Which tool you are using? Is it SpaceClaim or Fluent Meshing? Your problem looks like correct if I am wrong. Here two regions are fluid and one if for solid. Regards,KeyurHow to access Ansys Online Help DocumentHow to show full resolution imageGuidelines on the Student CommunityHow to use Google to search within Ansys Student Community

I am using design modeler for the geometry and fluent meshing.nSimilar but not exactly, I am lacking the walls (as you referred as 3).nI substracted 2 from 1, and this would create an additional volumetric region inside 2 which I do not know how to treat it.n