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Empirical Modelling of Nonmonotonous Behaviour of Shear Viscosity
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SYSNO ASEP 0395466 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Empirical Modelling of Nonmonotonous Behaviour of Shear Viscosity Author(s) David, Jiří (UH-J)
Filip, Petr (UH-J) ORCID, RID, SAI
Kharlamov, Alexander (UH-J)Article number 658187 Source Title Advances in Materials Science and Engineering. - : Hindawi - ISSN 1687-8434
Roč. 2013, August (2013)Number of pages 4 s. Publication form Online - E Language eng - English Country US - United States Keywords shear viscosity ; Galindo-rosales ; Carreau-yasuda Subject RIV BK - Fluid Dynamics R&D Projects GA103/09/2066 GA ČR - Czech Science Foundation (CSF) Institutional support UH-J - RVO:67985874 UT WOS 000324421300001 DOI 10.1155/2013/658187 Annotation Almost all hitherto proposed empirical models used for characterization of shear viscosity of non-Newtonian liquids describe only its monotonous course. However, the onset of new materials is accompanied by more complicated characteristics of their behaviour including nonmonotonous course of shear viscosity. This feature is reflected not only in an existence of one extreme point (maximum or minimum), but also it can appear in both extreme points; that is, this shear viscosity initially exhibits shear thinning; after attaining a local minimum, it converts to shear thickening, and again after reaching a local maximum, it has a shear-thinning character. It is clear that, for an empirical description of this complex behaviour, a hitherto, used number of parameters (four, five) in classical monotonous models (such as Cross or Carreau-Yasuda) are no longer tenable. If more parameters are applied, there should be given an emphasis on a relatively simple algebraic form of the proposed models, unambiguity of the involved parameters, and their sound interpretation in the whole modelling. This contribution provides an overview of the existing empirical nonmonotonous models and proposes a new 10-parameter model including a demonstration of its flexibility using various experimental data. Workplace Institute of Hydrodynamics Contact Soňa Hnilicová, hnilicova@ih.cas.cz, Tel.: 233 109 003 Year of Publishing 2014 Electronic address http://www.hindawi.com/journals/amse/2013/658187/
Number of the records: 1