AM06-19-010 解適合格子を用いた自己重力磁気流体力学による星形成シミュレーション(宇宙流体(2),一般講演)

概要

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A numerical simulation code with adaptive mesh refinement (AMR) is developed. This AMR code implements both of the magneto-hydrodynamics (MHD) and self-gravity so that protostellar collapse is reproduced with a high-resolution. The AMR code reproduces gravitational collapse of a molecular cloud core, of which size is 0.1pc, and formation of an extremely small protostar, of which size is the order of 1AU(=5×10^<-6>pc). The protostar as well as the cloud core are captured by the hierarchical AMR grids of levels 0 to 13, and this simulation shows extremely large dynamic range of the order of 10^6. Both the solvers of MHD and self-gravity exhibit the second order accuracy in time and space. This accuracy is achieved by means of conservation of numerical fluxes at interfaces between fine and coarse cells for the MHD and self-gravitational solvers. This paper also shows the implementation of the AMR code as well as numerical results.
2006-09-05