Title | Scale dependence of energy transfer in turbulent plasma |
Authors | Yang, Yan Wan, Minping Matthaeus, William H. Sorriso-Valvo, Luca Parashar, Tulasi N. Lu, Quanming Shi, Yipeng Chen, Shiyi |
Affiliation | Southern Univ Sci & Technol, Shenzhen 518055, Guangdong, Peoples R China Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China Univ Delaware, Newark, DE 19716 USA Nanotec CNR, Cubo 31C, I-87036 Arcavacata Di Rende, Italy Escuela Polotecn Nacl, Dept Fis, Quito 170517, Ecuador Peking Univ, Beijing 100871, Peoples R China |
Keywords | MHD plasmas turbulence solar wind |
Issue Date | 2019 |
Publisher | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
Abstract | In the context of space and astrophysical plasma turbulence and particle heating, several vocabularies emerge for estimating turbulent energy dissipation rate, including KolmogorovYaglom third-order law and, in its various forms, j . E (work done by the electromagnetic field on particles), and - (P . del) . u (pressure-strain interaction), to name a couple. It is now understood that these energy transfer channels, to some extent, are correlated with coherent structures. In particular, we find that different energy dissipation proxies, although not point-wise correlated, are concentrated in proximity to each other, for which they decorrelate in a few ion inertial scales. However, the energy dissipation proxies dominate at different scales. For example, there is an inertial range over which the third-order law is meaningful. Contributions from scale bands stemming from scale-dependent spatial filtering show that the energy exchange through j . E mainly results from large scales, while the energy conversion from fluid flow to internal through - (P . del) . u dominates at small scales. |
URI | http://hdl.handle.net/20.500.11897/550892 |
ISSN | 0035-8711 |
DOI | 10.1093/mnras/sty2977 |
Indexed | SCI(E) EI |
Appears in Collections: | 待认领 |