NIRVANA+: An adaptive mesh refinement code for gas dynamics and MHD
1998; Elsevier BV; Volume: 109; Issue: 2-3 Linguagem: Inglês
10.1016/s0010-4655(98)00022-8
ISSN1879-2944
Autores Tópico(s)Advanced Numerical Methods in Computational Mathematics
ResumoA 2D Cartesian fully adaptive mesh refinement code for problems of gas dynamics and magnetohydrodynamics is presented. The code has been developed as a first step towards a future 3D version to enable fluid dynamical modeling of real-world problems presently beyond a numerical treatment. The refinement concept is based on the well-known strategy of multiple nested, successively refined, structured grid patches overlaid a fixed main grid. Adaptive grid technology is implemented in a numerical scheme which makes use of standard finite difference/finite volume formulations featuring global conservation of mass and the divergence-free magnetic field evolution with high accuracy. The performance of the new code NIRVANA+ is checked by hard test computations: the double Mach reflection problem of a strong shock, the circular advection of a current-carrying cylinder, and the dynamical evolution of a magnetohydrodynamic vortex.
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