dc.contributor.author | Fyrillas, Marios M. | en |
dc.contributor.author | Georgiou, Georgios C. | en |
dc.contributor.author | Vlassopoulos, Dimitris | en |
dc.contributor.author | Hatzikiriakos, Savvas George | en |
dc.creator | Fyrillas, Marios M. | en |
dc.creator | Georgiou, Georgios C. | en |
dc.creator | Vlassopoulos, Dimitris | en |
dc.creator | Hatzikiriakos, Savvas George | en |
dc.date.accessioned | 2019-12-02T10:35:13Z | |
dc.date.available | 2019-12-02T10:35:13Z | |
dc.date.issued | 1999 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/56842 | |
dc.description.abstract | A mechanism for explaining some of the instabilities observed during the extrusion of polymer melts is further explored. This is based on the combination of non-monotonic slip and elasticity, which permits the existence of periodic solutions in viscometric flows. The time-dependent, incompressible, one-dimensional plane Poiseuine flow of an Oldroyd-B fluid with slip along the wall is studied using a nonmonotonic slip equation relating the shear stress to the velocity at the wall. The stability of the steady-state solutions to one-dimensional perturbations at fixed volumetric flow rate is analyzed by means of a linear stability analysis and finite element calculations. Self-sustained periodic oscillations of the pressure gradient are obtained when an unstable steady-state is perturbed, in direct analogy with experimental observations. | en |
dc.source | Polymer Engineering and Science | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033280681&doi=10.1002%2fpen.11637&partnerID=40&md5=ce316604c4e2c4518082b9db3db70a2e | |
dc.subject | Perturbation techniques | en |
dc.subject | Finite element method | en |
dc.subject | Viscous flow | en |
dc.subject | Shear stress | en |
dc.subject | Extrusion | en |
dc.subject | Elasticity | en |
dc.subject | Incompressible flow | en |
dc.subject | Oscillations | en |
dc.subject | Poiseuille flow | en |
dc.subject | Polymer melts | en |
dc.title | Mechanism for extrusion instabilities in polymer melts | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1002/pen.11637 | |
dc.description.volume | 39 | |
dc.description.issue | 12 | |
dc.description.startingpage | 2498 | |
dc.description.endingpage | 2504 | |
dc.author.faculty | Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Μαθηματικών και Στατιστικής / Department of Mathematics and Statistics | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :10</p> | en |
dc.source.abbreviation | Polym.Eng.Sci. | en |
dc.contributor.orcid | Vlassopoulos, Dimitris [0000-0003-0866-1930] | |
dc.contributor.orcid | Fyrillas, Marios M. [0000-0003-3668-1648] | |
dc.contributor.orcid | Georgiou, Georgios C. [0000-0002-7451-224X] | |
dc.gnosis.orcid | 0000-0003-0866-1930 | |
dc.gnosis.orcid | 0000-0003-3668-1648 | |
dc.gnosis.orcid | 0000-0002-7451-224X | |