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Yves Dubief
Researcher at University of Vermont
Publications - 57
Citations - 2561
Yves Dubief is an academic researcher from University of Vermont. The author has contributed to research in topics: Turbulence & Drag. The author has an hindex of 21, co-authored 55 publications receiving 2213 citations. Previous affiliations of Yves Dubief include Center for Turbulence Research & University of Newcastle.
Papers
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Journal ArticleDOI
On coherent-vortex identification in turbulence
Yves Dubief,Franck Delcayre +1 more
TL;DR: In this paper, it was shown that the pressure Laplacian is positive within a low-pressure tube of small cross section enclosed by convex isobaric surfaces in a uniform density flow.
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On the coherent drag-reducing and turbulence-enhancing behaviour of polymers in wall flows
Yves Dubief,Christopher White,Vincent Terrapon,Eric S. G. Shaqfeh,Parviz Moin,Sanjiva K. Lele +5 more
TL;DR: In this paper, the authors used numerical simulations of turbulent polymer solutions using the FENE-P model to characterize the action of polymers on turbulence in drag-reduced flows and found that polymers are found to store and to release energy to the flow in a well-organized manner.
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Elasto-inertial turbulence.
Devranjan Samanta,Yves Dubief,Markus Holzner,Christof Schäfer,Alexander Morozov,Christian Wagner,Björn Hof,Björn Hof +7 more
TL;DR: It is demonstrated here for a model system of such complex fluids that at high shear rates, turbulence is not simply modified as previously believed but is suppressed and replaced by a different type of disordered motion, elasto-inertial turbulence.
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On the mechanism of elasto-inertial turbulence
TL;DR: Elasto-inertial turbulence provides new insights on the nature of the asymptotic state of polymer drag reduction (maximum drag reduction), and explains the phenomenon of early turbulence, or onset of turbulence at lower Reynolds numbers than for Newtonian flows observed in some polymeric flows.
Journal ArticleDOI
New Answers on the Interaction Between Polymers and Vortices in Turbulent Flows
Yves Dubief,Yves Dubief,Vincent Terrapon,Christopher White,Eric S. G. Shaqfeh,Parviz Moin,Sanjiva K. Lele +6 more
TL;DR: In this paper, the authors interpreted the data of polymer drag reduced flows in terms of modification of near-wall coherent structures, and showed that polymers are shown to reduce drag by damping nearwall vortices and sustain turbulence by injecting energy onto the streamwise velocity component in the very nearwall region.