NEA-1635 NIRAD.
NIRAD, A Two-Dimensional Radiation Hydrodynamics Code
NAME OR DESIGNATION OF PROGRAM, COMPUTER, PROBLEM SOLVED, METHODS, RESTRICTIONS ON THE COMPLEXITY OF THE PROBLEM, TYPICAL RUNNING TIME, UNUSUAL FEATURES, RELATED OR AUXILIARY PROGRAMS, STATUS, REFERENCES, HARDWARE REQUIREMENTS, LANGUAGE, OPERATING SYSTEM, OTHER RESTRICTIONS, NAME AND ESTABLISHMENT OF AUTHORS, MATERIAL, CATEGORIES
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| Program name | Package id | Status | Status date |
|---|---|---|---|
| NIRAD | NEA-1635/01 | Tested | 16-NOV-2001 |
Machines used:
| Package ID | Orig. computer | Test computer |
|---|---|---|
| NEA-1635/01 | IBM RISC6000 WS | PC Pentium III,Linux-based PC |
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4. METHODS
The analytical hydrodynamic equations are solved by a combined Lagrangean and Eulerian approximation applying Godunov method and finite volume technique. The space angle dependent photon equation is treated similar to the neutron transport equation using a set of predefined space angles and a multigroup structure of opacity data. The timestep size is adapted by CFL control.
The analytical hydrodynamic equations are solved by a combined Lagrangean and Eulerian approximation applying Godunov method and finite volume technique. The space angle dependent photon equation is treated similar to the neutron transport equation using a set of predefined space angles and a multigroup structure of opacity data. The timestep size is adapted by CFL control.
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7. UNUSUAL FEATURES
a) Free streaming, fixed or symmetrical boundary conditions may be imposed on the fluid equations.
b) Incoming radiative flux, relecting or mirror symmetrical boundary conditions for the radiation field can be treated.
c) Complex subregions with different physical properties can be constructed by superposition of single quadrangles.
d) Density and temperature dependent opacity tables with many frequency groups can be used and interpolated with an effective table look-up algorithm.
e) The multi-group and multi-angle radiation equations are solved by a checker board band solver with cache optimisation.
a) Free streaming, fixed or symmetrical boundary conditions may be imposed on the fluid equations.
b) Incoming radiative flux, relecting or mirror symmetrical boundary conditions for the radiation field can be treated.
c) Complex subregions with different physical properties can be constructed by superposition of single quadrangles.
d) Density and temperature dependent opacity tables with many frequency groups can be used and interpolated with an effective table look-up algorithm.
e) The multi-group and multi-angle radiation equations are solved by a checker board band solver with cache optimisation.
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NEA-1635/01, included references:
- W.Hoebel, B.Goel, A.L. Ni, H.Marten:Energy Transport in Matter with Rapidely Changing States,
NSE, 2000
- W.Hoebel, A.L. Ni:
Godunov-Like Scheme for two-Dimensional Computation,
Proc. Seminar on 3D Deterministic Transport Computer Programs,
Features, Applications and Perspectives
2-3 December 1996, Paris, ISBN 92-64-16020-5, pg 261-272
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NEA-1635/01
NIRAD source and makefilesEOS (equation of state) data for AL
AL Opacity tables
Sample problem input
Sample problem output
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- F. Space - Time Kinetics, Coupled Neutronics - Hydrodynamics - Thermodynamics
- G. Radiological Safety, Hazard and Accident Analysis
Keywords: hydrodynamics, radiation, transport, two-dimensional.