Configure a Fluid Type
- Last UpdatedAug 01, 2025
- 2 minute read
You can set a Fluid Type's thermo type, parameters, starting values, methods, and components in the Fluid Editor.
Configure a Fluid Type
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Open the Fluid Editor for the Fluid Type.
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Expand the General section.

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Enter or modify the Fluid Type name and Description, if desired.
If you change the Fluid Type entry, you rename the Fluid Type.
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Select the Thermo Type so that the Fluid Type knows what fluid state equations or thermodynamic options to use.
The following table defines the different Thermo Types.
Thermo Type
Modeled with
Purpose
CarbonDioxide
External code
Supercritical CO2 based on Span‑Wagner.
See Configure single-component Fluid Types for more information on configuring Fluid Types of this Thermo Type.
Compositional
External code
General component mixtures.
See one of the following topics for more information on configuring Fluid Types of this Thermo Type:
FlareGas
Equations
Flare gases.
See Configure an equation-based Fluid Type for more information on configuring Fluid Types of this Thermo Type.
IdealGas
Equations
Ideal gases.
See Configure an equation-based Fluid Type for more information on configuring Fluid Types of this Thermo Type.
IncompressibleLiquid
Equations
Simple liquids.
See Configure an equation-based Fluid Type for more information on configuring Fluid Types of this Thermo Type.
IsomericHydrogen
External code
Mixtures of ortho- and para-hydrogen.
See Configure an isomeric hydrogen Fluid Type for more information on configuring Fluid Types of this Thermo Type.
Steam
External code
IF97 steam tables.
See Configure single-component Fluid Types for more information on configuring Fluid Types of this Thermo Type.
Wastewater
External code
Wastewater component mixtures with specialized wastewater reaction submodels.
See Configure a wastewater Fluid Type for more information on configuring Fluid Types of this Thermo Type.
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(Optional) Select the Hide in Model Library based on Role checkbox to hide the Fluid Type from Simulation Builders in the Model Library.
For information on referencing a Fluid Type in the Model Editor, see Create a Model Type that uses multiple Fluid Types in a single model instance.