Zonal Flow Patterns: How Toroidal Coupling Induces Phase Jumps and Shear Layers

TL;DR

This paper introduces a novel frequency modulation mechanism driven by magnetic toroidicity that explains zonal flow pattern formation and phase jumps without turbulence inhomogeneity.

Contribution

It presents a new model linking magnetic toroidicity to zonal flow patterns and phase dynamics, advancing understanding of flow formation mechanisms.

Findings

Global phase dynamics influence flow structure

Flow patterns can form without turbulence inhomogeneity

Model predicts flow strength distribution and spatial scales

Abstract

A new, frequency modulation mechanism for zonal flow pattern formation is presented. The model predicts the probability distribution function of the flow strength as well as the evolution of the characteristic spatial scale. Magnetic toroidicity-induced global phase dynamics is shown to determine the spatial structure of the flow. A key result is the observation that global phase patterning can lead to zonal flow formation in the absence of turbulence inhomogeneity.