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Large eddy simulation of decaying magnetohydrodynamic turbulence with dynamic subgrid-modeling

Abstract : The numerical large eddy simulation (LES) technique is tested on decaying magnetohydrodynamic (MHD) turbulence. The LES approach allows for a strong reduction in computational cost compared to direct numerical simulations by modeling the effects of the smallest turbulent scales instead of computing them directly. Two small-scale models of eddy-viscosity type are presented for this purpose in combination with a procedure for the self-consistent calculation of the model parameters in the course of the simulation. The method is successfully tested by comparing the obtained results to a high-resolution direct numerical simulation of decaying three-dimensional MHD turbulence.
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Submitted on : Tuesday, February 6, 2018 - 2:29:55 PM
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Olivier Agullo, W.-C. Müller, B. Knaepen, D. Carati. Large eddy simulation of decaying magnetohydrodynamic turbulence with dynamic subgrid-modeling. Physics of Plasmas, American Institute of Physics, 2001, 8 (7), pp.3502. ⟨10.1063/1.1372337⟩. ⟨hal-01625879⟩



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