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On the role of extensional rheology and Deborah number on the neck-in phenomenon during flat film casting

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dc.title On the role of extensional rheology and Deborah number on the neck-in phenomenon during flat film casting en
dc.contributor.author Barbořík, Tomáš
dc.contributor.author Zatloukal, Martin
dc.contributor.author Tzoganakis, Costas
dc.relation.ispartof International Journal of Heat and Mass Transfer
dc.identifier.issn 0017-9310 OCLC, Ulrich, Sherpa/RoMEO, JCR
dc.date.issued 2017
utb.relation.volume 111
dc.citation.spage 1296
dc.citation.epage 1313
dc.type article
dc.language.iso en
dc.publisher Elsevier Ltd.
dc.identifier.doi 10.1016/j.ijheatmasstransfer.2017.04.081
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0017931017309390
dc.subject Flat film production en
dc.subject Polymer melt en
dc.subject Rheology en
dc.subject Neck-in phenomenon en
dc.subject Uniaxial extensional viscosity en
dc.subject Planar extensional viscosity en
dc.description.abstract In this work, viscoelastic, isothermal extrusion film casting simulations have been performed utilizing a 1D membrane model and the viscoelastic modified Leonov model as the constitutive equation in order to elucidate the role of planar to uniaxial extensional viscosity ratio, extensional strain hardening and Deborah number on the neck-in phenomenon. Based on the performed theoretical parametric study, it has been found that neck-in can be correlated to all the above mentioned variables via a simple dimensionless analytical equation. This correlation can provide detailed view into the complicated relationship between polymer melt rheology, die design, process conditions and undesirable neck-in phenomenon. Obtained results have been validated against literature experimental data for different polyethylene melts and processing conditions. © 2017 Elsevier Ltd en
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1007347
utb.identifier.obdid 43876697
utb.identifier.scopus 2-s2.0-85018361861
utb.identifier.wok 000404092900119
utb.identifier.coden IJHMA
utb.source j-scopus
dc.date.accessioned 2017-09-08T12:14:43Z
dc.date.available 2017-09-08T12:14:43Z
dc.description.sponsorship 16-05886S, GACR, Grantová Agentura České Republiky
dc.description.sponsorship Grant Agency of the Czech Republic [16-05886S]
utb.contributor.internalauthor Barbořík, Tomáš
utb.contributor.internalauthor Zatloukal, Martin
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