Cosmological AMR MHD with Enzo

Journal Article · Thu Jan 01 04:00:00 EST 2009 · Astrophysical Journal Supplement Series

OSTI ID:956354

Xu, Hao ^[1]; Li, Hui ^[1]; Li, Shengtai ^[1]

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1. Los Alamos National Laboratory

In this work, we present EnzoMHD, the extension of the cosmological code Enzoto include magnetic fields. We use the hyperbolic solver of Li et al. (2008) for the computation of interface fluxes. We use constrained transport methods of Balsara & Spicer (1999) and Gardiner & Stone (2005) to advance the induction equation, the reconstruction technique of Balsara (2001) to extend the Adaptive Mesh Refinement of Berger & Colella (1989) already used in Enzo, though formulated in a slightly different way for ease of implementation. This combination of methods preserves the divergence of the magnetic field to machine precision. We use operator splitting to include gravity and cosmological expansion. We then present a series of cosmological and non cosmologjcal tests problems to demonstrate the quality of solution resulting from this combination of solvers.

• Research Organization: Los Alamos National Laboratory (LANL)
• Sponsoring Organization: DOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 956354
• Report Number(s): LA-UR-09-00559; LA-UR-09-559
• Journal Information: Astrophysical Journal Supplement Series, Journal Name: Astrophysical Journal Supplement Series
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
IMPLEMENTATION
INDUCTION
MAGNETIC FIELDS
SIMULATION
TRANSPORT