I have a created a CAD model of my racecar based off a 3d scan that I wish to run a imcompressible fluid flow simulation on to determine the drag coefficient over time. However, when importing the model, I got a message that my geometry contained faults. I have used the information provided in the tutorial (Aerodynamics Simulation of Flow Around a Vehicle) in an attempt to stitch my model in autodesk inventor however I belive it only works for surface models whereas the model I am dealing with is not a surface model as per fusion 360 (My prefered cad program) attached below.
I am just wondering if anyone is able to point me in the right direction or perhaps have a quick look at my model. I have attach the URL below.
CAD faults are very common. The below article should help you locate all these faults in your model:
You can resolve some faults in our CAD Mode. But most often, these faults are easier and faster to resolve or fix in the CAD tool that you preferred to model the geometry in the first place.
Thank you for the reply, I have been able to improve the model however, there are a still a few faults that I am unable to solve. I’m just wondering if you offer a service to repair this model so it can be used for simulation. Thank you.
Unfortunately, we do not offer any service to repair a CAD model for you.
My recommendation would be to simplify the geometry as much as possible while keeping in mind the best practices for CAD creation and clean up!
Another recommendation would be to remodel the entire geometry manually in the first place without any gaps, interferences and other faults to avoid such an issue!
Another option is to create a new geometry from scratch. In my CFD experience, cleaning up a detailed CAD model is often more time-consuming than building a new one specifically for CFD. Keep in mind that CFD requires very clean geometries, free from intricate features that usually don’t contribute to the aerodynamic analysis but can be major sources of discretization errors and unnecessary computational resource usage.
