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Apparent Wall Slip (AWS) Viscometry - Influence of the Sensor's Surface.

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    SYSNO ASEP0380062
    Document TypeC - Proceedings Paper (int. conf.)
    R&D Document TypeThe record was not marked in the RIV
    TitleApparent Wall Slip (AWS) Viscometry - Influence of the Sensor's Surface.
    Author(s) Pěnkavová, Věra (UCHP-M) RID, ORCID, SAI
    Tihon, Jaroslav (UCHP-M) RID, ORCID, SAI
    Večeř, M. (CZ)
    Wein, Ondřej (UCHP-M) RID, SAI
    Source TitleBook of Abstracts, Volume 44. - - : -, 2012 - ISSN 1877-7058 - ISBN N
    Pagess. 36
    Number of pages1 s.
    Publication formflash disc - flash disc
    ActionInternational Congress on Rheology /16./
    Event date05.08.2012-10.08.2012
    VEvent locationLisbon
    CountryPT - Portugal
    Event typeWRD
    Languageeng - English
    CountryPT - Portugal
    KeywordsAWS viscometry ; microdisperse liquids ; influence of sensor's surface
    Subject RIVCI - Industrial Chemistry, Chemical Engineering
    R&D ProjectsGAP102/12/2043 GA ČR - Czech Science Foundation (CSF)
    Institutional supportUCHP-M - RVO:67985858
    AnnotationApparent wall slip (AWS) can affect the flow of microdisperse liquids in narrow channels. This phenomenon is characterized by the Navier slip coefficient in addition to the fluidity. A series of measurements at a given wall shear stress and varying gap thickness is necessary to separate the slip and fluidity effect. Organizing such a complex viscometric experiment over a span of shear stresses is the task for AWS viscometry. In this experimental study, the four KK viscometric sensors with different surface quality and the special statistical software AWSWork are used to determine the slip coefficients of aqueous kaolin dispersions. All the dispersions display some extent of the AWS effect, which is more pronounced at low shear stresses. The sensor’s surface does play important role. The artificial surface roughness suppresses the AWS effect which is, however, still discernible.
    WorkplaceInstitute of Chemical Process Fundamentals
    ContactEva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
    Year of Publishing2013
Number of the records: 1  

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