Drag Reduction and the Wavelength of Flow-oriented Wall Eddies
作者： LARRY D. ECKELMAN , GILEAD FORTUNA , T. J. HANRATTY
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摘要: THE decrease in turbulent friction1,2 caused by the addition of small amounts certain high molecular weight polymers to a fluid is still unexplained, although it seems be agreed that reduction felt chiefly region very close wall—the viscous sublayer. Recent investigations5 suggest large eddy structure sublayer characterized flow-oriented eddies6,7 with an average wavelength λ direction perpendicular mean flow and period τB defining interval between appearance bursts8,9.
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