I am relatively new to CFD-Simulation and I ran into a problem while working on a project. I am trying to model a centrifugal pump with a pipe attached.
I am using OnShape to create the pump with the pipe for analysis and when I import the CAD objects, the geometry is reported as water tight. However, after meshing, there is a warning (in yellow/orange), that the “tessellated surface is not closed”. So I am wondering why that would happen if the drawing is water tight. Also, even though the material point is inside the object, the outside was meshed so I am assume there is a hole somewhere.
Does the mesh just need to be refined more?
Is it possible for the meshing process to leave behind holes even though the CAD is water tight?