Theory of mean poloidal flow generation by turbulence

• P. H. Diamond

  Department of Physics, University of California, San Diego, La Jolla, California 92093

• Y.-B. Kim

  Department of Physics, University of California, San Diego, La Jolla, California 92093

抄録

The mechanism for generation of mean poloidal flow by turbulence is identified and elucidated. Two methods of calculating poloidal flow acceleration are given and shown to yield predictions which agree. These methods link flow generation to the quasilinear radial current or the Reynolds stress 〈ṼrṼθ〉. It is shown that poloidal acceleration will occur if the turbulence supports radially propagating waves and if radial gradients in the turbulent Reynolds stress and wave energy density flux are present. In practice, these conditions are met in the tokamak edge region when waves propagate through the outermost closed flux surface or when convection cells with large radial correlation length are situated in steep gradient regions. The possible impact of these results on the theory of the L→H transition is discussed.

収録刊行物

• Physics of Fluids B: Plasma Physics

  Physics of Fluids B: Plasma Physics 3 (7), 1626-1633, 1991-07-01

  AIP Publishing

キーワード

• Fluid Flow and Transfer Processes
• General Physics and Astronomy
• Mechanics of Materials
• Condensed Matter Physics
• Computational Mechanics

詳細情報

• CRID: 1362544419255284224
• NII論文ID: 30015998583
• DOI: 10.1063/1.859681
• ISSN: 08998221
• Web Site: https://pubs.aip.org/aip/pfb/article-pdf/3/7/1626/12661511/1626_1_online.pdf
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