Power-draw analysis of a coaxial mixer with Newtonian and non-Newtonian fluids in the laminar regime |
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Authors: | F ThibaultP.A Tanguy |
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Affiliation: | URPEI, Department of Chemical Engineering, École Polytechnique, P.O. Box 6079, Station Centre-Ville, Montreal, Que., Canada H3C 3A7 |
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Abstract: | The power consumption of a new coaxial mixer composed of a wall scraping arm and a series of rods and a pitched-blade turbine mounted on the same axis of revolution and operated in a contra-rotating mode has been characterized. The work is based on experimental measurements and 3D numerical simulations in the case of homogeneous Newtonian and non-Newtonian fluids in the laminar regime. Very good agreements between experimental and numerical results have been obtained. It has been shown that the Metzner-Otto concept can be extended to account for the speed ratio between the impellers, which allows to represent the power consumption results of the coaxial mixer on a single power master curve like with a single agitator mixer. |
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Keywords: | Multiple impellers Non-Newtonian Coaxial Metzner-Otto concept Numerical simulation Experiments |
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