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Macroscopic estimation method of the mixedness of Kenics type static mixer

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Abstract

We investigated the mixing process of the Kenics type static mixer, in which the mixing is enhanced by both advective mixing and mixing due to molecular diffusion in order to propose an estimation method of the mixedness. The results show that the element divides, folds and stretches the mixing fluids and forms a lamellar structure with striation width l a . The value of l a decreases with an increase in the number of elements by l a -(2n−1)−1, which represents the characteristics length of advective mixing. The characteristic length of mixing due to molecular diffusion l d can be estimated by solving the one-dimensional unsteady species conservation equation analytically. The macroscopic estimation and prediction method of mixedness is proposed as function of l a and l d . When l a >l d , the advective mixing is dominant, while, when l a <l d , the mixing due to molecular diffusion plays an important role.

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Authors and Affiliations

  1. School of Science for Open and Environmental Systems, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama, Kanagawa, 223-8522, Japan

    Sunho You, Naotaka Higuchi & Toshihisa Ueda

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  1. Sunho You
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  2. Naotaka Higuchi
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  3. Toshihisa Ueda
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Correspondence to Sunho You.

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You, S., Higuchi, N. & Ueda, T. Macroscopic estimation method of the mixedness of Kenics type static mixer. Korean J. Chem. Eng. 26, 1497–1503 (2009). https://doi.org/10.1007/s11814-009-0255-y

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  • DOI: https://doi.org/10.1007/s11814-009-0255-y

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