By Hendrikus Egidius Antonia van den Akker; J J Derksen
Often, fluid blending and the comparable multiphase contacting procedures have regularly been considered as an empirical know-how. Many facets of combining, dispersing and contacting have been with regards to energy draw, yet knowing of the phenomena used to be constrained or qualitative on the so much. particularly over the past decade, although, plant operation goals have tightened and product standards became stricter. the general public expertise as to protection and environmental hygiene has elevated. The force in the direction of higher levels of sustainability within the approach industries has instructed for reduce quantities of solvents and for better yields and better selectivities in chemical reactors. All this has ended in a
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Extra resources for 10th European Conference on Mixing: proceedings of the 10th European conference, Delft, the Netherlands, July 2-5, 2000
The trailing vortex system contains the highest values of turbulence kinetic energy [6, 7] and it is interesting to compare the turbulence values generated by the different types of impellers. In Figures 5 and 6 the distribution of turbulence kinetic energy is shown for profiles which cut through the trailing vortices. The dimensionless variable x/T indicates the distance from the middle of the impeller blade. e. the impeller clearance h. Since PBT and the HI have an axial outflow a horizontal profile was chosen in this case and x/T describes the radial distance from the middle of the blade length at the lower tip.
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5 30 Figure 4 Variation of F1 with r / R in the i m p e l l e r s t r e a m of a Rushton turbine. Data from . A. ,]. Derksen (editors) 9 2000 Elsevier Science B. V. All rights reserved Turbulence generation by different types of impellers M. Sch~ifer, J. Yu, B. Genenger and F. de The turbulence generation by three different types of impellers, (1) a Rushton turbine, (2) a 4/45 ~ pitched blade impeller and (3) a hydrofoil impeller, was investigated by using a refractive index matched, automated LDA-technique.
10th European Conference on Mixing: proceedings of the 10th European conference, Delft, the Netherlands, July 2-5, 2000 by Hendrikus Egidius Antonia van den Akker; J J Derksen