Quote:
Originally Posted by skyking
flight does not equal or represent flow on a car on the ground.
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True, but that doesn't mean we must throw everything we see overboard.
This video shows the effect of VGs on airflow rather well - preventing reversal of the flow over the aft part of the wing.
These air speeds are comparable to car speeds.
These VGs do what we'd also want them to do : bend the airflow to make it conform to the surface we want it to flow over - wether it's a wing or a rear window.
Placement and size will be critical to determine wether they reduce overall drag, as they add drag by themselves and by the vortexes they produce.