||January 11, 2010 10:25
struct/unstruct & grid vs solver
Originally Posted by peresah
Okay, although I have by now found papers stating that Star-CCM+ works on unstructured grids only and ICEM doesn't allow export of structured grids when Star-CCM+ is chosen as solver.
The key is to identify the difference between grid and solver. StarCCM+ is an unstructured solver. So when you have a structured grid and either read in directly into StarCCM+ (Plot3D for example) or ask ICEM (which creates structured grids) to create the StarCCM+ compatible grid they get converted to unstructured format.
BUT physically your grid used is still structured with respect to location of the grid points and the 3D volumes. You are still getting nice cubes of volume from your structured grid. If this was your original goal to have the structured grid for computational domain then stick with it. All that is happening is the format change in data storage. Your structured grid is not being converted to a different unstructured grid.
This is true for all unstructured solvers. Most commercial codes are unstructured solvers. Only in house research codes are structured solvers. There only way to read in is structured grids like Plot3D format.