Nonperturbative models of intermittency in edge turbulence

Journal Article · Mon Dec 15 00:00:00 EST 2008 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.3036932· OSTI ID:21259705

Anderson, Johan; Kim, Eun-jin ^[1]

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1. Department of Applied Mathematics, University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH (United Kingdom)

A theory of the probability distribution function (PDF) tails of the blob density in plasma edge turbulence is provided. A simplified model of the fast convective radial transport is used. The theoretically predicted PDF tails corroborate earlier measurements of edge transport, further confirming the strongly non-Gaussian feature of edge transport. It is found that increasing the cross-sectional spatial scale length (L{sub x} and L{sub y}) of the blob results in larger transport, whereas increasing the toroidal scale length (L{sub z}) decreases the PDF. The results imply that the PDF decreases for larger blob speed v{sub b}.

• OSTI ID: 21259705
• Journal Information: Physics of Plasmas, Vol. 15, Issue 12; Other Information: DOI: 10.1063/1.3036932; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOUNDARY LAYERS
CONVECTION
DISTRIBUTION FUNCTIONS
PLASMA
TURBULENCE