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Investigation of convective heat transfer in 9-layer film blowing process by using variational principles

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dc.title Investigation of convective heat transfer in 9-layer film blowing process by using variational principles en
dc.contributor.author Zatloukal, Martin
dc.contributor.author Kolařík, Roman
dc.relation.ispartof International Journal of Heat and Mass Transfer
dc.identifier.issn 0017-9310 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2015
utb.relation.volume 86
dc.citation.spage 258
dc.citation.epage 267
dc.type article
dc.language.iso en
dc.publisher Pergamon Elsevier Science Ltd.
dc.identifier.doi 10.1016/j.ijheatmasstransfer.2015.02.071
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0017931015002343
dc.subject Convective heat transfer en
dc.subject Coextrusion en
dc.subject Multi-layer film blowing en
dc.subject Heat transfer coefficient en
dc.description.abstract In this work, coextrusion experiments utilizing an industrial 9-layer Brampton Engineering coextrusion film blowing line for LDPE/LDPE/tie/PA6/EVOH/PA6/tie/LDPE/LDPE film production has been performed in order to investigate the effect of cooling intensity on the bubble shape, temperature profile and final mechanical properties of the produced multilayer film. Obtained experimental, data followed by theoretical parametric analysis were used to evaluate three different convective heat transfer models by using simple variational principle based film blowing model. For the studied processing conditions and given multilayer structure of the coextruded film, it has been demonstrated experimentally that reduction in the heat transfer coefficient leads to increase in Young's modulus and yield strength. Secondly, it has been found that the variational principle based model can describe measured multilayer bubble shape reasonably well and finally, the Muslet & Kamal heat transfer model (Muslet and Kamal, 2004) provides more realistic behavior than Campbell heat transfer model (Campbell, 2014) or Constant heat transfer coefficient model, especially if the bubble has very high freezeline height. (C) 2015 Elsevier Ltd. All rights reserved. en
utb.faculty University Institute
utb.faculty Faculty of Technology
dc.identifier.uri http://hdl.handle.net/10563/1005111
utb.identifier.rivid RIV/70883521:28610/15:43872996!RIV16-MSM-28610___
utb.identifier.obdid 43873416
utb.identifier.scopus 2-s2.0-84959851999
utb.identifier.wok 000355029900027
utb.identifier.coden IJHMA
utb.source j-wok
dc.date.accessioned 2015-06-26T13:12:26Z
dc.date.available 2015-06-26T13:12:26Z
dc.description.sponsorship Grant Agency of the Czech Republic [P108/10/1325]; Operational Program Research and Development for Innovations - European Regional Development Fund (ERDF); national budget of Czech Republic [CZ.1.05/2.1.00/03.0111]
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Zatloukal, Martin
utb.contributor.internalauthor Kolařík, Roman
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