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- W337997239 abstract "In this project detailed one-dimensional Laser-Doppler measurements were carried out in two stirred vessels containing pseudoplastic, non-elastic non-Newtonian liquids. The two geometrically identical vessels were 0.441 m and 0.627 m in diameter. The flow induced by a Rushton turbine was studied in several liquids, with flow indices ranging from 0.85 to 0.57 . The effects of scale-up and pseudoplasticity on the turbulent flow were studied. Reynolds numbers of 6.0 10? up to 3.3 10?were reached. Measurements of the local instantaneous velocity components were conducted in a plane midway between two baffles, resulting in the calculation of non-dimensional mean and root mean square proflles of all three velocity components. The flow numbers and modifled flow numbers were determined at several radial positions in various liquids. It was decided not to correct the calculated flow parameters for the effect of velocity bias. A rehable, theoretically sohd correction method, applicable to all measurements conducted, was not found. All results presented are uncorrected values, allowing comparison of the measurements obtained in the two vessels, but making comparison with previously obtained results less straightforward. In addition the flow induced by an A315 axial impeller in non-Newtonian liquids, with flow indices of 0.85 and 0.72, was studied in the 0.441 m vessel, under turbulent conditions. The flow numbers and modified flow numbers at several axial positions in two different liquids were determined. The non-dimensional flow parameters in the non-Newtonian liquids were found to be independent of the impeller revolution frequency and the vessel diameter, for values of the Reynolds number of 1.0 10?or greater. The value of the flow index was found to have no significant effect on the turbulent flow parameters." @default.
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- W337997239 date "1996-10-01" @default.
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- W337997239 title "Scale up of turbulent agitated vessels containing non-Newtonian liquids" @default.
- W337997239 hasPublicationYear "1996" @default.
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