Estimation of the particle diffusivity in a liquid-solids fluidized bed based on a stochastic model |
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| Authors: | N. Yutani N. Ototake J.R. Too L.T. Fan |
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| Affiliation: | Department of Chemical Engineering, Tokyo University of Agriculture and Technology, Koganei City, Tokyo 184, Japan;Department of Chemical Engineering, Kansas State University, Manhattan, KS 66506, U.S.A. |
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| Abstract: | A simple method was developed for estimating the particle diffusivity or mixing coefficient in a liquid-solids fluidized bed from the variance (dispersion) of the number of particles in a given section of the bed during relaxation in the bed expansion. This variance was estimated from the pressure drop history above the location of the pressure sensor recorded continuously after the stepwise disturbance in the velocity of the fluidizing medium. The method has been verified by comparing the particle diffusivities obtained by the present method with the available data obtained by other methods. |
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| Keywords: | Author to whom correspondence should be addressed. |
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