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O N the Flow past a Circular Cylinder from Critical to Supercritical R Eynolds Numbers : W Ake Topology and Vortex Shedding
| Content Provider | Semantic Scholar |
|---|---|
| Author | Shedding, Vortex Rodrı́guez, I. Lehmkuhl, Oriol Chiva, Josep Maria Sánchez Borrell, Ricard Oliva, Alberto |
| Copyright Year | 2014 |
| Abstract | The flow past a circular cylinder at critical and supercritical Reynolds number combines flow separation, turbulence transition, reattachment of the flow and further turbulent separation of the boundary layer. The transition to turbulence causes the delaying of the separation point and, an important reduction of the drag force on the cylinder surface. In the present work, large-eddy simulations of the flow past a circular cylinder at Reynolds numbers in the range 2.5 × 108.5× 10 are performed. In this range, major changes in the pressure distribution occur, the pressure minimum gets more negative as its location moves towards the cylinder rear, whereas the base pressure increases. These changes are shown to take place first on one side of the cylinder and then on the other side as the drag completes its drop up to a minimum value of ∼0.23, registered at Re = 6.5 × 10 in this work. After that, the flow enters in the supercritical regime, with little changes in the wake configuration. Furthermore, these changes in the wake topology as the Reynolds number increases are also shown to be related to the increase in the vortex shedding frequency. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://upcommons.upc.edu/bitstream/handle/2117/85914/paper_submission.pdf;jsessionid=FD86C53723610816A685277E43A22007?sequence=1 |
| Alternate Webpage(s) | https://upcommons.upc.edu/bitstream/handle/2117/24446/ETMM10_Rodriguez_paper.pdf;jsessionid=9C6F0324412B32F0DD8247CE180FDEF0?sequence=1 |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Anatomy, Regional Coefficient Coherence (physics) Cylinder seal Cylinder-head-sector Mental Suffering Occur (action) Registration Reynolds-averaged Navier–Stokes equations Simulation Turbulence Vortex Wake-on-LAN anatomical layer |
| Content Type | Text |
| Resource Type | Article |
