000014699 001__ 14699
000014699 005__ 20161115100159.0
000014699 04107 $$aeng
000014699 046__ $$k2016-08-21
000014699 100__ $$aHoriuti, Kiyosi
000014699 24500 $$aContravariant and Covariant Polymers in Elasto-inertial Viscoelastic Turbulence

000014699 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014699 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014699 506__ $$arestricted
000014699 520__ $$2eng$$aWe conduct multi-scale study on energy transfer due to polymers dispersed in homogeneous isotropic turbulence in elasto-inertial regime (EIT). Effect of introduction of non-affinity with macroscopically-imposed deformation in the motion of polymers is examined by connecting mesoscopic Brownian dynamics of elastic dumbbells to macroscopic DNS for solvent. The dumbbells are allowed to be advected either affinely (contravariant) or completely non-affinely (covariant). The relaxation time of polymer is in the order of eddy turnover time. Contravariant polymers drain more energy from the large scales than they can dissipate and transfer the excess energy back into the solvent when they are highly-stretched. It is shown that the skewness of strain-rate tensor in the production term for elastic energy and dissipation rate transfer elastic energy back into the smallest scale of the solvent and increase the dissipation. In the covariant polymers, this backward transfer is eliminated and elastic energy is retained when highly stretched.

000014699 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014699 653__ $$a

000014699 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014699 720__ $$aHoriuti, Kiyosi
000014699 8560_ $$ffischerc@itam.cas.cz
000014699 8564_ $$s151616$$uhttps://invenio.itam.cas.cz/record/14699/files/TS.FM12-5.04.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1306, code TS.FM12-5.04
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000014699 962__ $$r13812
000014699 980__ $$aPAPER