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

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28610%2F15%3A43872996" target="_blank" >RIV/70883521:28610/15:43872996 - isvavai.cz</a>
Result on the web
<a href="http://www.sciencedirect.com/science/article/pii/S0017931015002343" target="_blank" >http://www.sciencedirect.com/science/article/pii/S0017931015002343</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijheatmasstransfer.2015.02.071" target="_blank" >10.1016/j.ijheatmasstransfer.2015.02.071</a>

Result language
angličtina
Original language name
Investigation of convective heat transfer in 9-layer film blowing process by using variational principles
Original language description
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 byusing 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
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
JP - Industrial processes and processing
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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