Fluid and Fracture Properties

The node adds Equation 4-2 (excluding any mass sources) on the selected boundary for the pressure and provides an interface for defining the fluid material and its properties, including the effective porosity.


	All the nodes are the same as with the Darcy’s Law interface (see Fluid and Matrix Properties) except where indicated.

Fluid Properties

The default uses the (the material defined for the domain). Select another material as needed.

The default ρ (SI unit: kg/m3) uses values based on selected. For enter another value or expression. The default is 0 kg/m3.

The default μ (SI unit: Pa·s) uses values based on the selected. For enter another value or expression. The default is 0 Pa·s.


	If Hydraulic conductivity is selected as the Permeability model (see the Matrix Properties section), dynamic viscosity is not available. The hydraulic conductivity is defined using a combination of fluid and matrix properties and replaces the need of defining the dynamic viscosity.

Fracture Properties

The default uses the (the material defined for the fracture domain) for the fracture. Select another material as needed.

Porosity

The default in the fracture εf (a dimensionless number between 0 and 1) uses values based on the selected. For enter another value or expression. The default is 0.

Permeability Model

Select a to specify the capacity of the porous material to transmit flow: to define the permeability of the fracture, , which is a combination of permeability and the dynamic viscosity of water, or to define the permeability as a function of the fracture’s aperture.

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For κf (SI unit: m2) the default uses values as defined by the selected. For select to define a scalar value or , , or to enter a tensor value.

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For K (SI unit: m/s) enter a value or expression and select to define a scalar value or , , or to enter a tensor value.

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For enter a value or expression for the ff.