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This repository presents the look-up table method to compute CO2 properties

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CO2 Look Up Table

This model is basically written by FORTRAN 90. It can compute the CO2 thermodynamic properties and transport porperties in liquid, gas, supercritical and liquid-gas two-phase states. The inputs are the density (specific volume) and the internal energy. This input choice is coherent with most of density-based flow solvers. More details refer to An Accurate and Efficient Look-up Table Equation of State for Two-Phase Compressible Flow Simulations of Carbon Dioxide


- Code organisation

- How to use


1. Code organisation

  • Original Span-Wagner EoS (thermodynamic properties):

    • helmholtz_deriv.f90
    • helmholtz_dimless.f90
    • deriv_disfonc.f90
    • deriv_expfonc.f90
    • Def_constants.f90
    • Properties.f90
    • saturation_curve.f90
    • Derivees.f90
  • Make look-up table:

    • Def_variables.f90
    • grid_construction_HT.f90
    • grid_construction_LH.f90
    • grid_construction_LL.f90
    • grid_construction_R.f90
    • grid_construction_TPH.f90
    • grid_construction_TPM.f90
    • grid_construction_TPL.f90
    • grid_functions.f90
    • interp_functions.f90
    • Grid.f90
    • Interp_table.f90
  • Root-finding solver:

    • non_linear_solvers.f90
    • axl_solvers.f90
    • solver_eos.f90
  • Transport properteis:

    • Transprop.f90
  • Test/evaluation cases:

    • program/

    2. How to use

    • Compliler: gfortran, lapack library, openblas library (Different version can lead divergence in some points during grid construction. To fix it, need adapt initial guess. You may find a clue in grid construction modules)

    • Test cases are in program file.

    • To couple to OpenFoam (C++ based) solver:

      • compile .f90 using Makefile ("make")
      • create .a library ("ar rc libco2lib.a *.o")
      • check library ("nm libco2lib.a")
      • compile .a library with OpenFOAM solver (setup Make/option in OpenFOAM solver)
    • Main Module:

    • Grid.f90 : construct table

    • Interp_table.f90 : use table to compute properties

    • Properties.f90 : use original SW EoS to compute properties

    • Transprop.f90 : compute transport properties

    • Derivees.f90 : compute derivatives of thermal variables

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This repository presents the look-up table method to compute CO2 properties

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