A view of the latest experimental results and progress in the understanding of the role of poloidal flows driven by fluctuations via Reynolds stress is given. Reynolds stress shows a radial gradient close to the velocity shear layer location in tokamaks and stellarators, indicating that this mechanism may drive significant poloidal flows in the plasma boundary. Observation of the generation E x B sheared flows via Reynolds stress at the ion Bernstein resonance layer has been noticed in toroidal magnetized plasmas. The experimental evidence of sheared E x B flows linked to the location of rational surfaces in stellarator plasmas might be interpreted in terms of Reynolds stress sheared driven flows. These results show that E x B sheared flows driven by fluctuations can play an important role in the generation of transport barriers. © 2000 IOP Publishing Ltd.

Hidalgo, C., Pedrosa, M., Sanchez, E., Balbin, R., Lopez Fraguas, A., van Milligen, B., et al. (2000). Generation of sheared poloidal flows via Reynolds stress and transport barrier physics. PLASMA PHYSICS AND CONTROLLED FUSION, 42(5A), A153-A160 [10.1088/0741-3335/42/5A/316].

Generation of sheared poloidal flows via Reynolds stress and transport barrier physics

RICCARDI, CLAUDIA;FONTANESI, MARCELLO;
2000

Abstract

A view of the latest experimental results and progress in the understanding of the role of poloidal flows driven by fluctuations via Reynolds stress is given. Reynolds stress shows a radial gradient close to the velocity shear layer location in tokamaks and stellarators, indicating that this mechanism may drive significant poloidal flows in the plasma boundary. Observation of the generation E x B sheared flows via Reynolds stress at the ion Bernstein resonance layer has been noticed in toroidal magnetized plasmas. The experimental evidence of sheared E x B flows linked to the location of rational surfaces in stellarator plasmas might be interpreted in terms of Reynolds stress sheared driven flows. These results show that E x B sheared flows driven by fluctuations can play an important role in the generation of transport barriers. © 2000 IOP Publishing Ltd.
Articolo in rivista - Articolo scientifico
magnetoplasma; turbulence; Reynolds stress tensor; shear; anomalous transport
English
2000
42
5A
A153
A160
none
Hidalgo, C., Pedrosa, M., Sanchez, E., Balbin, R., Lopez Fraguas, A., van Milligen, B., et al. (2000). Generation of sheared poloidal flows via Reynolds stress and transport barrier physics. PLASMA PHYSICS AND CONTROLLED FUSION, 42(5A), A153-A160 [10.1088/0741-3335/42/5A/316].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/537
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