Control of Shear Dispersion by the Permeable Porous Wall of a Capillary Tube,Chemical Engineering & Technology

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Control of Shear Dispersion by the Permeable Porous Wall of a Capillary Tube
Chemical Engineering & Technology ( IF 1.8 ) Pub Date : 2020-08-19 , DOI: 10.1002/ceat.201900687
Zuhao Kou ₁ , Morteza Dejam ₁

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The transfer of a neutral nonreacting mass species was studied in a capillary tube with a permeable porous wall, under the effect of combined pressure‐driven and electro‐osmotic flows or simply combined flows (CF). An exact expression for the shear dispersion coefficient in a tube under the influence of CF is derived, which remains constant when λ_D, inversely propotional to the permeability of the porous medium, is smaller than 1 or larger than 100 for a constant Péclet number. In addition, the equivalent one‐dimensional governing equations for the concentrations of species in the tube and the permeable porous medium under the influence of CF are obtained. The proposed model is compared and verified with several existing models in the literature.

中文翻译：

毛细管渗透性多孔壁对剪切分散的控制

在压力驱动和电渗流或简单组合流（CF）共同作用下，在具有可渗透多孔壁的毛细管中研究了中性非反应性物质的转移。在CF的影响下一个管的剪切分散系数的精确表达式推导，其保持恒定时λ _d，逆propotional于多孔介质的渗透性，大于100对于恒定的Peclet数小于1或。此外，获得了CF影响下管和可渗透多孔介质中物质浓度的等效一维控制方程。所提出的模型与文献中已有的几种模型进行了比较和验证。

更新日期：2020-10-20

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