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Effect of flow path structure on solid/liquid separation under electric field

机译：电场下流路结构对固液分离的影响

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Electroosmosis is especially effective in removing liquid from a highly compressible difficult-to-filter solid/liquid mixture. The extent of solid/liquid separation depends on the electroosmotic pressure gradient (E-pg) which is a combination of applied electric field, the surface charge density of solid particles and the flow path structure in the mixture. The larger the E-pg value, the higher the solid content of the treated mixture. A theoretical equation of E-pg for a capillary flow is derived from the Navier-Stokes equation, and its extensions to a flow through porous materials are examined by using experimental E-pg values from constant-current electroosmotic dewatering (EOD), electroosmotic permeation (EOP) and electro-forced sedimentation (EFS) tests. It has been clarified that the specific hydrodynamic resistance alpha has the most effect on the E-pg value. The larger the alpha value of the material, the larger its E-pg value. Modifications to the existing theories were suggested to understand the effect of solid/liquid mixture concentration on the separation under electric field more precisely. (C) 2015 Elsevier B.V. All rights reserved.
机译：电渗透在从高度可压缩的难以过滤的固/液混合物中去除液体方面特别有效。固液分离的程度取决于电渗压力梯度（E-pg），该值是施加的电场，固体颗粒的表面电荷密度和混合物中流路结构的组合。 E-pg值越大，处理过的混合物的固体含量越高。从Navier-Stokes方程得出毛细管流的E-pg的理论方程，并通过使用恒流电渗脱水（EOD），​​电渗渗透的实验E-pg值来检查其对通过多孔材料的流动的扩展（EOP）和电沉积（EFS）测试。已经阐明，特定的流体动力阻力α对E-pg值具有最大的影响。材料的alpha值越大，其E-pg值越大。建议对现有理论进行修改，以更精确地了解电场下固/液混合物浓度对分离的影响。 （C）2015 Elsevier B.V.保留所有权利。

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