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Energy transfer channels and turbulence cascade in Vlasov-Maxwell turbulence

Yan Yang, W. H. Matthaeus, T. N. Parashar, P. Wu, M. Wan, Y. Shi, S. Chen, V. Roytershteyn, and W. Daughton
Phys. Rev. E 95, 061201(R) – Published 29 June 2017

Abstract

Analysis of the Vlasov-Maxwell equations from the perspective of turbulence cascade clarifies the role of electromagnetic work, and reveals the importance of the pressure-strain relation in generating internal energy. Particle-in-cell simulation demonstrates the relative importance of the several energy exchange terms, indicating that the traceless pressure-strain interaction “Pi-D” is of particular importance for both electrons and protons. The Pi-D interaction and the second tensor invariants of the strain are highly localized in similar spatial regions, indicating that energy transfer occurs preferentially in coherent structures. The collisionless turbulence cascade may be fruitfully explored by study of these energy transfer channels, in addition to examining transfer across spatial scales.

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  • Received 30 January 2017
  • Revised 28 March 2017

DOI:https://doi.org/10.1103/PhysRevE.95.061201

©2017 American Physical Society

Physics Subject Headings (PhySH)

Plasma Physics

Authors & Affiliations

Yan Yang1,2, W. H. Matthaeus2, T. N. Parashar2, P. Wu2,3, M. Wan4, Y. Shi1, S. Chen1,4, V. Roytershteyn5, and W. Daughton6

  • 1State Key Laboratory for Turbulence and Complex Systems, Center for Applied Physics and Technology, College of Engineering, Peking University, Beijing 100871, China
  • 2Bartol Research Institute and Department of Physics and Astronomy, University of Delaware, Newark, Delaware 19716, USA
  • 3School of Mathematics and Physics, Queen's University Belfast, BT7 1NN, United Kingdom
  • 4Department of Mechanics and Aerospace Engineering, South University of Science and Technology of China, Shenzhen, Guangdong 518055, China
  • 5Space Science Institute, Boulder Colorado 80301, USA
  • 6Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA

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Issue

Vol. 95, Iss. 6 — June 2017

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