Vizualizace a analýza meziplošných nestabilit při koextrudování LDPE

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F70883521%3A28110%2F04%3A63502619" target="_blank" >RIV/70883521:28110/04:63502619 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

"Visualisation and analysis of interfacial instability in the coextrusion of a LDPE melt.

Popis výsledku v původním jazyce

Details presented cover the study of interfacial instability of a low density polyethylene melt flow in a coextrusion flow visualisation cell. The cell design splits a single melt feed into two meltstreams using a flow divider. The meltstreams are made to converge at an angle of 30° and flow into a common die land of 1.0 mm height. The flows in the confluent region and die land to the die exit were observed through the side windows of the cell. The relative stream velocities, hence layer thickness ratio, of the two streams were varied using an adjustable restriction plate in the bottom channel. Stress and velocity fields were quantified using stress birefringence and particle image velocimetry techniques. Wave type interfacial instability was observedin the extrudate when the major/minor stream layer thickness ratio exceeded 2 : 1. Flow at immediate entry to the die land appeared stable when the extrudate exhibited instability. However, a disturbance was observed in the flow towards t

Název v anglickém jazyce

"Visualisation and analysis of interfacial instability in the coextrusion of a LDPE melt.

Popis výsledku anglicky

Details presented cover the study of interfacial instability of a low density polyethylene melt flow in a coextrusion flow visualisation cell. The cell design splits a single melt feed into two meltstreams using a flow divider. The meltstreams are made to converge at an angle of 30° and flow into a common die land of 1.0 mm height. The flows in the confluent region and die land to the die exit were observed through the side windows of the cell. The relative stream velocities, hence layer thickness ratio, of the two streams were varied using an adjustable restriction plate in the bottom channel. Stress and velocity fields were quantified using stress birefringence and particle image velocimetry techniques. Wave type interfacial instability was observedin the extrudate when the major/minor stream layer thickness ratio exceeded 2 : 1. Flow at immediate entry to the die land appeared stable when the extrudate exhibited instability. However, a disturbance was observed in the flow towards t

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CD - Makromolekulární chemie

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2004

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

PLASTICS RUBBER AND COMPOSITES

ISSN

1465-8011

e-ISSN

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Svazek periodika

33

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

27-35

Kód UT WoS článku

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EID výsledku v databázi Scopus

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