Explicit adaptive-grid radiation-magnetohydrodynamics

Journal Article · Sun Mar 01 04:00:00 EST 1992 · Journal of Computational Physics; (United States)

DOI:https://doi.org/10.1016/0021-9991(92)90308-L· OSTI ID:7116405

Yasar, O; Moses, G A ^[1]

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1. Univ. of Wisconsin, Madison, WI (United States)

An explicit adaptive-grid finite differencing method for one-dimensional radiation-magnetohydrodynamics computations is described. Based on the equidistribution principle, this explicit procedure moves the grid points to regions with high spatial gradients in physical quantities, such as temperature, mass density, pressure, and momentum. The governing magnetic field, radiative transfer, and hydrodynamics equations are transformed to the moving adaptive reference frame. The time and spatially dependent radiation field is determined by solving the radiative transfer equation with the multigroup discrete ordinate S[sub N] method with implicit time differencing. The magnetic field is solved through a diffusion equation resulted from Maxwell's equations and Ohm's law. The field equations are solved using a first-order upwind spatial differencing and explicit time differencing scheme. The coupling between the fluid and radiation field is treated explicitly by first solving for the radiation field and then the fluid equations. A conservation differencing scheme based on the control volume approach is chosen to retain the conservative nature of the governing equations. 26 refs., 14 figs., 3 tabs.

• OSTI ID: 7116405
• Journal Information: Journal of Computational Physics; (United States), Journal Name: Journal of Computational Physics; (United States) Vol. 100:1; ISSN JCTPAH; ISSN 0021-9991
• Country of Publication: United States
• Language: English

Related Subjects

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CALCULATION METHODS
COMPUTERIZED SIMULATION
DIFFERENTIAL EQUATIONS
EQUATIONS
FINITE DIFFERENCE METHOD
FLUID MECHANICS
HYDRODYNAMICS
ITERATIVE METHODS
MAGNETOHYDRODYNAMICS
MAXWELL EQUATIONS
MECHANICS
MESH GENERATION
NUMERICAL SOLUTION
PARTIAL DIFFERENTIAL EQUATIONS
SIMULATION