Here is a great tutorial from SimScale on performing CFD on a car. It’s essentially the exact same process as what we do, although for simplicity sake we do not apply moving walls on the wheels.
Aerodynamic Flow Behavior Around a Vehicle Tutorial | SimScale
CFD 101 F24:
**Note: Halve the frontal area if you are simulating half of an aerobody, otherwise if you use the whole frontal area value, your Cd will be 1/2 what it should be.
Previous CFD 101:
https://uwmidsun.atlassian.net/l/cp/E01RShXR