[aerohead]

Originally Posted by Tesla

One of the ideas I was considering is just opening a rear vent, as part of the internal venting, dual benefit, may help pull air through vehicle better for ventilation, hence minimise fan use and also put air into the rear vortex and reduce it's size & volatility.
Even though it is only a small amount of air, I imagine it's effect would also follow the cubed equations for velocity & force, hence a small amount of air may have a measurable effect.
Agreed, once you start using power to create the aero effects, benefits can be marginal or negative, so my thoughts are mainly to look at passive ways of moving air from high pressure zones to low pressure zones.
Will try and locate the article you mentioned.

At 60 miles per hour and around 35 square feet of frontal area you'd be displacing over 11-million cubic feet of air per hour/185,000 CFM.That's a lot of air to dilute.