An oscillating Langevin antenna for driving plasma turbulence simulations

J. M. Tenbarge, G. G. Howes, W. Dorland, G. W. Hammett

Research output: Contribution to journalArticlepeer-review

49 Scopus citations

Abstract

A unique method of driving Alfvénic turbulence via an oscillating Langevin antenna is presented. This method of driving is motivated by a desire to inject energy into a finite domain numerical simulation in a manner that models the nonlinear transfer of energy from fluctuations in the turbulent cascade at scales larger than the simulation domain. The oscillating Langevin antenna is shown to capture the essential features of the larger scale turbulence and efficiently couple to the plasma, generating steady-state turbulence within one characteristic turnaround time. The antenna is also sufficiently flexible to explore both strong and weak regimes of Alfvénic plasma turbulence.

Original languageEnglish (US)
Pages (from-to)578-589
Number of pages12
JournalComputer Physics Communications
Volume185
Issue number2
DOIs
StatePublished - Feb 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • General Physics and Astronomy

Keywords

  • Langevin
  • Numerical methods
  • Plasma
  • Turbulence

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