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Your search keyword '"Grandgirard, Virginie"' showing total 8 results
Start Over Author "Grandgirard, Virginie" Publisher iop publishing
8 results on '"Grandgirard, Virginie"'

2. Kinetic plasma-sheath self-organization

Author

Munschy, Yann, primary, Bourne, Emily, additional, Dif-Pradalier, Guilhem, additional, Donnel, Peter, additional, Ghendrih, Philippe, additional, Grandgirard, Virginie, additional, and Sarazin, Yanick, additional

Published
2024
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3. Role of avalanche transport in competing drift wave and interchange turbulence

Author

Ghendrih, Philippe, primary, Dif-Pradalier, Guilhem, additional, Panico, Olivier, additional, Sarazin, Yanick, additional, Bufferand, Hugo, additional, Ciraolo, Guido, additional, Donnel, Peter, additional, Fedorczak, Nicolas, additional, Garbet, Xavier, additional, Grandgirard, Virginie, additional, Hennequin, Pascale, additional, Serre, Eric, additional, and Tamain, Patrick, additional

Published
2022
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8. Structure of nonlocality of plasma turbulence

Author

Gürcan, Özgür, Vermare, Laure, Hennequin, Pascale, Berionni, Vincent, Diamond, P.H., Dif-Pradalier, G., Garbet, X., Ghendrih, Philippe, Grandgirard, Virginie, McDevitt, C.J., Morel, Pierre, Sarazin, Y., Storelli, A., Bourdelle, C., Tore Supra, Team, Laboratoire de Physique des Plasmas (LPP), Université Paris-Sud - Paris 11 (UP11)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Sorbonne Université (SU)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École polytechnique (X)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, K-epsilon turbulence model, Turbulence, Fisher equation, K-omega turbulence model, Mechanics, Condensed Matter Physics, 01 natural sciences, 010305 fluids & plasmas, [PHYS.PHYS.PHYS-PLASM-PH]Physics [physics]/Physics [physics]/Plasma Physics [physics.plasm-ph], 0103 physical sciences, Turbulence kinetic energy, Gyrokinetics, Group velocity, Statistical physics, 010306 general physics, Convection–diffusion equation
Abstract

International audience; Various indications on the weakly nonlocal character of turbulent plasma transport both from experimental fluctuation measurements from Tore Supra and observations from the full-f, flux-driven gyrokinetic code GYSELA are reported. A simple Fisher equation model of this weakly nonlocal dynamics can be formulated in terms of an evolution equation for the turbulent entropy density, which contains the basic phenomenon of radial turbulence spreading in addition to avalanche-like dynamics via coupling to profile modulations. A derivation of this model, which contains the so-called beach effect, a diffusive and convective flux components for the flux of turbulence intensity, in addition to linear group propagation is given, starting from the drift-kinetic equation. The proposed model has the form of a transport equation for turbulence intensity, and may be considered as an addition to transport modelling. The kinetic fluxes given, can be computed using model closures, or local gyrokinetics. The model is also used in a particular setup that represents the near edge region as a relatively stable zone between the core and edge region where the energy injection is locally more substantial. It is observed that with constant, physical coefficients, the model gives a convincing qualitative profile of fluctuation intensity when the turbulence is coming from the core region with either a group velocity or a convective flux.

Published
2013
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