Computer Science – Performance
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aspc..406..243l&link_type=abstract
Numerical Modeling of Space Plasma Flows: ASTRONUM-2008 ASP Conference Series, Vol. 406, proceedings of the conference held 8-13
Computer Science
Performance
2
Scientific paper
We present a new unsplit staggered mesh (USM) magnetohydrodynamics (MHD) scheme for the solution of time evolving, multi-dimensional, compressible MHD flows which is implemented in the publicly available code suite, FLASH3. The implementation uses uniform or block adaptive mesh refinement (AMR) grids on a variety of parallel computing architectures. The scheme preserves the divergence-free constraint of the magnetic fields to machine accuracy by using staggered meshes. The USM scheme obtains second-order accuracy by adopting a new data reconstruction-evolution algorithm for solving the associated Riemann problem. In this data reconstruction-evolution step a set of multidimensional MHD terms proportional to ∇ \cdot B are explicitly included that maintain in-plane dynamics. The scheme also emphasizes accuracy and efficiency in calculating electric fields in a new modified electric field construction algorithm (MEC). We present two example applications for the USM scheme that demonstrate the excellent performance of the new solver.
Deane A. E.
Federrath Christoph
Lee Daehee
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