Turbulent magnetic pressure instability in stratified turbulence
Koen Kemel, Axel Brandenburg, Nathan Kleeorin, Igor Rogachevskii
TL;DR
This paper investigates the turbulent magnetic pressure instability in stratified turbulence, analyzing mean-field parameters to understand the conditions under which large-scale structures form, addressing previous discrepancies between simulations.
Contribution
It provides a detailed analysis of mean-field parameter dependencies to clarify the conditions for magnetic pressure instability in stratified turbulence.
Findings
Reduction of turbulent pressure observed in simulations
Large-scale structure formation depends on specific parameter regimes
Clarifies discrepancies between different simulation approaches
Abstract
A reduction of total mean turbulent pressure due to the presence of magnetic fields was previously shown to be a measurable effect in direct numerical simulations. However, in the studied parameter regime the formation of large-scale structures, as anticipated from earlier mean-field simulations, was not found. An analysis of the relevant mean-field parameter dependency and the parameter domain of interest is conducted in order to clarify this apparent discrepancy.
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