Automatically Prepare a Design for Simulation
COMSOL Multiphysics with LiveLink™ for AutoCAD® includes many features for geometry manipulation to prepare your designs for simulation. During geometry import from a CAD file, a design is automatically evaluated to ensure that any problems are detected and then repaired. The predefined tolerance based repair is automatic during import, and it can also heal gaps to create a solid object suitable for simulation.
CAD designs may contain small features that are either purposefully or unintentionally introduced during the design process. During simulation, small features such as fillets or small edges can increase computational demands by requiring meshes that are extremely dense. Using the tools provided with LiveLink™ for AutoCAD®, you can automatically detect small details or artifacts and then defeature the geometry in AutoCAD or in the COMSOL Multiphysics environment.
To complement the defeaturing tools, virtual geometry operations are available with COMSOL Multiphysics and enable you to suppress specific features in a COMSOL model geometry prior to simulation without having to physically remove them from a design. Meshes created from a virtual geometry are computationally less complex and are still based on the original surface curvature of a design, therefore improving the efficiency and accuracy of your simulations.
Options for File Import and Export
3D CAD designs can be imported from a file into COMSOL Multiphysics for simulation using the functionality provided with LiveLink™ for AutoCAD®. By default, an imported CAD design is converted to a Parasolid® geometry that supports Boolean geometry operations and additional conversions or modifications from within the COMSOL environment. As an example, you can close off, and create the geometry for, cavities in and around imported components to simulate fluid behavior in a design that initially contains only the hardware for manufacturing.
There are many CAD file formats that are supported by LiveLink™ for AutoCAD® for import into COMSOL Multiphysics. These include the widely supported CAD file formats ACIS®, IGES, Parasolid, STEP, as well as the native formats of other CAD systems such as Inventor®, PTC® Creo® Parametric™, PTC®Pro/ENGINEER®, and SOLIDWORKS®. Optional support for the CATIA® V5 file format is also available. File export from COMSOL Multiphysics in the Parasolid and ACIS formats ensures that any design changes made to a COMSOL model geometry can be readily shared with colleagues and imported into most CAD programs or viewers.
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