Grid Merge

boris

I tried to generate grids using unstructured and structured meshes for different zones in seperate mesh files , and later to merge them together using Tgrid. In Fluent, I used interface definition to merge the non-conformal grids for the surfaces that are overlapped.

However, after pairing up the non-conformal surfaces using grid interface definition, the grid check failed. There were indications in the console window: negative volume appear, right and left handed surfaces. Fluent couldn't proceed after the warning.

By the way, the case was a VOF model with a quite big computational domain.

Please give your advices and comments on the possible reasons for the above problem.

Thank you very much in advance.