[Modeling of decaying rotating turbulence]
The study presented in the present paper deals with the modeling of the rotation effects on a homogeneous turbulence evolving without a mean velocity gradient. The developed model results from a modification of the second order model of Haworth and Pope. This modification is expressed as a function of the rotation rate, of the component of the Reynolds tensor and of the characteristic length scale in the direction of the rotation axis. The obtained results have evidenced the great capacity of the present model to describe the rotation effects on the time evolution of the homogeneous decaying turbulence.
L'étude présentée dans cet article porte sur la modélisation des effets induits par la rotation sur une turbulence homogène évoluant sans gradient de vitesse moyenne. Le modèle développé est le résultat d'une modification du modèle au second ordre de Haworth et Pope. Cette modification est explicitée en fonction du taux de rotation Ω, de la composante du tenseur de Reynolds et de l'échelle caractéristique de longueur dans la direction de l'axe de rotation. Les résultats obtenus ont montré la grande capacité de la présente fermeture à décrire les effets induits par les forces de Coriolis dues à la rotation sur l'évolution temporelle de la turbulence en déclin.
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Keywords: Decaying turbulence, Rotation effects, Second-order closure model, Simulation
Zouaoui Jihene 1; Hamed Marzougui 1, 2; Taieb Lili 1
@article{CRMECA_2017__345_10_706_0, author = {Zouaoui Jihene and Hamed Marzougui and Taieb Lili}, title = {Mod\'elisation de la turbulence en d\'eclin avec rotation}, journal = {Comptes Rendus. M\'ecanique}, pages = {706--711}, publisher = {Elsevier}, volume = {345}, number = {10}, year = {2017}, doi = {10.1016/j.crme.2017.05.011}, language = {fr}, }
Zouaoui Jihene; Hamed Marzougui; Taieb Lili. Modélisation de la turbulence en déclin avec rotation. Comptes Rendus. Mécanique, Volume 345 (2017) no. 10, pp. 706-711. doi : 10.1016/j.crme.2017.05.011. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2017.05.011/
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