Here are some CFD images from a toy program apparently created with children in mind.
It was called Falcon, and gave interesting results on extremely low spec computers in mere minutes.
It isn't accurate, but I found it useful.
It was extremely easy to use ( load a model and get results in a few moments. )
I'm adding the images here to show what the program gave as pressures around the car.
I plan to add some fences like we have been discussing and see what changes appear.
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