On Anomalous Plasma Transport as a Wiener Process
Open Access
- 1 November 1983
- journal article
- Published by Walter de Gruyter GmbH in Zeitschrift für Naturforschung A
- Vol. 38 (11) , 1189-1196
- https://doi.org/10.1515/zna-1983-1104
Abstract
A recent theory by Molvig et al. on particle transport in turbulent fields with overlapping island structure is critically reviewed. An inconsistency in the derivation of the diffusion coefficient D from the assumption of a Wiener process is pointed out and corrected. In the region ΔΩ • τK ≪ 1 the results if properly interpreted are unchanged. For ΔΩ • τK ≪ 1 the results differ (ΔΩ = particle velocity/mode correlation length, τK = "randomization" time). Computer experiments are performed to support the critical argumentsKeywords
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