The Viscoelastic Flow (vef) interface (
) is used for simulating single-phase flows of viscoelastic fluids. The physics interface is only suitable for incompressible flows.
Then, from the Physics toolbar, add other nodes that implement, for example, boundary conditions and volume forces. You can also right-click
Viscoelastic Flow to select physics features from the context menu.
The Label is the default physics interface name.
The Name is used primarily as a scope prefix for variables defined by the physics interface. Refer to such physics interface variables in expressions using the pattern
<name>.<variable_name>. In order to distinguish between variables belonging to different physics interfaces, the
name string must be unique. Only letters, numbers, and underscores (_) are permitted in the
Name field. The first character must be a letter.
The default Name (for the first physics interface in the model) is vef.
When the Include gravity check box is selected, a global
Gravity feature is shown in the interface model tree.
Also, when the Include gravity check box is selected, the
Use reduced pressure option changes the pressure formulation from using the total pressure (default) to using the reduced pressure. For more information, see
Gravity
If the Viscoelastic constitutive relation is selected, the
Fluid Properties node also adds as variables the components of the elastic stress tensor.