ORBEOS: A spherical, fully multidimensional fluxcorrected transporthydrodynamics code
Abstract
The ORBEOS is a two dimensional (rtheta), Eulerian hydrodynamics code with tabular equation of state (EOS), that uses a fully multidimensional flux corrected transport algorithm to solve the fluid equations. This flux corrected transport (FCT) algorithm, is Cartesian and accurate to any desired order in space and to second order in time. The algorithm used in ORBEOS was modified for spherical geometry and is accurate in space to fourth order. Although this algorithm has been used before to solve the continuity equation, it is used in ORBEOS for the first time as the basic algorithm in a full hydrocode. The physical equations solved in the code and their finite difference representations are described, and it is shown why the fully miltidimensional algorithm better represents incompressible flows and does not lead to virtual sources as does the older one dimensional FCT algorithm using strange type time step differencing to handle multidimensional problems. Several test problems are presented and discussed.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 July 1981
 Bibcode:
 1981STIN...8132443S
 Keywords:

 Compressible Flow;
 Equations Of State;
 Hydrodynamics;
 Algorithms;
 Finite Difference Theory;
 Incompressible Flow;
 Fluid Mechanics and Heat Transfer