Turbulent momentum transport due to neoclassical flows

Jungpyo Lee, Michael Barnes, Felix I. Parra, Emily Belli, Jeff Candy

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


Intrinsic toroidal rotation in a tokamak can be driven by turbulent momentum transport due to neoclassical flow effects breaking a symmetry of turbulence. In this paper we categorize the contributions due to neoclassical effects to the turbulent momentum transport, and evaluate each contribution using gyrokinetic simulations. We find that the relative importance of each contribution changes with collisionality. For low collisionality, the dominant contributions come from neoclassical particle and parallel flows. For moderate collisionality, there are non-negligible contributions due to neoclassical poloidal electric field and poloidal gradients of density and temperature, which are not important for low collisionality.

Original languageEnglish (US)
Article number125006
JournalPlasma Physics and Controlled Fusion
Issue number12
StatePublished - Oct 16 2015
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics


  • neoclassical flow
  • rotation
  • tokamak
  • turbulence


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