Coherent Structure Formation through nonlinear interactions in 2D Magnetohydrodynamic Turbulence

Coherent Vorticity and Current Density Simulation of Magnetohydrodynamic Turbulence

Department of Computational Science and Engineering, Nagoya University, Nagoya, 464-8603, Japan Center for Computational Science, Graduate School of Engineering, Nagoya University, Nagoya, 464-8603, Japan JST, CREST, 5, Sanbancho, Chiyoda, Tokyo 102-0075, Japan M2P2–CNRS & CMI, Aix-Marseille Université, 39 rue Frédéric Joliot-Curie, 13453 Marseille Cedex 13, France LMD–IPSL–CNRS, Ecole Normale ...

Nonlinear interactions isolated through scale synthesis in experimental wall turbulence

An experimental investigation of nonlinear scale interactions in a forced turbulent boundary layer is presented here. A dynamic wall perturbation mechanism was used to externally force two distinct large-scale synthetic modes with well-defined spatial and temporal wave numbers in a fully turbulent flow. The focus is on characterizing the nonlinear flow response at triadically consistent wave nu...

Nonlinear closures for scale separation in supersonic magnetohydrodynamic turbulence

Turbulence in compressible plasma plays a key role inmany areas of astrophysics and engineering. The extreme plasma parameters in these environments, e.g. highReynolds numbers, supersonic and super-Alfvenic flows, however,make direct numerical simulations computationally intractable even for the simplest treatment—magnetohydrodynamics (MHD). To overcome this problemone can use subgrid-scale (SG...

Anisotropic fluxes and nonlocal interactions in magnetohydrodynamic turbulence.

We investigate the locality or nonlocality of the energy transfer and the spectral interactions involved in the cascade for decaying magnetohydrodynamic (MHD) flows in the presence of a uniform magnetic field B at various intensities. The results are based on a detailed analysis of three-dimensional numerical flows at moderate Reynolds numbers. The energy transfer functions, as well as the glob...

On coherent structure in wall turbulence