The paper presents the research developed for a more exact classification of the synthetic fluid based on polymer gels into a non-newtonian flow model, in the form: tau = tau0 + kSn, where tau is the shear stress, tau0 the yield stress, S the shear rate, k and n material coefficients. From the experimental results and dopted flow model were calculated the material coefficient values k and n, function to the yield stress and shear rate. A new friction coefficient was found: fa = f.psi, where f is the Darcy friction coefficient for newtonian fluids and psi a parameter function of n (power-law index).
Synthetic non-newtonian fluids based on polymer gels, II. Rheology of polymer gels for determining their flow in pipe-line
Synthetische Nicht-Newton-Flüssigkeiten auf Polymergel-Basis. II. Rheologie von Polymergels und Untersuchung ihres Fliessverhaltens in einer Pipeline
Industrial and Automotive Lubrication, International Colloquium, 11a ; 11,3 ; 2537-2542
1998
6 Seiten, 3 Bilder, 3 Tabellen, 3 Quellen
Aufsatz (Konferenz)
Englisch
Synthetic non-newtonian fluids based on polymer gels
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