Abstract
Creeping flow of a Newtonian fluid through a rigid permeable tube is considered and the transmural seepage is assumed to obey Darcy's law. Closed-form solutions for the pressure and velocity fields are presented and equations describing the axial variation of the mean cross-sectional pressure, the axial volumetric flow and the transmural fluid flux are derived. Approximate solutions for small seepage rates are given and are applied to the flow in the proximal renal tubule. Probable values for the epithelium permeability and the intraluminal hydrostatic pressure drop are obtained.
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Marshall, E.A., Trowbridge, E.A. Flow of a newtonian fluid through a permeable tube: The application to the proximal renal tubule. Bltn Mathcal Biology 36, 457–476 (1974). https://doi.org/10.1007/BF02463260
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DOI: https://doi.org/10.1007/BF02463260