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Old 07-08-2008, 07:17 PM   #2 (permalink)
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active flow management

Ludwig Prandtl was experimenting with active fluid dynamics beginning in the 1920s.His work is shown in Hoerner's work.NASA plays with it,and I believe there was a very recent post about research at Georgia Tech University I think.So far,the energy input for the "pump" exceeds the energy saving due to pumping.Alex Tremulis believed such things would be common place by now,with average Cds of 0.12 for the typical passenger car.If you can crack this nut,your a trillionaire!
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