Modeling Rotating wheels inside a wheel fairing.
 

I have a car model, with open wheels away from the body, but 2/3rds or the top half of the wheel is covered by a fairing. This leaves only the bottom 1/3rd exposed to airflow.

I dont want to model the airflow inside the wheel arch as this would take too much time to develop properly. Is it possible to have only the exposed part modeled as rotating on its own, ignoring flow inside the wheel arch?