Using Ansys ICEM CFD's Direct CAD Interfaces, which maintain the parametric description of the geometry throughout the CAD model and the grid generation process, hexahedral grids can be easily remeshed on the modified geometry.

The geometry is selected in the CAD system and tagged with information ("made intelligent") for grid generation such as boundary conditions and grid sizes, and this intelligent geometry information is saved with the primary geometry.

In Hexa, by updating all entities with the update projection function, blocking vertices projected to prescribed points in the geometry are automatically adapted to the parametric change and one can recalculate the mesh immediately. Additionally, with the use of its Replay functionality, Hexa provides complete access to previous operations.