Developments of large eddy simulation for compressible space plasma turbulence

25th IUPAP Conference on Computational Physics

物理学;计算机科学

Chernyshov, A.A.^1 ; Karelsky, K.V.^1 ; Petrosyan, A.S.^1,2

Theoretical Section, Space Research Institute of Russian Academy of Sciences, 84/32 Profsoyuznaya, 117997, Moscow, Russia^1

Moscow Institute of Physics and Technology, State University, 9 Institutskii per., Dolgoprudny, Moscow Region 141700, Russia^2

关键词: Future trends;    Governing equations;    Incompressible turbulence;    Large Eddy simulation methods;    Magnetohydrodynamic turbulence;    Neutral fluids;    Small scale turbulence;    Sub-grid scale models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/510/1/012044/pdf
DOI  :  10.1088/1742-6596/510/1/012044

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

In this paper, brief review of studies of compressible space plasma turbulence is given. Magnetic fields and compressibility are present that are different from properties of hydrodynamic incompressible turbulence of neutral fluid. This considerably complicates studies of characteristics of compressible magnetohydrodynamic turbulence with direct numerical simulation. Large eddy simulation method developed as alternative of direct modeling is discussed in the review. The method is based on filtrating procedure of governing equations of magnetohydrodynamics and subgrid-scale modeling of universal small-scale turbulence. Descriptions of both the method and different subgrid-scale models for compressible magnetohydrodynamic turbulent flows are present. It is shown that large eddy simulation has good future trends for research of compressible magnetohydrodynamic turbulence.