Use a solid modeling platform, rather than a boundary representation platform, to generate CAD files, and ensure those are exported in a solid model format. While solid models give exact information about the volumes within a model, boundary models do not, and require volumes to be reconstructed from surfaces. When the intersection between surfaces is not exact, this can cause problems during import and meshing. In other words, it is not enough to simply have a model made of surfaces: volumes representing the computational domain are required.

When using other platforms, we recommend exporting the files in the native format for those platforms.

To leverage Luminary for meshing and CFD simulation, the CAD volumes of your model should represent the regions where the fluid flow will be simulated. If instead your CAD volumes represent the manufactured parts (i.e., your CAD is of the airplane, and not the simulation domain around the airplane), then you will need to use the available Geometry Modifications, such as adding a far field, to construct the fluid domain.

If there are parts of a model that you do not wish to simulate within Luminary Cloud, please delete them before exporting the CAD file.

If you are building a model out of multiple solids, you should ensure all of those solids have been joined together (uniting, subtracting, intersecting them, etc.) before exporting the CAD file.

if you are uploading an STL file, make sure it is watertight and manifold.