Lee E.Lee Y.-S.Yen F.-Y.Hsu J.-P.2019-05-152019-05-15200000219797https://scholars.lib.ntu.edu.tw/handle/123456789/408503The electroosmotic flow of a general electrolyte solution through a fibrous medium is modeled theoretically taking the effect of double-layer polarization into account. The result obtained is applicable to an arbitrary level of electrical potential. We show that if the effect of double-layer polarization is neglected using the linearized Poisson-Boltzmann equation will underestimate electroosmotic velocity. The deviation becomes inappreciable, however, if £ea is either very large or very small, £e and a being, respectively, the reciprocal Debye length and the radius of a fiber. If the surface potential is high, the variation of electroosmotic velocity as a function of £ea may exhibit a local maximum and a local minimum, and the larger the porosity of the fibrous medium the lower the level of surface potential for the local extremals to occur. If £ea is small, the effect of surface potential on the electroosmotic velocity is more significant than that of double-layer polarization, and the reverse is true if £ea is large. ? 2000 Academic Press.Double-layer polarizationElectrokinetic equationsElectrolyte solutionElectroosmotic flowFibrous mediumjournal article10.1006/jcis.1999.66262-s2.0-0034653605https://www.scopus.com/inward/record.uri?eid=2-s2.0-0034653605&doi=10.1006%2fjcis.1999.6626&partnerID=40&md5=f9d85e4a803aa3aace0493bc53d1d5cb