I have a model constructed in autocad, and, while it does open in Simulation Mechanical, the model will not open in Simulation CFD. Additionally, Inventor Fusion does not give me the option to open my models in CFD, while it does give me the option to launch them in Mechanical. Any ideas why im having this issue? Any help is greatly appreciated!
Could it be that the geometry from AutoCAD is not suited for CFD. Sim CFD requires 3D CAD geometry which i believe is more than just 3D wireframe. Sim CFD does not solve for line elements. Sim Mech however, can make use of wireframe models as beam elements. As far as I know, Fusion should have the Sim CFD add-in, have you tried a reinstall?
With all our software closed, try running SimCFDConfig.exe from the CFD installation folder. Right click and run it as Admin.
This ought to add the CFD button into Fusion for you.
Your AutoCAD model is probably made up of Edges and not surfaces, the surfaces (at a minimum) is what you need to work inside of CFD. The AutoCAD workflow hasn't been developed yet so I would get the Fusion launcher working as noted by Jon and prep your model there and launch into CFD from Fusion.
When working with 2D models make sure your geometry is located on the XY plane.