Two-component LDV measurements in a stirred tank

Authors

  • M. Mahouast,

    Corresponding author
    1. Laboratoire d'Energétique et de Mécanique Théorique et Appliquée, CNRS-INPL, 2 rue de la Citadelle, F 54011 Nancy, France
    Current affiliation:
    1. Groupe de Recherche en Génie Thermique Université de Franche-Comté B.P. 527, F 90016 Belfort, France
    • Groupe de Recherche en Génie Thermique Université de Franche-Comté B.P. 527, F 90016 Belfort, France
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  • G. Cognet,

    1. Laboratoire d'Energétique et de Mécanique Théorique et Appliquée, CNRS-INPL, 2 rue de la Citadelle, F 54011 Nancy, France
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  • R. David

    1. Laboratoire d'Energétique et de Mécanique Théorique et Appliquée, CNRS-INPL, 2 rue de la Citadelle, F 54011 Nancy, France
    Current affiliation:
    1. Laboratoire des Sciences du Génie Chimique, CNRS-INPL, 1 rue Grandville. B.P. 451, 54001 Nancy Cédex
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Abstract

Previous work has shown that in a standard stirred tank, the three-dimensional velocity field in the discharge flow of the stirrer is characterized by a strong deviation from homogeneous isotropic turbulence. By means of a two-component laser Doppler velocimeter (2D-LDV), the equation image Reynolds stresses are measured in a 6.3-dm3 standard tank stirred by a six-flat-blade Rushton turbine. Obviously, these stresses must be known to better understand the turbulent mixing in such a configuration. Moreover, the 2D-LDV appears to be an efficient tool for characterizing, from an energy viewpoint, the type of agitator used and, in principle, is confirmed to be useful to accurately obtain the length scales of turbulence which are fundamental parameters for the study of the micromixing processes.

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