Click Materials from the Setup tab:
Questions about applying settings?
Select the outer air part.
Hide the outer air part and the casing.
Select the internal air part.
Open the Materials quick edit dialog in ONE of the following ways:
- Click Edit from the toolbar:
- Click Edit from the Materials context panel:
On the Material quick edit dialog, Type = Fluid
Name = Air
To allow the properties to vary with temperature, click Set... on the Environment line. On the Material Environment dialog, select Variable, and click OK.
Click Apply.