Flow Patterns in Rheologically Evolving Model Fluids Produced by Hybrid Dual Mixing Systems
作者： T. Espinosa-Solares , E. Brito-De la Fuente , A. Tecante , Ph. A. Tanguy
DOI: 10.1002/1521-4125(200109)24:9<913::AID-CEAT913>3.0.CO;2-H
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摘要: The flow patterns produced by two dual mixing systems composed of independently driven impellers were studied. included a turbine rotating at high speed (Rushton or Smith) and slowly helical ribbon agitator (HR). Visualizations power input used to evaluate performance. influence the rotational ratio on was evaluated. For shear-thinning fluids, N T /N HR modifies considerably. Three typical behaviors found with shear thinning fluids: segregation principal (N 10), well-distributed pattern throughout tank =10). low-viscosity motionless reduced vortex length T-HR eliminated when rotated in opposite directions =10. Finally, relationship between dimensionless Froude number is proposed for individual turbines as well turbine-motionless systems.
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