Validation reports

These reports show validation results produced with torch-flash. Experimental markers, model curves, parity plots, residual plots, and aggregate metrics are included where appropriate so the tested systems and model behavior remain visible.

The reports distinguish four kinds of evidence:

• validation compares a selected model and parameter set with experimental observations;
• verification checks equations against a published calculation or independently generated software reference; and
• calibration estimates model parameters from the displayed observations and does not count agreement with those same observations as independent validation; and
• application demonstrates a computed property, sensitivity, or model surface without claiming experimental agreement.

Available reports

• GERG-2008 and EOS-CG — measured compressibility factors and the complete EOS-CG Table 8 verification set.
• Native EOS-CG-2021 — dense CO2/H2 numerical verification plus experimental MDEA density and speed of sound.
• Native GERG-2008 for H2/CH4 — full density and isobaric-heat-capacity verification over the 1,010-state H2ThermoBank reference.
• Autodifferentiated thermal properties — CO2 and propane Joule-Thomson validation and homogeneous-state property profiles.
• Huron-Vidal mixing — phase diagrams, parity, and complete-temperature transfer for two alcohol/hydrocarbon binaries.
• Cubic volume translation — methane/n-decane density response for SRK and PR78 translations.
• Cross-co-volume interaction — before/after density fitting with a disjoint validation isotherm.
• Original UNIFAC — predictive alcohol/hydrocarbon phase diagrams and activity-coefficient behavior.
• Predictive Peng-Robinson 1978 — calibration-domain hydrocarbon VLE comparisons.
• H2-tailored GERG (2021) — Table 12 verification and reproductions of Figures 4, 7, and 16, including N2/H2 and CO2/H2 phase-equilibrium results.
• Hydrogen-water systems across applicable models — H2-H2O, H2-CO-H2O, and H2-N2-H2O composition parity and water-content curves, including the global 40-group E-PPR78 revision.
• E-PPR78 for CCS mixtures — all eight panels of Xu et al. Figure 2, including N2-CH4 phase behavior and mixing enthalpy plus N2-CO phase behavior.
• CO2 pre-salt phase behavior across applicable models — aggregate unfitted and fitted results for all 157 binary, ternary, and quaternary transition observations from Simoncelli et al. Tables 7-9.
• Trust-Region phase envelopes and phase identification — verification of Petitfrere-Nichita Figures 3 and 4 plus a comparison of all six physical phase-identification criteria.
• Transport properties — experimental viscosity and thermal-conductivity validation, source-factor and jointly calibrated Heavy Oil 5 curves, and surface/interfacial-tension and n-paraffin-diffusion applications.

Report traceability

Each report records the model identity, evidence class, conditions, units, solver acceptance criteria, quantitative metrics, and scientific limitations needed to interpret its torch-flash results. Published validation figures also have an entry in the figure manifest with their evidence class, source cell, inputs, and checksum.