STRUCTURE AND FUNCTIONS OF THE CODE PACKAGE FOR SOLVING EQUATIONS OF STATE IN A LOCAL AREA NETWORK

L.V. Antonova, O.V. Verbitskaya, N.S. Dyadina, V.I. Legon´kov, V.I. Murashkina, V.R. Sokolov
VANT. Ser.: Mat. Mod. Fiz. Proc 1997. Вып.1. С. 41.

      The specialized code system EOS Package (equations of state of substances) is a part of a shared software, necessary for “physical support” of numerical experiments. It is intended to meet the requirements of code complexes concerning the description of thermal properties of substances. By now the EOS Package serves more than 10 complexes.
      The package satisfies the needs in calculations of thermodynamic functions of substances (TDF) and track length (TLF) functions for a wide class of problems, solving one- and two-dimensional hydrodynamics equations with heat conduction and other dissipative processes in one- and three-temperature approximation. The EOS Package can be used for solution of problems accounting for phase transitions and flow.
      The list of TDFs computed in the EOS Package by one or another EOS includes dozens of quantities and can be extended. Currently the Package contains 17 EOSs beginning with the ideal gas equation up to a wide-range equation of state.
      The TLF codes calculate the photon range lengths (Rosseland-averaged), heat conduction factor, their derivatives, as well as the ion and electron heat conduction for problems in three-temperature approximation. Currently the EOS Package contains 9 TLFs.
      The EOS Package is a specially organized set of multi-purpose EOS and TLF modules, data sets for them and service software, ensuring service and use of these objects in application codes. The Package is intended for service of codes, written in Fortran. It runs on a distributed computer network including BESM6, EC, Elbrus-2, Sun in different operating systems. In particular they are MS DOS, Windows, UNIX for IBM PC.
      In order to facilitate the interaction with the Package and to speed up the operation, window interfaces are implemented for its separate components in the form of interactive environments.
      There is an opportunity to add new functional objects to the Package. Practically every EOS or TLF code written as a Fortran subroutine can be included in the Package structure after small modification related to standard batch interface.