Comparison of a grid-based CFD method and vortex dynamics predictions of low Reynolds number cylinder flows
| Autor: | László Baranyi, R. I. Lewis |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Physics
020301 aerospace & aeronautics Drag coefficient Aerospace Engineering 02 engineering and technology Drag equation Mechanics Vortex shedding 01 natural sciences 010305 fluids & plasmas Physics::Fluid Dynamics symbols.namesake Flow separation Classical mechanics Skin friction drag 0203 mechanical engineering Parasitic drag Drag 0103 physical sciences symbols Strouhal number |
| Zdroj: | The Aeronautical Journal. 110:63-71 |
| ISSN: | 2059-6464 0001-9240 |
| DOI: | 10.1017/s0001924000004371 |
| Popis: | Computational fluid dynamics models range from the finite difference type grid-based method to the Lagrangian style vortex cloud simulation technique for solving the Navier-Stokes equations. This paper undertakes a comparison of these two methods for the classical datum bluff body case of flow past a stationary circular cylinder at low Reynolds numbers in the range 10 to 220. Comparisons include time-history, time-mean and root-mean-square values of oscillating drag and lift coefficients, frequency of vortex shedding and related vortex street wake flow patterns. Particularly close agreement was obtained for Strouhal number versus Reynolds number, and good agreement for time-mean value of drag coefficients; comparison was also made with experimental results. Attempts are also made to calculate the skin friction and surface pressure components of the cylinder drag, revealing the significance of skin friction drag within this range and its relative insignificance above a Reynolds number of 220. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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