I'm guessing you mean turbulent eddies (which form in a fluid) rather than eddy currents (which form inside metals subjected to changing magnetic fields). In a

I'm guessing you mean turbulent eddies (which form in a fluid) rather than eddy currents (which form inside metals subjected to changing magnetic fields). In any case, it's impossible to stop eddy currents from forming. Any car, even if it's as slippery as a LMP1 prototype, will generate lots of turbulent eddies. The question is, how bad will the drag coefficient be. And that's a question you won't be able to answer with simulations unless you have a few tens to hundreds of millions of CPU-hours lying around.