Análisis estadístico de propiedades pseudo-locales en plasmas espaciales turbulentos mediante simulaciones numéricas

Abstract

In the space plasma environment, the turbulent cascade allows most of the energy that is dissipated on small scales, by various kinetic processes, to be transferred to these scales in a nearly collisionless environment. Understanding the characteristics of such dissipative mechanisms requires precise knowledge of the fluctuations that make energy available for small-scale conversion, since the different dissipation processes are triggered by fluctuations of a different physical nature. The pseudo-local properties of turbulent plasmas are estimated in this research work, by means of a heuristic proxy of the amount of local energy, which is based on the third-order momentum scaling law for Magnetohydrodynamic (MHD) turbulence, the well-known Yaglom-PolitanoPouquette law (YPP). In particular, the analysis of the local and global properties of turbulent plasmas in the two-dimensional domain was obtained as background to explore them in simulations of quasi-turbulent non-collision plasmas. The results show that the three-dimensional simulation does not comply with the YPP law, due to the early formation of a turbulent state. However, it will be verified that the threedimensional numerical code works correctly and is ready to be used in other three-dimensional or lower-dimensional simulations. The results also show the reliability of the algorithms developed in this research work, as well as the corresponding codes.