Hello Amine,

I used the cell registers and I managed to show all the cells with the positive volumes. I couldn't find a way to get negative volumes. Then, I found a post on CFD Online by our RD2016. All credit to RD2016; here is what I did:

- I created Iso-Surfaces under the Results.

- I selected the mesh as the surface constant and then I selected the Cell Volume

- After computing the volumes, I finalized the iso-surface.

- I added them to the display from the Setting Up Domain Ribbon.