This paper presents the results of a rheological study of the fiber-forming mixture viscose-hydroxyethylcellulose. For describing the behaviour over the large range of shear stresses a four-parameter Meter model was used. The dependence of the parameters of the model are described for technologically important ranges of temperature and concentration of the mixture. The correlation of the parameters is described in the form of the regression equations resulting from the statistical evaluation of planed experiments.
Results from a series of rheological and pipe flow experiments using watersoluble hydroxyethylcellulose and polyethyleneoxide are presented. Phenomena of drag reduction were investigated for values of concentration (in weight) of polymers in water ranging 2=10 4 to 2=5.10 -3. Velocity measurements by using a laserDoppler anemometer to type DISA-Mark II served for determining the variation in thickness of the elastic sublayer in the turbulent flow exhibiting drag reduction.
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