A pictorial model for turbulent transport due to electrostatic fluctuations

Julio J. Martinell and Maximino Mora

Physica A: Statistical Mechanics and its Applications, 1993, vol. 199, issue 3, 485-501

Abstract: We develop a model for the transport of charged particles due to the presence of fluctuating electrostatic fields, using an approach analogous to the one used for collisional transport, which provides a clear picture of this process. The fluctuations are assumed to be due to a turbulent spectrum of oscillations produced by some sort of small-scale instability in a plasma, although the procedure can also be applied to other systems. The method is employed to analyze a particular case of quasi-electrostatic turbulence where the relevant Fokker-Planck coefficients are computed in two different ways: (a) a numerical statistical procedure and (b) an analytical approximation for weak fields. When compared, the results of the two approaches agree with each other, and from them typical observable transport coefficients are calculated for different kinds of fluctuation spectra. The coefficients turn out to have the right qualitative behavior and are very sensitive to the form of the spectrum.

Date: 1993
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:199:y:1993:i:3:p:485-501

DOI: 10.1016/0378-4371(93)90063-A

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