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Parallel closures and transport in the collisionless limit

Author: Jeong-Young Ji
Requested Type: Poster Only
Submitted: 2012-12-07 12:45:47

Co-authors: E.D.Held, H.Jhang

Contact Info:
Utah State University
UMC 4415, Old Main Hill
Logan, UT   84322
United States

Abstract Text:
Parallel closures/transport in the collisionless limit are obtained by solving the linearized drift kinetic equation (DKE) using the Fourier transform method. Closures for density, temperature, and flow velocity equations may replace Braginskii's parallel heat flow and viscosity [S. I. Braginskii, in Reviews of Plasma Physics, edited by M. A. Leontovich (Consultants Bureau, NewYork, 1965), vol. 1, p. 205] when collisions are negligible. Closures for density and temperature equations may replace Spitzer's transport relations [L. Spitzer, Jr. and R. Härm, Phys. Rev. 89, 977 (1953)]. It is also verified that the closures reproduce the exact linear response function for Landau damping given an ion temperature gradient [G. Hammett and F. W. Perkins (HP), Phys. Rev. Lett. 64, 3019 (1990)]. In contrast to the approximate closures (HP) where the vanishing viscosity coefficient numerically gives an exact response, our closures relate the heat flow and nonvanishing viscosity to temperature and flow gradients.

Characterization: 4.0


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