Exporting mesh from Paraview and starting a new case with it.
 

Hello,

I have this mesh, and I would like to use it after adding some powder(randomly sized balls) on top of it. Unfortunately, the mesh is very messy, and is not closed. When I run the simulation, openfoam ignores the mesh. How would I properly incorporate this mesh?

I can't link the mesh, so here is an image of it
https://i.gyazo.com/d6bb34c52e07c7cc...9cb2154783.png
as you can see, it is not a closed mesh. Do you recommend simply closing the mesh by extruding the sides downward and then capping off the bottom? there seperated objects in it, and some of them have been sliced open at the borders as well. How would two walls on the same plane other affect the meshing process?

Thanks

Edit: I misunderstoof the question, ignore this.