000016003 001__ 16003
000016003 005__ 20161115135335.0
000016003 04107 $$aeng
000016003 046__ $$k2013-06-12
000016003 100__ $$aDamianou, Y.
000016003 24500 $$aCessation Flows of Bingham Plastics With Slip At the Wall

000016003 24630 $$n34.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000016003 260__ $$bNational Technical University of Athens, 2013
000016003 506__ $$arestricted
000016003 520__ $$2eng$$aWe use finite elements in space and a fully implicit scheme in time in order to solve the cessation of axisymmetric Poiseuille flow of a Bingham plastic under the assumption that slip occurs along the wall. The Papanastasiou regularization of the constitutive equation is employed and a power-law expression is used to relate the wall shear stress to the slip velocity. The numerical results show that the velocity becomes and remains uniform before complete cessation and that the stopping time is finite only when the exponent s<1. In the case of Navier slip (s=1), the stopping time is infinite for any non-zero Bingham number and the volumetric flow rate decays exponentially. When s>1, the decay is much slower, i.e. polynomial. The asymptotic expressions for the volumetric flow rate in the case of full-slip are also derived.

000016003 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000016003 653__ $$aHerschel-Bulkley Fluid, Bingham Plastic, Slip Yield Stress, Poiseuille Flow, Cessation Flow, Stopping Time.

000016003 7112_ $$aCOMPDYN 2013 - 4th International Thematic Conference$$cIsland of Kos (GR)$$d2013-06-12 / 2013-06-14$$gCOMPDYN2013
000016003 720__ $$aDamianou, Y.$$iPhilippou, M.$$iKaoullas, G.$$iGeorgiou, G.
000016003 8560_ $$ffischerc@itam.cas.cz
000016003 8564_ $$s593345$$uhttps://invenio.itam.cas.cz/record/16003/files/2093.pdf$$yOriginal version of the author's contribution as presented on CD, section: SC-MS 08 COMPUTATIONAL NON-NEWTONIAN FLUID MECHANICS
.
000016003 962__ $$r15525
000016003 980__ $$aPAPER