Geometry

The geometry model in CUBIT serves as the basis for mesh generation. The geometric model is also used for the definition of boundary conditions. The ACIS solid modeling engine is used by CUBIT for solid geometry operations. CUBIT also builds a representation on top of the ACIS model, which it uses to define non-manifold topology. In addition to ACIS, CUBIT also provides the Mesh-Based Geometry kernel used when an ACIS representation is not available. The CUBIT representation is also used as a means for defining virtual geometry, which is used for feature removal and other useful meshing-related tasks. This chapter begins with definitions of geometric model used in CUBIT and the structure of the non-manifold geometry represented by CUBIT. This is followed by sections describing geometry import, creation, modification and export.