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Before start a study on a complex geometry you can test your subgrid scale (SGS) model or your near wall low on a channel flow. You don't have a pressure gradient and it's very ease to test something on this kind of flow. You can find many DNS data base like the DNS form the Kawmura laboratory [[http://murasun.me.noda.tus.ac.jp/turbulence/]]. You can compare your mean velocity profile and the rms velocity with the data base. | Before start a study on a complex geometry you can test your subgrid scale (SGS) model or your near wall low on a channel flow. You don't have a pressure gradient and it's very ease to test something on this kind of flow. You can find many DNS data base like the DNS form the Kawmura laboratory [[http://murasun.me.noda.tus.ac.jp/turbulence/]]. You can compare your mean velocity profile and the rms velocity with the data base. | ||
Revision as of 12:42, 29 May 2009
Olivier Brugiere, Universite Joseph Fourier, Grenoble, France
Contents
1 Motivation
Before start a study on a complex geometry you can test your subgrid scale (SGS) model or your near wall low on a channel flow. You don't have a pressure gradient and it's very ease to test something on this kind of flow. You can find many DNS data base like the DNS form the Kawmura laboratory [[1]]. You can compare your mean velocity profile and the rms velocity with the data base.
2 Testcase description
2.1 Flow configuration
2.1.1 Geometrical Parameters
- Streamwise distance :
- Normal wall heigh :
- Spanwise distance :
2.1.2 Boundary condition
- Streamwise condition : periodicity
- Spanwise condition : periodicity
- Normal to streamwise : two walls
2.2 Simulation details
We have make the geometry with canalrectangulaireperiodic.m4 and the mesh is composed by .
The aim of my study is testing a posteriori near-wall low. To compare we are running three cases :
- With near-wall low
- With the Spalding Low [1]
- With the Mahart et al. low [2]
The Reynodls number of the flow it's the same as Abe et al. [3] [[2]]
3 Numerical results
4 References
[1] Spalding, 1961, A single formula for the law of the wall, Jl. Appl. Mech., vol 28, pp. 455-457
[2] Manhart Peller and Brun, 2008, Near-wall scaling for turbulent boundary layers with adverse pressure gradient, Theor. Comput. Fluid Dyn., vol 22 , pp. 243-260.
[3] Abe, Kawamura and Matsuo, Surface heat-flux fluctuations in a turbulent channel flow up to with Pr = 0,025 and 0,71, 2004, Int. J. Heat and Fluid Flow, vol 25, pp. 404-419.
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