Original title: Electrodiffusion Diagnostics of Apparent Wall Slip in Polymer Solutions
Authors: Wein, Ondřej ; Tovčigrečko, Valentin ; Večeř, M. ; Sobolík, Václav
Document type: Papers
Conference/Event: Konference chemického a procesního inženýrství CHISA 2009 /56./, Srní, Šumava (CZ), 2009-10-19 / 2009-10-22
Year: 2009
Language: eng
Abstract: Two substantially improved experimental methods, the apparent wall slip (AWS) rotational viscometry with a Morse-taper sensor and electrodiffusion (ED) flow diagnostics with autocalibrated friction probes, are used to study near-to-wall velocity profiles in aqueous solutions of high-molecular polysaccharides under viscometric flow conditions. By comparing the velocity data from the both methods, estimates of the depleted layer thickness in dependence on wall shear stress are obtained. The ED data support the two-layer model of AWS effect, with the constant enhanced fluidity across the depleted layer.
Keywords: apparent wall slip; depleted layer thickness; voltage-step transient
Project no.: CEZ:AV0Z40720504 (CEP), GA104/08/0428 (CEP), GA104/09/0972 (CEP)
Funding provider: GA ČR, GA ČR
Host item entry: Sborník, ISBN 978-80-86059-51-8
Note: Související webová stránka: www.chisa.cz/2009

Institution: Institute of Chemical Process Fundamentals AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0181352

Permalink: http://www.nusl.cz/ntk/nusl-41143


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