000014686 001__ 14686
000014686 005__ 20161115100159.0
000014686 04107 $$aeng
000014686 046__ $$k2016-08-21
000014686 100__ $$aJeon, Jaewoo
000014686 24500 $$aDisplacing yield stress fluid by Newtonian fluid in a vertical circular channel

000014686 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014686 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014686 506__ $$arestricted
000014686 520__ $$2eng$$aWe investigate the characteristics of displacement flow of a yield stress fluid by a Newtonian fluid. A neutralized solution of Carbopol, is placed at the bottom of a vertical pipe, displaced by pumping Newtonian fluid downwards from the top. During the displacement, 3 flow regimes are identified: central-type, slump-type and turbulent. Central-type displacements left non-uniform residual layer at the wall. Slump-type displacement normally have two fronts moving at different speeds, sometimes with Carbopol moving backwards against the imposed flow (when the Atwood number (At) is positive and the imposed velocity low). Turbulent mixing results in no discernible boundary between the displacing and displaced fluids, typically for Re > 8000. In some experiments with low velocity and negative At, the initial developing phase forms at the beginning of the experiment and a portion of initial phase stays until the end of the experiment without being displaced.

000014686 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014686 653__ $$a

000014686 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014686 720__ $$aJeon, Jaewoo
000014686 8560_ $$ffischerc@itam.cas.cz
000014686 8564_ $$s226978$$uhttps://invenio.itam.cas.cz/record/14686/files/TS.FM12-3.03.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1280, code TS.FM12-3.03
.
000014686 962__ $$r13812
000014686 980__ $$aPAPER