Question
How to check duplicates for Solids?
Answer
Generally when we are dealing with solids ,it happens that at the time of meshing you give different mesh size to different solids. Now to ensure proper nodal connectivity one need to check duplicates. Duplicate faces/Co-face represented by orange faces ensures proper connection between the solids.
To check duplicates , Go to Geometry> Tools > Check duplicates. In the window click on apply with all the solids activated in the work window.