The geometry for ANSYS ICEM CFD Cart3D software is provided as a collection of components. Each component is a closed triangulated surface (watertight with no internal geometry) with conformal facets. The geometry model can be loaded into ANSYS ICEM CFD in the standard way, as either CAD geometry or STL data. Using the existing CAD repair tools in ANSYS ICEM CFD, the model can then be used to create closed surface components for ANSYS ICEM CFD Cart3D. Using this component-based approach, a study can be performed in which components move or change without having to regenerate a completely new surface triangulation for the modified geometry.