15.1.8 Postprocessing for Species Calculations

ANSYS FLUENT can report chemical species as mass fractions, mole fractions, and molar concentrations. You can also display laminar and effective mass diffusion coefficients. The following variables are available for postprocessing of species transport and reaction simulations:

• Mass fraction of species-n

• Mole fraction of species-n

• Molar Concentration of species-n

• Lam Diff Coef of species-n

• Eff Diff Coef of species-n

• Thermal Diff Coef of species-n

• Enthalpy of species-n (pressure-based solver calculations only)

• species-n Source Term (density-based solver calculations only)

• Relative Humidity

• Cell Time Scale (Eddy-Dissipation Concept and Laminar finite-rate stiff-chemistry only)

• Fine Scale Mass fraction of species-n (Eddy-Dissipation Concept model only)

• EDC Cell Volume Fraction (Eddy-Dissipation Concept model only)

• Fine Scale Temperature (Eddy-Dissipation Concept model only)

• Net Rate of species-n (Eddy-Dissipation Concept and Laminar finite-rate stiff-chemistry only)

• Kinetic Rate of Reaction-n

• Turbulent Rate of Reaction-n

• Liquid species mass fraction of species-n (solidification and melting model only)

• Heat of Reaction

These variables are contained in the Species..., Temperature..., and Reactions... categories of the variable selection drop-down list that appears in postprocessing dialog boxes. See Chapter  31 for a complete list of flow variables, field functions, and their definitions. Chapters  29 and 30 explain how to generate graphics displays and reports of data.

Averaged Species Concentrations

Averaged species concentrations at inlets and exits, and across selected planes (i.e., surfaces that you have created using the Surface menu items) within your model can be obtained using the Surface Integrals dialog box, as described in Section  30.6.

Reports Surface Integrals Set Up...

Select the Molar Concentration of species-n for the appropriate species in the Field Variable drop-down list.