CAFE: A NEW RELATIVISTIC MHD CODE

Journal Article · Mon Jun 22 00:00:00 EDT 2015 · Astrophysical Journal, Supplement Series

DOI:https://doi.org/10.1088/0067-0049/218/2/24· OSTI ID:22520191

Lora-Clavijo, F. D.; Cruz-Osorio, A. ^[1]

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1. Instituto de Astronomía, Universidad Nacional Autónoma de México, AP 70-264, Distrito Federal 04510, México (Mexico)

We introduce CAFE, a new independent code designed to solve the equations of relativistic ideal magnetohydrodynamics (RMHD) in three dimensions. We present the standard tests for an RMHD code and for the relativistic hydrodynamics regime because we have not reported them before. The tests include the one-dimensional Riemann problems related to blast waves, head-on collisions of streams, and states with transverse velocities, with and without magnetic field, which is aligned or transverse, constant or discontinuous across the initial discontinuity. Among the two-dimensional (2D) and 3D tests without magnetic field, we include the 2D Riemann problem, a one-dimensional shock tube along a diagonal, the high-speed Emery wind tunnel, the Kelvin–Helmholtz (KH) instability, a set of jets, and a 3D spherical blast wave, whereas in the presence of a magnetic field we show the magnetic rotor, the cylindrical explosion, a case of Kelvin–Helmholtz instability, and a 3D magnetic field advection loop. The code uses high-resolution shock-capturing methods, and we present the error analysis for a combination that uses the Harten, Lax, van Leer, and Einfeldt (HLLE) flux formula combined with a linear, piecewise parabolic method and fifth-order weighted essentially nonoscillatory reconstructors. We use the flux-constrained transport and the divergence cleaning methods to control the divergence-free magnetic field constraint.

• OSTI ID: 22520191
• Journal Information: Astrophysical Journal, Supplement Series, Vol. 218, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0067-0049
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ADVECTION
C CODES
CYLINDRICAL CONFIGURATION
HELMHOLTZ INSTABILITY
MAGNETIC FIELDS
MAGNETOHYDRODYNAMICS
ONE-DIMENSIONAL CALCULATIONS
R CODES
RELATIVISTIC RANGE
SHOCK TUBES
SHOCK WAVES
SPHERICAL CONFIGURATION
STREAMS
TWO-DIMENSIONAL SYSTEMS
VELOCITY
WIND TUNNELS