Isothermal Gas assisted displacement of a polystyrene melt

Torbjörn Gerhard Eriksson, Henrik K. Rasmussen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


    Isothermal gas displacements of a polystyrene melt (shaped as circular cylinder with a radius of 2.5mm) placed inside a circular steel annulus were performed. A flow valve ensures a constant flow rate and rotational symmetric flow during the displacement. The experiments show an increase in the steady fractional coverage above a Newtonian level at very low Deborah numbers. At higher Deborah numbers, where the melt behaves as an entangled melt system, the steady fractional coverage decreases. The fractional coverage is the fraction of melt left in the cylinder during steady displacement. Numerical finite element simulations show quantitative agreement within experimental error for Deborah numbers 0.3 <De <1, based on Doi and Edwards strain model.
    Original languageEnglish
    Title of host publicationPPS07 EA : PPS07 EA
    Number of pages7
    Place of PublicationCopenhagen, Denmark
    PublisherHexagon Holding ApS
    Publication date2007
    Publication statusPublished - 2007
    EventEurope/Africa Regional Meeting Polymer Processing Society - Gothenburg, Sweden
    Duration: 28 Aug 200730 Aug 2007


    ConferenceEurope/Africa Regional Meeting Polymer Processing Society


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