Threshold Heat-Flux Reduction by Near-Resonant Energy Transfer

TitleThreshold Heat-Flux Reduction by Near-Resonant Energy Transfer
Publication TypeJournal Article
Year of Publication2021
AuthorsP.W. Terry, P.Y. Li, M.J. Pueschel, G.G. Whelan
JournalPhysical Review Letters
Volume126
Issue2
Pagination025004
Date Published01/2021
Abstract

Near-resonant energy transfer to large-scale stable modes is shown to reduce transport above the linear critical gradient, contributing to the onset of transport at higher gradients. This is demonstrated for a threshold fluid theory of ion temperature gradient turbulence based on zonal-flow-catalyzed transfer. The heat flux is suppressed above the critical gradient by resonance in the triplet correlation time, a condition enforced by the wave numbers of the interaction of the unstable mode, zonal flow, and stable mode.

DOI10.1103/PhysRevLett.126.025004
Division

FP

Department

PMT

PID

50191b5a7c21a3dbb114504fc1a9e744

Alternate TitlePhys. Rev. Lett.

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