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  4. Interplay of turbulent transport and Reynolds stress in drift-wave turbulence
 
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2025
Journal Article
Title

Interplay of turbulent transport and Reynolds stress in drift-wave turbulence

Abstract
The dynamical interplay between turbulent particle transport and Reynolds stress at the edge of toroidal magnetically confined plasmas is experimentally investigated on the basis of the cross-coupling between density and potential fluctuations in drift-wave turbulence. Both and are found to be temporally anticorrelated, with a dynamical coupling of the density and potential fluctuations as an agent in their interplay. The density-potential coupling is shown for the first time to be dynamically related to the Reynolds stress in agreement with the vortex-tilting mechanism. Consistently, a temporal deterioration of the coupling links the evolution of particle transport to the drop in the Reynolds stress. Small-scale contributions are shown to play a key role via a mutual stabilization-destabilization process.
Author(s)
Sarkis, R.
Universität Stuttgart
Dumerat, N.
Universität Stuttgart
Schmid, B.
Universität Stuttgart
Tovar, Günter  
Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB  
Ramisch, M.
Universität Stuttgart
Journal
Physical Review. E  
DOI
10.1103/PhysRevE.111.045207
Language
English
Fraunhofer-Institut für Grenzflächen- und Bioverfahrenstechnik IGB  
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