[VaL06]

Hi everybody,

I try to compute the drag coefficient of a 3d model with ansys 18.1, i did the following steps:

• Load the 3D model in geometry
  Prepare->Enclosure to build the fluid domain
  mesh

Now when i go to add as value to compute the drag coefficient i can't select the surface of the body becouse it's define as interface and not wall..

I saw some youtube tutorials but they are with old version of ansys and i can't find the command boolean to remove the model's volume and the remove material buttom in facets is grey even if i select more than one solid.

I would be grateful if someone could give me a hand