Prebfc is a program that can build a geometry and create a mesh. This software can be used in a simple or complexe, 2D or 3D geometry. Then the grid can be structured (cartesian, BFC) or unstructured. In the case of an unstructured grid, Prebfc is only able of meshing the surfaces, so you have to use Tgrid in the aim to mesh the interior.
TGrid is a highly efficient unstructured grid generation program that can handlegrids consisting of triangular, tertrahedral, hexahedral, prismatic, or pyramidal cells.Tgrid requires a dicretized boundary mesh consisting of either nodes and edges in 2D, or nodes and triangular faces in 3D. So TGrid is used with a grid which coming from Prebfc.
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