A resistive extension for ideal magnetohydrodynamics

Autor:	Alex James Wright, Ian Hawke
Rok vydání:	2019
Předmět:	Physics Resistive touchscreen Fine-tuning Range (mathematics) Ideal (set theory) Dynamical systems theory Space and Planetary Science Astronomy and Astrophysics Mechanics Extension (predicate logic) Magnetohydrodynamics Order of magnitude
Zdroj:	Monthly Notices of the Royal Astronomical Society. 491:5510-5523
ISSN:	1365-2966 0035-8711
Popis:	We present an extension to the special relativistic, ideal magnetohydrodynamic (MHD) equations, designed to capture effects due to resistivity. The extension takes the simple form of an additional source term that, when implemented numerically, is shown to emulate the behaviour produced by a fully resistive MHD description for a range of initial data. The extension is developed from first principles arguments, and thus requires no fine-tuning of parameters, meaning it can be applied to a wide range of dynamical systems. Furthermore, our extension does not suffer from the same stiffness issues arising in resistive MHD, and thus can be evolved quickly using explicit methods, with performance benefits of roughly an order of magnitude compared to current methods.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::2f1681a60a63c7fbadc84d7b925541ac https://doi.org/10.1093/mnras/stz2779 Zobrazit plný text záznamu