Click on the command button ZONES
in the Operation toolpad. It opens the Zones subpad.
Click on the button SPECIFY BOUNDARY
TYPES in the subpad which opens the Specify Boundary Types form.
Pick the entity concerned in the table at the bottom of the
window. Gambit proposes automically the entities available for boundary
Give it a characteristical Name.
Choose the entity Type(Outflow,
by Gambit depends of the solver chosen (FLUENT)
You don't need to define walls and continuum fluid.
To visualise boundary conditions or not on the graphics :
When Gambit saves a mesh, any edges (in 2D) for which
you don't have specified a boundary type is written as a WALL by default.
Any faces (in 2D) will be written as FLUID by default so you don't have
to define the continuum type in the form.
In the Graphics/Windows
Control toolpad, click on the command button SPECIFY
Check B.Layers in
Check the option Visible
Boundary layers appears on the graphics with thw type
Check the option VisibleOff
to erase them.