• an lda study of rushton tangential velocity in mixing of polymeric liquids

    نویسندگان :
    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1392/07/24
    • تاریخ انتشار در تی پی بین: 1392/07/24
    • تعداد بازدید: 767
    • تعداد پرسش و پاسخ ها: 0
    • شماره تماس دبیرخانه رویداد: -
     polymer processing in stirred tank reactors has received significant interest in chemical industries. mean tangential and fluctuations velocities were measured using a two-component laser doppler anemometry system for a typical rushton turbine impeller. test fluids were different concentrations of polyacrylamide (paa) solutions with rheological properties typical of those found in polymer processes. it is shown that the correlations for mean tangential velocities in newtonian fluids do not apply to the case of polymeric liquids. new correlations are given in the lower part of the transition region, i. e. 30< re< 2000, for mean tangential values along the center line of the impeller tip. it is also shown that the dimensionless mean velocity distributions are not affected by impeller speed. furthermore, they decrease with increasing fluid concentration.

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