Direct Numerical Simulation of Turbulent Separated Flow and Heat Transfer Over a Blunt Flat Plate
| Autor: | Hideki Yanaoka, Hiroyuki Yoshikawa, Terukazu Ota |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Physics
Turbulence Mechanical Engineering Flow (psychology) Direct numerical simulation Reynolds number Mechanics Condensed Matter Physics Vortex shedding Vortex Physics::Fluid Dynamics symbols.namesake Flow separation Classical mechanics Mechanics of Materials Heat transfer symbols General Materials Science |
| Zdroj: | Journal of Heat Transfer. 125:779-787 |
| ISSN: | 1528-8943 0022-1481 |
| DOI: | 10.1115/1.1597623 |
| Popis: | Three-dimensional simulation of turbulent separated and reattached flow and heat transfer over a blunt flat plate is presented. The Reynolds number analyzed is 5000. The vortices shed from the reattachment flow region exhibit a hairpin-like structure. These large-scale vortex structures greatly influence the heat transfer in the reattachment region. Present results are compared with the previous three-dimensional calculations at low Reynolds number and it is found that there is no essential difference between two results with respect to the flow structure. The reattachment length is about five plate thicknesses, which is nearly equal to the previous experimental ones. The velocity distributions and turbulence intensities are in good agreement with the experimental data. Further, it is clarified that Nusselt number and temperature distributions greatly depend upon the Reynolds number, though their characteristic behaviors are qualitatively well simulated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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