Reply To: How to Draw an air domain in SpaceClaim?

[peteroznewman]

ANSYS staff do not open attachments, so please Insert the images from your pdf directly into your post (I am not ANSYS staff).

Here are the instructions.

• In SpaceClaim, put a plane at ground level.
• On the Prepare tab, click Enclosure and specify the distance from the sides and top of the house you want. Ignore the Enclosure going below ground.
• Click the Split By Plane tool, and click the plate and delete the body below ground.
• Pick the Solid body in the outline that is the house and right click to select Suppress for Physics. You only need the air, not the building.
• Click on the name at the top of the Structure outline on the left, and in the Properties window, change Share Topology to Share. This will allow solids and fluids to share nodes at the common interface.
• Close SpaceClaim and open Meshing.
• Pick a face and click N to create a Named Selection for inlet, repeat for outlet etc. Any face not named will automatically become a wall.
• Go to the Connections folder and delete any automatically created Contacts. You don't want them since you are using Shared Topology.

There is a method to have zero thickness walls, then each window only has one face.  See this post for an example. That will get you a model with fewer cells that solves a bit faster. If you do that, you must pick the face that is the open window and name it interior. That will allow air to flow through the window.