| Autor: |
Briard, Antoine, Gomez, Thomas |
| Předmět: |
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| Zdroj: |
Physics of Fluids; 2016, Vol. 28 Issue 8, p1-7, 7p, 4 Graphs |
| Abstrakt: |
The mixed-derivative skewness Su? of a passive scalar field in high Reynolds and Prandtl numbers decaying homogeneous isotropic turbulence is studied numerically using eddy-damped quasi-normal Markovian closure, for Reλ ≥ 10³ up to Pr = 105. A convergence of Suθ for Pr ≥ 10³ is observed for any high enough Reynolds number. This asymptotic high Pr regime can be interpreted as a saturation of the mixing properties of the flow at small scales. The decay of the derivative skewnesses from high to low Reynolds numbers and the influence of large scales initial conditions are investigated as well. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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