Fluid
This node defines the material properties of the fluid of the
Porous Medium
parent node.
Model Input
This section contains fields and values that are inputs for expressions defining material properties. If such user-defined property groups are added, the model inputs appear here.
Fluid Properties
Specify the
Density
ρ
and the
Dynamic viscosity
μ
(SI unit: Pa·s) of the fluid. The defaults use values
From material
, for
User defined
enter a value or expression.
The dynamic viscosity describes the relationship between the shear stresses and the shear rate in a fluid. Intuitively, water and air have a low viscosity, and substances often described as thick, such as oil, have a higher viscosity.