| PACKAGE ID: | 001388I600000 NIRAD |
| KWIC TITLE: | A Two-Dimensional Radiation Hydrodynamics Code |
| AUTHORS: | W. Hoebel; A. Ni; B. Goel |
| LIMITATION/AUDIENCE CODE: | UNL/UNL |
| COMPLETION DATE: | 03/10/2003 |
| PUBLICATION DATE: | 03/10/2003 |
| DESCRIPTION: | Calculation of compressible and high energetic hydrodynamic fields including photon transport and heat conduction in twodimensional curvilinear geometry. |
| PACKAGE CONTENTS: | Media Directory; Software Abstract; Information File, Media includes Source Code; Makefiles, EOS (EQUATION OF STATE) DATA FOR AL, AL Opacity Tables, Sample Problem Input and Output Date;/1 CD ROM |
| SOURCE CODE INCLUDED? | Y |
| MEDIA QUANTITY: | 1 |
| METHOD OF SOLUTION: | The analytical hydrodynamic equations are solved by a combined Lagrangean and Eulezian 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 Cit control. |
| COMPUTER: | IBM RS 6000 |
| OPERATING SYSTEMS: | Linux |
| SOFTWARE LIMITATIONS: | The underlying equation of state data library for the high temperature and pressure regime is restricted to aluminum only. The numerical accuracy is restricted by allocatable fast and disk storage. 6. TYPICAL RUNNING TIME - 388 cpu-seconds for a problem with a 20 by 20 mesh, 10 opacity groups and 1000 time steps on an IBM Rise 6000 and 174 seconds for the same problem on an 700 MHZ- PC with Linux. |
| RELATED SOFTWARE: | Results can easily be evaluated graphically with the TECPLOT software as this tool is able to represent arbitrary moving grids. |
| UNIQUE FEATURES: | a) Free streaming, fixed or syrmuetrical 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 lookup algorithm.
e) The multigroup and multiangle radiation equations are solved by a checker board band solver with cache optimisation. |
| 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
23 December 1996, Paris, ISBN 9264160205, pg 261272 |
| ABSTRACT STATUS: | Released As-Is 3/20/2003 |
| SPONSOR: | NEA |
| RESEARCH ORG: | NEA |
| PACKAGE TYPE: | AS-IS |
| PACKAGE STATUS: | RDY |