Quote:
Originally Posted by Asanelli
so the area in red on rear window is an area of non laminar flow thus causing turbulance and excess fuel usage, is that how i am lead to believe what is going on there.
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The pocket behind the tail lights is like a small,sideways notchback car section.The air separates at the edge of the 'cliff',then reattaches as it would on an extended boot/trunklid.
There is a local recirculation bubble and the tufts are dancing within this turbulence.
You do pay a minor penalty for the turbulence,but with reattachment,the outer flow skips over the localized disturbance and goes on as if it didn't exist.