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Dispersion in a Bingham plastic fluid: Effects of peripheral layer

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Abstract

The dispersion of a soluble matter in a plastic fluid flowing through a tube and a channel has been analysed by taking into account the variations of viscosity, diffusivity and yield stress. It has been shown that in the special case of a Bingham fluid, surrounded by a peripheral layer of a Newtonian fluid, the effective dispersion coefficient with which the solute disperses across a plane moving with the mean speed of the flow decreases with the viscosity of the peripheral layer fluid but increases as the molecular diffusion coefficient of this layer decreases. Further, the effective dispersion coefficient also decreases as the yield stress of the Bingham fluid increases.

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Authors and Affiliations

  1. Department of Mathematics, Indian Institute of Technology, IIT Post Office, 208016, Kanpur, U.P., India

    J. B. Shukla & S. P. Gupta

Authors
  1. J. B. Shukla
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  2. S. P. Gupta
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Shukla, J.B., Gupta, S.P. Dispersion in a Bingham plastic fluid: Effects of peripheral layer. Rheol Acta 21, 713–719 (1982). https://doi.org/10.1007/BF01524515

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  • DOI: https://doi.org/10.1007/BF01524515

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