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Title: Anisotropic energy transfers in quasi-static magnetohydrodynamic turbulence

We perform direct numerical simulations of quasi-static magnetohydrodynamic turbulence and compute various energy transfers including the ring-to-ring and conical energy transfers, and the energy fluxes of the perpendicular and parallel components of the velocity field. We show that the rings with higher polar angles transfer energy to ones with lower polar angles. For large interaction parameters, the dominant energy transfer takes place near the equator (polar angle θ≈(π)/2 ). The energy transfers are local both in wavenumbers and angles. The energy flux of the perpendicular component is predominantly from higher to lower wavenumbers (inverse cascade of energy), while that of the parallel component is from lower to higher wavenumbers (forward cascade of energy). Our results are consistent with earlier results, which indicate quasi two-dimensionalization of quasi-static magnetohydrodynamic flows at high interaction parameters.
Authors:
 [1] ;  [2] ;  [3]
  1. Department of Mechanical Engineering, Indian Institute of Technology, Kanpur 208016 (India)
  2. Theoretical Physics Division, Bhabha Atomic Research Centre, Mumbai 400 085 (India)
  3. Department of Physics, Indian Institute of Technology, Kanpur 208016 (India)
Publication Date:
OSTI Identifier:
22299669
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 21; Journal Issue: 10; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ANISOTROPY; COMPUTERIZED SIMULATION; ENERGY TRANSFER; TURBULENCE