Brasil | Artículos de revistas
dc.creatorTOME, M. F.
dc.creatorPAULO, G. S.
dc.creatorPINHO, F. T.
dc.creatorALVES, M. A.
dc.date.accessioned2012-10-20T03:36:27Z
dc.date.accessioned2018-07-04T15:38:59Z
dc.date.available2012-10-20T03:36:27Z
dc.date.available2018-07-04T15:38:59Z
dc.date.created2012-10-20T03:36:27Z
dc.date.issued2010
dc.identifierJOURNAL OF NON-NEWTONIAN FLUID MECHANICS, v.165, n.5/Jun, p.247-262, 2010
dc.identifier0377-0257
dc.identifierhttp://producao.usp.br/handle/BDPI/29008
dc.identifier10.1016/j.jnnfm.2009.12.007
dc.identifierhttp://dx.doi.org/10.1016/j.jnnfm.2009.12.007
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1625650
dc.description.abstractThis work deals with the development of a numerical technique for simulating three-dimensional viscoelastic free surface flows using the PTT (Phan-Thien-Tanner) nonlinear constitutive equation. In particular, we are interested in flows possessing moving free surfaces. The equations describing the numerical technique are solved by the finite difference method on a staggered grid. The fluid is modelled by a Marker-and-Cell type method and an accurate representation of the fluid surface is employed. The full free surface stress conditions are considered. The PTT equation is solved by a high order method, which requires the calculation of the extra-stress tensor on the mesh contours. To validate the numerical technique developed in this work flow predictions for fully developed pipe flow are compared with an analytic solution from the literature. Then, results of complex free surface flows using the FIT equation such as the transient extrudate swell problem and a jet flowing onto a rigid plate are presented. An investigation of the effects of the parameters epsilon and xi on the extrudate swell and jet buckling problems is reported. (C) 2010 Elsevier B.V. All rights reserved.
dc.languageeng
dc.publisherELSEVIER SCIENCE BV
dc.relationJournal of Non-newtonian Fluid Mechanics
dc.rightsCopyright ELSEVIER SCIENCE BV
dc.rightsrestrictedAccess
dc.subjectThree-dimensional viscoelastic flow
dc.subjectFree surface
dc.subjectPTT model
dc.subjectFinite difference
dc.subjectMarker-and-cell
dc.subjectJet buckling
dc.subjectExtrudate swell
dc.titleNumerical solution of the PTT constitutive equation for unsteady three-dimensional free surface flows
dc.typeArtículos de revistas


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