Comparative study of correction methods of wall slip effects for CMC solutions - 23/05/15
, Mounir Mellal b, Ammar Bensakhria b, Mohamed Trari cBienvenue sur EM-consulte, la référence des professionnels de santé.
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Abstract |
In this paper, an experimental analysis has been carried out in order to characterize the rheological properties of non-Newtonian CMC fluids (carboxymethylcellulose CMC solutions). Two solutions at low and medium concentrations, respectively 0.5 and l.5%, have been tested. A comparative study of the three methods proposed by Mooney, Wiegreffe, and Geiger has been carried out. It was found that the two solutions follow the rheological power-law model of Ostwald/de Waele-type for the studied experimental range. The diameter of the flow channel influences the rheological behavior of the CMC solution and highlights the wall slip effects. For a 0.5% concentration, the methods of Mooney and Wiegreffe could not be used as they gave results that could not be explained physically. However, for a 1.5% concentration, the three of them gave satisfactory results.
Le texte complet de cet article est disponible en PDF.Keywords : Rheology, Experimental studies, Non-Newtonian fluids, Methods of quantification of wall slip, Carboxymethylcellulose (CMC)
Plan
Vol 343 - N° 5-6
P. 322-330 - mai 2015 Retour au numéro
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