Wall-bounded turbulence and drag reduction

Lawrence Sirovich, Mt. Sinai School of Medicine

A report on results of a series of wind-tunnel experiments that demonstrate a passive means of effectively controlling turbulence will be presented. The approach involves introduction of specified patterns of protrusions on the confining walls, which interact with the coherent, energy bearing eddy structures in the wall region. Relatively small changes in the arrangement of protrusions alter the response from drag decrease to drag increase. Some theoretical constructions to explain these behaviors will be presented.

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Last Modified: March 20, 1998