Abstract : We present a three-pronged numerical approach to the dynamo problem at low magnetic Prandtl numbers PM . The difficulty of resolving a large range of scales is circumvented by combining direct numerical simulations, a Lagrangian-averaged model and large-eddy simulations. The flow is generated by the Taylor-Green forcing; it combines a well defined structure at large scales and turbulent fluctuations at small scales. Our main findings are (i) dynamos are observed from PM ≈
https://hal-ens-lyon.archives-ouvertes.fr/ensl-00180691
Contributeur : Jean-François Pinton
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Soumis le : vendredi 19 octobre 2007 - 17:00:52
Dernière modification le : mardi 29 mai 2018 - 12:50:37
Document(s) archivé(s) le : vendredi 25 novembre 2016 - 16:49:22
Yannick Ponty, Pablo Mininni, David Montgomery, Jean-François Pinton, Hélène Politano, et al.. Numerical Study of Dynamo Action at Low Magnetic Prandtl Numbers. Physical Review Letters, American Physical Society, 2005, pp.164502. 〈ensl-00180691〉
