%206%20Issue%206%20December%2011/Vol_6_6_745_768_GOVARDHAN.pdf |
| _version_ | 1818772243118817280 |
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| author | PUNEESHWAR LAL VERMA M. GOVARDHAN |
| author_facet | PUNEESHWAR LAL VERMA M. GOVARDHAN |
| author_sort | PUNEESHWAR LAL VERMA |
| collection | DOAJ |
| description | The present investigation deals with the shedding of vortices and flow interference between two circular cylinders in a side-by-side arrangement. Simulations are carried out using commercial Computational Fluid Dynamics (CFD) code FLUENT-6.2. The flow field around the cylinders is modeled in two-dimensions with the axis of the cylinder perpendicular to the direction of flow. The cylinder is modeled as a circle and a square flow domain is created around the cylinder. The calculations are carried out on a quadrilateral mesh. The simulations are performed for a Reynolds number of 200. The mesh is finer close to the cylinder wall in order to have a better description of the boundary layer. Contours of vorticity, variation of lift and drag coefficients, force time histories are presented. A mean repulsive lift force exists between the cylinders and the lift force steadily decreases with increasing length to diameter ratio. For length to diameter ratio ≤ 2.0, flopping phenomenon is observed whereas for length to diameter ratio > 2.0, the lift fluctuation is synchronized and is in anti-phase. The results of the present work show that the drag coefficient is slightly higher for length to diameter ratio of 2.0. Beyond this ratio, the drag coefficient on either cylinder falls. For length to diameter ratio of 3.0 and 4.0, the power spectrum estimation of the lift coefficient shows a very distinctive peak at Strouhal number of 0.21. |
| first_indexed | 2024-12-18T10:06:15Z |
| format | Article |
| id | doaj.art-9535f7f51db54f138fa1125f8b023941 |
| institution | Directory Open Access Journal |
| issn | 1823-4690 |
| language | English |
| last_indexed | 2024-12-18T10:06:15Z |
| publishDate | 2011-12-01 |
| publisher | Taylor's University |
| record_format | Article |
| series | Journal of Engineering Science and Technology |
| spelling | doaj.art-9535f7f51db54f138fa1125f8b0239412022-12-21T21:11:33ZengTaylor's UniversityJournal of Engineering Science and Technology1823-46902011-12-0166745768FLOW BEHIND BLUFF BODIES IN SIDE-BY-SIDE ARRANGEMENTPUNEESHWAR LAL VERMAM. GOVARDHANThe present investigation deals with the shedding of vortices and flow interference between two circular cylinders in a side-by-side arrangement. Simulations are carried out using commercial Computational Fluid Dynamics (CFD) code FLUENT-6.2. The flow field around the cylinders is modeled in two-dimensions with the axis of the cylinder perpendicular to the direction of flow. The cylinder is modeled as a circle and a square flow domain is created around the cylinder. The calculations are carried out on a quadrilateral mesh. The simulations are performed for a Reynolds number of 200. The mesh is finer close to the cylinder wall in order to have a better description of the boundary layer. Contours of vorticity, variation of lift and drag coefficients, force time histories are presented. A mean repulsive lift force exists between the cylinders and the lift force steadily decreases with increasing length to diameter ratio. For length to diameter ratio ≤ 2.0, flopping phenomenon is observed whereas for length to diameter ratio > 2.0, the lift fluctuation is synchronized and is in anti-phase. The results of the present work show that the drag coefficient is slightly higher for length to diameter ratio of 2.0. Beyond this ratio, the drag coefficient on either cylinder falls. For length to diameter ratio of 3.0 and 4.0, the power spectrum estimation of the lift coefficient shows a very distinctive peak at Strouhal number of 0.21.http://jestec.taylors.edu.my/Vol%206%20Issue%206%20December%2011/Vol_6_6_745_768_GOVARDHAN.pdf Bluff bodiesCylindersNumerical simulationVorticesInterferenceLiftDragFlow separation |
| spellingShingle | PUNEESHWAR LAL VERMA M. GOVARDHAN FLOW BEHIND BLUFF BODIES IN SIDE-BY-SIDE ARRANGEMENT Journal of Engineering Science and Technology Bluff bodies Cylinders Numerical simulation Vortices Interference Lift Drag Flow separation |
| title | FLOW BEHIND BLUFF BODIES IN SIDE-BY-SIDE ARRANGEMENT |
| title_full | FLOW BEHIND BLUFF BODIES IN SIDE-BY-SIDE ARRANGEMENT |
| title_fullStr | FLOW BEHIND BLUFF BODIES IN SIDE-BY-SIDE ARRANGEMENT |
| title_full_unstemmed | FLOW BEHIND BLUFF BODIES IN SIDE-BY-SIDE ARRANGEMENT |
| title_short | FLOW BEHIND BLUFF BODIES IN SIDE-BY-SIDE ARRANGEMENT |
| title_sort | flow behind bluff bodies in side by side arrangement |
| topic | Bluff bodies Cylinders Numerical simulation Vortices Interference Lift Drag Flow separation |
| url | http://jestec.taylors.edu.my/Vol%206%20Issue%206%20December%2011/Vol_6_6_745_768_GOVARDHAN.pdf |
| work_keys_str_mv | AT puneeshwarlalverma flowbehindbluffbodiesinsidebysidearrangement AT mgovardhan flowbehindbluffbodiesinsidebysidearrangement |