Numerical simulation of the extrusion of strongly compressible Newtonian liquids

Taliadorou, E; Georgiou, GC; Mitsoulis, E

dc.contributor.author	Taliadorou, E	en
dc.contributor.author	Georgiou, GC	en
dc.contributor.author	Mitsoulis, E	en
dc.date.accessioned	2014-03-01T01:28:54Z
dc.date.available	2014-03-01T01:28:54Z
dc.date.issued	2008	en
dc.identifier.issn	0035-4511	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19020
dc.subject	Compressibility	en
dc.subject	Extrudates well flow	en
dc.subject	Liquid foams	en
dc.subject	Newtonian flow	en
dc.subject	Slip	en
dc.subject.classification	Mechanics	en
dc.subject.other	Compressibility	en
dc.subject.other	Equations of state	en
dc.subject.other	Extrusion	en
dc.subject.other	Foams	en
dc.subject.other	Newtonian liquids	en
dc.subject.other	Swelling	en
dc.subject.other	Wall flow	en
dc.title	Numerical simulation of the extrusion of strongly compressible Newtonian liquids	en
heal.type	journalArticle	en
heal.identifier.primary	10.1007/s00397-007-0207-6	en
heal.identifier.secondary	http://dx.doi.org/10.1007/s00397-007-0207-6	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	The axisymmetric and plane extrusion flows of a liquid foam are simulated assuming that the foam is a homogeneous compressible Newtonian fluid that slips along the walls. Compressibility effects are investigated using both a linear and an exponential equation of state. The numerical results confirm previous reports that the swelling of the extrudate decreases initially as the compressibility of the fluid is increased and then increases considerably. The latter increase is sharper in the case of the exponential equation of state. In the case of non-zero inertia, high compressibility was found to lead to a contraction of the extrudate after the initial expansion, similar to that observed experimentally with liquid foams and to decaying oscillations of the extrudate surface. The time-dependent calculations show that the oscillatory steady-state solutions are stable. These steady-state oscillatory solutions are not affected by the length of the extrudate region nor by the boundary condition along the wall. © Springer-Verlag 2007.	en
heal.publisher	SPRINGER	en
heal.journalName	Rheologica Acta	en
dc.identifier.doi	10.1007/s00397-007-0207-6	en
dc.identifier.isi	ISI:000252158900005	en
dc.identifier.volume	47	en
dc.identifier.issue	1	en
dc.identifier.spage	49	en
dc.identifier.epage	62	en