Evolution of Three-dimensional Coherent Structures in Hall Magnetohydrodynamics
نویسندگان
چکیده
Abstract This work extends the computational model EULAG-MHD to include Hall magnetohydrodynamics (HMHD)—important explore physical systems undergoing fast magnetic reconnection at order of ion inertial length scale. Examples solar transients along with reconnections in magnetosphere, magnetotail, and laboratory plasmas. The paper documents results two distinct sets implicit large-eddy simulations presence absence forcing term, initiated an unidirectional sinusoidal field. HMHD simulation while benchmarking code also emphasizes complexity three-dimensional (3D) evolution over its two-dimensional counterpart. onset significantly earlier HMHD. Importantly, field generated by term breaks any inherent symmetry, ultimately making 3D. resulting 3D develop flux ropes (MFRs) tubes. Projected on plane, tubes appear as islands, which later break into secondary finally coalesce generate X-type neutral point. These findings are agreement theory contemporary HMHD, thus verify our extension model. second set explores influence generation ascend MFR from sheared arcades—a novel scenario instructive understanding coronal transients. rope evolves through intermediate complex structures, breaking locally because reconnections. Interestingly, breakage occurs signifying faster dynamics leading topology favorable for
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2021
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/abc8f7