# Dynamic anisotropy in MHD turbulence induced by mean magnetic field

## TL;DR

This study investigates how a large-scale magnetic field induces anisotropy in strong MHD turbulence, revealing inverse and forward energy cascades that shape the flow's structure and energy distribution.

## Contribution

It provides detailed analysis of anisotropic energy cascades in MHD turbulence under a strong magnetic field using direct numerical simulations.

## Key findings

- Inverse cascade of perpendicular velocity components leads to vortical structures.
- Strong magnetic field suppresses fluctuations along the magnetic field.
- Both inverse and forward cascades are characterized by anisotropic energy spectra and fluxes.

## Abstract

In this paper, we study the development of anisotropy in strong MHD turbulence in the presence of a large scale magnetic field B 0 by analyzing the results of direct numerical simulations. Our results show that the developed anisotropy among the different components of the velocity and magnetic field is a direct outcome of the inverse cascade of energy of the perpendicular velocity components u? and a forward cascade of the energy of the parallel component u k . The inverse cascade develops for a strong B0, where the flow exhibits a strong vortical structure by the suppression of fluctuations along the magnetic field. Both the inverse and the forward cascade are examined in detail by investigating the anisotropic energy spectra, the energy fluxes, and the shell to shell energy transfers among different scales.