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- W76670851 abstract "ABSTRACT Flow visualisation and hot film anemometry were used to study the mixing and interpret power consumption data of disc turbines agitating unaerated and aerated highly viscous power law fluids which exhibited a yield stress and viscoelasticity. The presence of a yield stress affected fluid movement in both aerated and unaerated solutions and expression of viscoelastic behaviour was in the form of flow reversal and the Weissenberg effect. Viscoelasticity affected power consumption in the laminar, transition and turbulent regimes in unaerated solutions. The solution's rheology was found to affect the point of cavity formation, the type of cavity formed on aeration and thus the magnitude of the reduction in power consumption on aeration. The onset of small bubble formation, for all solutions and at a number of impeller diameters was found to occur at a constant Reynolds number calculated by assuming the maximum shear rate at the impeller tip is proportional to the tip speed and then calculating the apparent viscosity at that shear rate using the power law equation for the particular fluid. It was also found that the impeller flow necessary to fully mix the solutions increased as the impeller diameter increased and was dependent on fluid rheology." @default.
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- W76670851 date "1981-01-01" @default.
- W76670851 modified "2023-09-27" @default.
- W76670851 title "POWER AND HOLD-UP IN THE MIXING OF AERATED HIGHLY VISCOUS NON-NEWTONIAN FLUIDS" @default.
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- W76670851 doi "https://doi.org/10.1016/b978-0-08-025383-1.50087-4" @default.
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