Setting Boundary Conditions
Define the boundary types and specify the appropriate property values. The geometry that is used for this tutorial has six boundaries. Assign no-slip wall conditions to five of them, and assign the remaining boundary a pressure boundary condition.
To set the boundary conditions:
- Rename the Default_Fluid 2D node to Fluid.
-
Edit the
node and set the boundary types as follows:
Boundary
Type
Bottom
Wall
Left
Wall
Middle
Wall
Right
Wall
TopRight
Wall
TopLeft
Pressure Outlet
The default conditions are suitable for the wall boundaries, but the conditions for the pressure boundary must be reset.
-
Edit the
node and set the following properties:
Node Property Setting Turbulence Intensity Value 0.01 Turbulent Viscosity Ratio Value 100.0 Volume Fraction Value [1.0, 0.0] The Volume Fraction setting enforces the condition that only liquid water enters the solution domain through that boundary.
- Save the simulation.