Continuum self-organized-criticality model of turbulent heat transport in tokamaks.
A simple generic one-dimensional continuum model of driven dissipative systems is proposed to explain self-organized bursty heat transport in tokamaks. Extensive numerical simulations of this model reproduce many features of present day tokamaks such as submarginal temperature profiles, intermittent transport events, 1/f scaling of the frequency spectra, propagating fronts, etc. This model utilizes a minimal set of phenomenological parameters, which may be determined from experiments and/or simulations. Analytical and physical understanding of the observed features has also been attempted.
Tangri
Varun
V
Institute for Plasma Research, Bhat, Gandhinagar 382428, India.
Das
Amita
A
Kaw
Predhiman
P
Singh
Raghvendra
R