This node defines the material properties of the fluid of the Fracture parent node. The fluid can be specified as general gas or liquid or as an ideal gas.
The available options for the Fluid type are
Gas/Liquid (default) or
Ideal gas. The selection determines how the density and compressibility of the fluid are set. The latter is only required if a linearized storage model has been selected in the parent
Fracture node. For all fluid types specify the dynamic viscosity
μ (SI unit: Pa·s).
This option specifies the Density and the
Compressibility for a general gas or liquid.
For Ideal gas it uses the ideal gas law to describe the fluid. In this case, specify the thermodynamics properties. Select a
Gas constant type —
Specific gas constant Rs (the default) or
Mean molar mass Mn (SI unit: J/(mol·K)). For
Mean molar mass the universal gas constant
R = 8.314 J/(mol·K) is used as the built-in physical constant. For both properties, the defaults use values
From material. For
User defined enter another value or expression.
If required by a Storage Model, the
Compressibility of the ideal gas is calculated as
χf = 1/pA with the absolute pressure
pA (Pa).