Some predictions of the attached eddy model for a high Reynolds number boundary layer
| Autor: | S Hafez, T. B. Nickels, Nicholas Hutchins, Min S Chong, Ivan Marusic |
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| Rok vydání: | 2007 |
| Předmět: |
Hydrodynamic stability
General Mathematics General Engineering General Physics and Astronomy Reynolds number Magnetic Reynolds number Reynolds stress equation model Reynolds equation Physics::Fluid Dynamics symbols.namesake Boundary layer Reynolds decomposition symbols Statistical physics Reynolds-averaged Navier–Stokes equations Mathematics |
| Zdroj: | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences. 365:807-822 |
| ISSN: | 1471-2962 1364-503X |
| Popis: | Many flows of practical interest occur at high Reynolds number, at which the flow in most of the boundary layer is turbulent, showing apparently random fluctuations in velocity across a wide range of scales. The range of scales over which these fluctuations occur increases with the Reynolds number and hence high Reynolds number flows are difficult to compute or predict. In this paper, we discuss the structure of these flows and describe a physical model, based on the attached eddy hypothesis, which makes predictions for the statistical properties of these flows and their variation with Reynolds number. The predictions are shown to compare well with the results from recent experiments in a new purpose-built high Reynolds number facility. The model is also shown to provide a clear physical explanation for the trends in the data. The limits of applicability of the model are also discussed. |
| Databáze: | OpenAIRE |
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