NIFS-125

FULL TEXT (PDF, 652 KB)

Author(s):

H. Sugama and M. Wakatani

Title:

Statistical Analysis of Anomalous Transport in Resistive Interchange Turbulence

Date of publication:

Dec. 1991

Key words:

anomalous transport, two-scale direct-interaction approximation, resistive interchange turbulence, resistive MHD

Abstract:

A new anomalous transport model for resistive interchange turbulence is derived from statistical analysis applying two-scale direct-interaction approximation to resistive magnetohydrodynamic equations with a gravity term. Our model is similar to the K-epsilon model for eddy viscosity of turbulent shear flows in that anomalous transport coefficients are expressed in terms of by the turbulent kinetic energy K and its dissipation rate epsilon while K and epsilon are determined by transport equations. This anomalous transport model can describe some nonlocal effects such as those from boundary conditions which cannot be treated by conventional models based on the transport coefficients represented by locally determined plasma parameters.

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