The interplay between sheared E × B mean flows and turbulence is reviewed while highlighting the common features observed in three different magnetic configurations: tokamak, stellarator and reversed field pinch. By comparing results from different experiments spanning a wide range of parameters, a universal relationship between the small scales of plasma turbulence and the large scales of the plasma mean flow is observed. In particular the generation of E × B flows by plasma turbulence in the edge region of fusion experiments is addressed by discussing the driving and damping action exerted by turbulence. In this context recent measurements of Reynolds stress and estimates of plasma viscosity are presented. The energy transfer from turbulence to mean flow is also addressed on presenting the latest experimental results. Finally the findings are discussed highlighting the elements supporting a turbulence self-regulation process.

Antoni, V., Spada, E., Vianello, N., Spolaore, M., Cavazzana, R., Serianni, G., et al. (2005). Shear flows generated by plasma turbulence and their influence on transport. PLASMA PHYSICS AND CONTROLLED FUSION, 47(12 B), B13-B23 [10.1088/0741-3335/47/12B/S02].

Shear flows generated by plasma turbulence and their influence on transport

Martines E
Ultimo
2005

Abstract

The interplay between sheared E × B mean flows and turbulence is reviewed while highlighting the common features observed in three different magnetic configurations: tokamak, stellarator and reversed field pinch. By comparing results from different experiments spanning a wide range of parameters, a universal relationship between the small scales of plasma turbulence and the large scales of the plasma mean flow is observed. In particular the generation of E × B flows by plasma turbulence in the edge region of fusion experiments is addressed by discussing the driving and damping action exerted by turbulence. In this context recent measurements of Reynolds stress and estimates of plasma viscosity are presented. The energy transfer from turbulence to mean flow is also addressed on presenting the latest experimental results. Finally the findings are discussed highlighting the elements supporting a turbulence self-regulation process.
Articolo in rivista - Articolo scientifico
sheared flow, plasma turbulence
English
B13
B23
11
Antoni, V., Spada, E., Vianello, N., Spolaore, M., Cavazzana, R., Serianni, G., et al. (2005). Shear flows generated by plasma turbulence and their influence on transport. PLASMA PHYSICS AND CONTROLLED FUSION, 47(12 B), B13-B23 [10.1088/0741-3335/47/12B/S02].
Antoni, V; Spada, E; Vianello, N; Spolaore, M; Cavazzana, R; Serianni, G; Martines, E
File in questo prodotto:
File Dimensione Formato  
066 - PPCF 05 shear flows.pdf

Solo gestori archivio

Tipologia di allegato: Publisher’s Version (Version of Record, VoR)
Dimensione 221.48 kB
Formato Adobe PDF
221.48 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/365578
Citazioni
  • Scopus 19
  • ???jsp.display-item.citation.isi??? 18
Social impact