Effects of driving scale on astrophysical turbulence and a modified Chandrasekhar-Fermi method

11th International Conference on Numerical Modeling of Space Plasma Flows

Cho, Jungyeon^1

Department of Astronomy and Space Science, Chungnam National University, Daejeon, Korea, Republic of^1

关键词: Astrophysical fluids;    Computational domains;    Conventional approach;    Mean magnetic field;    Small scale;    Turbulence simulation;    Turbulence statistics;    Turbulent state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/837/1/012002/pdf
DOI  :  10.1088/1742-6596/837/1/012002

来源: IOP

【 摘 要 】

Many astrophysical fluids are in turbulent state. To maintain turbulence, energy must be injected into the fluid. In turbulence simulations, it is customary to drive the fluids on a scale comparable to the size of the computational domain. In this paper, we show how some statistics of turbulence, especially turbulence statistics projected on the plane of the sky, is changed when we do not follow the conventional approach. As an example of such a statistics, we discuss in detail how the Chandrasekhar-Fermi method is affected by the small-scale driving, which is a simple and powerful technique for estimating the strength of the mean magnetic field projected on the plane of the sky.