6 papers · 1 filter
Impact of micro-scale stochastic Zonal Flows on the macro-scale V-RMHD modes
Sara Moradi, A. Thyagaraj
A model is developed to simulate micro-scale turbulence driven ZFs, and their impact on the MHD tearing and kink modes is examined. The model is based on a stochastic representatio…
Global scaling of the heat transport in fusion plasmas
Sara Moradi, Johan Anderson, Michele Romanelli +2
A global heat flux model based on a fractional derivative of plasma pressure is proposed for the heat transport in fusion plasmas. The degree of the fractional derivative of the he…
Non-Linear Langevin and Fractional Fokker-Planck Equations for Anomalous Diffusion by Levy Stable Processes
Johan Anderson, Sara Moradi, Tariq Rafiq
The~numerical solutions to a non-linear Fractional Fokker--Planck (FFP) equation are studied estimating the generalized diffusion coefficients. The~aim is to model anomalous diffus…
Phase dependent advection-diffusion in drift wave - zonal flow turbulence
Sara Moradi, Johan Anderson
In plasma turbulence theory, due to the complexity of the system with many non-linearly interacting waves, the dynamics of the phases is often disregarded and the so-called random-…
The role of phase dynamics in a stochastic model of a passively advected scalar
Sara Moradi, Johan Anderson
Collective synchronous motion of the phases is introduced in a model for the stochastic passive advection-diffusion of a scalar with external forcing. The model for the phase coupl…
Turbulence characteristics of electron cyclotron and ohmic heated discharges
Istvan Pusztai, Sara Moradi, Tunde Fulop +1
Turbulence characteristics of electron cyclotron (EC) and ohmic heated (OH) discharges has been analyzed by electrostatic gyrokinetic simulations with GYRO [J. Candy, R.E. Waltz, J…