Flow rate through microfilters: Influence of the pore size distribution, hydrodynamic interactions, wall slip, and inertia

We examine the fluid mechanics of viscous flow through filters consisting of perforated thin plates. We classify the effects that contribute to the hydraulic resistance of the filter. Classical analyses assume a single pore size and account only for filter thickness. We extend these results to obtai...

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Bibliographic Details
Published in:Physics of fluids (1994) 2014-05, Vol.26 (5)
Main Authors: Jensen, Kaare H., Valente, André X. C. N., Stone, Howard A.
Format: Article
Language:English
Subjects:
Computational fluid dynamics
Flow velocity
Fluid dynamics
Fluid filters
Fluid flow
Fluid mechanics
Physics
Pore size
Pore size distribution
Porosity
Pressure drop
Thin plates
Viscous flow
Wall slip
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Summary:We examine the fluid mechanics of viscous flow through filters consisting of perforated thin plates. We classify the effects that contribute to the hydraulic resistance of the filter. Classical analyses assume a single pore size and account only for filter thickness. We extend these results to obtain an analytical formula for the pressure drop across the microfilter versus the flow rate that accounts for the non-uniform distribution of pore sizes, the hydrodynamic interactions between the pores given their layout pattern, and wall slip. Further, we discuss inertial effects and their order of scaling.
ISSN:1070-6631
1089-7666
DOI:10.1063/1.4876937