Original title: On the characterisation of the Vočadlo fluids using a back extrusion technique
Translated title: K charakterizaci Vočadlova modelu pomocí postupu zpětného vytlačování
Authors: Filip, Petr ; David, Jiří ; Pivokonský, Radek
Document type: Papers
Conference/Event: Novel trends in rheology /2./, Zlín (CZ), 2007-08-14 / 2007-07-15
Year: 2007
Language: eng
Abstract: [eng] [cze]
Back extrusion represents one of the cheapest and time-saving experimental methods how to determine rheological characteristics of the fluids studied. This method is based on plunging of a circular rod into an axisymmetrically located circular cup containing the experimental sample. Formerly this method was successfully applied to power-law, Bingham and Herschel-Bulkley fluids. The aim of this contribution is to present a sufficiently simple user-friendly procedure how to determine the individual rheological parameters appearing in the Vočadlo model (sometimes called Robertson-Stiff one) - yield stress, consistency parameter and flow behaviour index. Metoda zpětné extruse se řadí k levnějším a časově úspornějším metodám, pomocí kterých lze vyhodnotit parametry vybraných reologických modelů jako např. mocninného či Herschelova-Bulkleyho. Tento příspěvek se zabývá určením hodnot parametrů pro Vočadlův model.
Keywords: Back extrusion; Robertson-Stiff model; Viscosity; Vocadlo model
Project no.: CEZ:AV0Z20600510 (CEP), GA103/06/1033 (CEP)
Funding provider: GA ČR
Host item entry: Novel trends in rheology, ISBN 978-80-7318-591-6

Institution: Institute of Hydrodynamics AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0156081

Permalink: http://www.nusl.cz/ntk/nusl-38281


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Research > Institutes ASCR > Institute of Hydrodynamics
Conference materials > Papers