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== Motivation == | == Motivation == | ||
| − | + | * Test avaiable subgrid scale (SGS) model | |
| + | * Test wall model on easy configuration: | ||
| + | ** no pressure gradients | ||
| + | ** cheap calculation | ||
| + | ** easy to mesh | ||
| + | ** ... | ||
| + | *Many DNS data base can be found (ex: the Kawmura laboratory [[http://murasun.me.noda.tus.ac.jp/turbulence/]]) to compare mean velocity and rms profiles | ||
== Testcase description == | == Testcase description == | ||
| Line 22: | Line 28: | ||
=== Simulation details === | === Simulation details === | ||
| + | ==== mesh generation ==== | ||
| − | We have | + | We have done the mesh with an automatic tool (*.m4) which is composed by <math>Nx \times Ny \times Nz = 50 \times 40 \times38</math>. |
| + | the mesh is composed by 4 blocks: | ||
| + | * 2 blocks for the first cell close to the wall. (Hense, y+ can be imposed) | ||
| + | * 2 blocks in the center | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | The Reynodls number of the flow it's the same as Abe et al. [3] [[http://murasun.me.noda.tus.ac.jp/turbulence/poi/text/Poi1020_4th_A_ver2.dat]] | + | The aim of my study is testing a posteriori near-wall law. We are running three cases : |
| + | |||
| + | * Without wall model | ||
| + | * With the Spalding law [1] | ||
| + | * With the Manhart et al. law [2] | ||
| + | |||
| + | The Reynodls number of the flow it's the same as Abe et al. [3] (<math> Re_{\tau} = 1020</math>)[[http://murasun.me.noda.tus.ac.jp/turbulence/poi/text/Poi1020_4th_A_ver2.dat]] | ||
== Numerical results == | == Numerical results == | ||
| Line 39: | Line 51: | ||
== References == | == References == | ||
| − | [1] Spalding, 1961, A single formula for the law of the wall, | + | [1] Spalding, 1961, A single formula for the law of the wall, J. 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. | [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. | ||
Revision as of 07:11, 4 June 2009
Olivier Brugiere, Universite Joseph Fourier, Grenoble, France
Contents
1 Motivation
- Test avaiable subgrid scale (SGS) model
- Test wall model on easy configuration:
- no pressure gradients
- cheap calculation
- easy to mesh
- ...
- Many DNS data base can be found (ex: the Kawmura laboratory [[1]]) to compare mean velocity and rms profiles
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
2.2.1 mesh generation
We have done the mesh with an automatic tool (*.m4) which is composed by 
.
the mesh is composed by 4 blocks:
- 2 blocks for the first cell close to the wall. (Hense, y+ can be imposed)
- 2 blocks in the center
The aim of my study is testing a posteriori near-wall law. We are running three cases :
- Without wall model
- With the Spalding law [1]
- With the Manhart et al. law [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, J. 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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