小特集 「プラズマの非局所輸送現象と様々な構造形成」
プラズマの非局所輸送現象と様々な構造形成 3.宇宙プラズマにおける非局所性と構造の形成
2002 年 78 巻 9 号 p. 871-877
詳細
2002 年 78 巻 9 号 p. 871-877
Nonlocal transports of energy and angular momentum in a strophysical rotating plasmas are studied by global three-dimensional magnetohydrodynamic simulations. When the plasma torus rotating around a gravitating object is threaded by large-scale vertical magnetic fields, a bipolar jet emanates from the surface of the torus. Angular momentum extraction by these jets enhances the accretion of the torus material. Magnetic turbulence generated by the magneto-rotational instability also efficiently transports angular momentum outward. Direct numerical simulations enable us to study the evolution of the cosmic plasma torus with out assuming phenomenological viscosity.
