Drag Reduction by a Linear Viscosity Profile

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dc.creatorDe Angelis, Elisabetta
dc.creatorCasciola, Carlo
dc.creatorL'vov, Victor S.
dc.creatorPomyalov, Anna
dc.creatorProcaccia, Itamar
dc.creatorTiberkevich, Vasil
dc.date2004-01-07
dc.date.accessioned2026-07-07T07:47:14Z
dc.date.available2026-07-07T07:47:14Z
dc.descriptionDrag reduction by polymers in turbulent flows raises an apparent contradiction: the stretching of the polymers must increase the viscosity, so why is the drag reduced? A recent theory proposed that drag reduction in agreement with experiments is consistent with the effective viscosity growing linearly with the distance from the wall. With this self consistent solution the reduction in the Reynolds stress overwhelms the increase in viscous drag. In this Letter we show, using Direct Numerical Simulations, that a linear viscosity profile indeed reduces the drag in agreement with the theory and in close correspondence with direct simulations of the FENE-P model at the same flow conditions.
dc.description4 pages, 5 figures, JFM, submitted
dc.identifierhttps://arxiv.org/abs/nlin/0401005
dc.identifierhttp://arxiv.org/abs/nlin/0401005
dc.identifierPhys. Rev. E, 70, 055301(R), (2004)
dc.identifierdoi:10.1103/PhysRevE.70.055301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124098
dc.subjectChaotic Dynamics
dc.subjectFluid Dynamics
dc.titleDrag Reduction by a Linear Viscosity Profile
dc.typetext

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