Quote:
Originally Posted by winkosmosis
There's a weird tendency on this forum to think attached flow is all that matters for drag... I think it's just a bandwagon mentality--- a few members who consider themselves experts constantly talk about attached flow, and that becomes the common wisdom. But what also matters is the energy it takes to move air aside. Just because you have a bubble making airflow look nice in a wind tunnel doesn't mean it's not taking more energy than if the "bubble" was made of metal.
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"Fluid seeks to avoid very large velocities while negotiating sharp edges,and forms surfaces of discontinuity instead." Ludwig Prandtl,phD.,Gottingen Wind Tunnel,Germany.