Pressure drop for low Reynolds number flows through regular and random screens

A. Valli, J. Hyväluoma (Corresponding Author), Ari Jäsberg, Antti Koponen, J. Timonen

Research output: Contribution to journalArticleScientificpeer-review

12 Citations (Scopus)

Abstract

Creeping flow through both regular and irregular screens was simulated by the lattice-Boltzmann method, and the dependence on screen porosity and Reynolds number of the pressure drop across the screen was analyzed. Regular structures were planar arrays of straight fibers or woven one-layer structures. The irregular planar structures were composed of randomly located and oriented fibers of finite length. A simple function of screen porosity based on partly numerical scaling arguments was found to describe accurately the simulated pressure drop across all regular screens. Due to their bigger surface area, the flow resistance of woven screens was found to be about 15% larger than that of regular planar screens with the same porosity. The pressure drop across irregular planar screens was found to be described by the same screen-porosity function with a slightly different ‘scaling’ exponent which thus appears to be dependent on the structure of the screen. The flow resistance of irregular structures was found to be clearly smaller than that of regular structures because of channelling of the flow through very few largest pores.
Original languageEnglish
Pages (from-to)193-208
Number of pages16
JournalTransport in Porous Media
Volume80
Issue number2
DOIs
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

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Pressure drop
Reynolds number
Porosity
Fibers

Cite this

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title = "Pressure drop for low Reynolds number flows through regular and random screens",
abstract = "Creeping flow through both regular and irregular screens was simulated by the lattice-Boltzmann method, and the dependence on screen porosity and Reynolds number of the pressure drop across the screen was analyzed. Regular structures were planar arrays of straight fibers or woven one-layer structures. The irregular planar structures were composed of randomly located and oriented fibers of finite length. A simple function of screen porosity based on partly numerical scaling arguments was found to describe accurately the simulated pressure drop across all regular screens. Due to their bigger surface area, the flow resistance of woven screens was found to be about 15{\%} larger than that of regular planar screens with the same porosity. The pressure drop across irregular planar screens was found to be described by the same screen-porosity function with a slightly different ‘scaling’ exponent which thus appears to be dependent on the structure of the screen. The flow resistance of irregular structures was found to be clearly smaller than that of regular structures because of channelling of the flow through very few largest pores.",
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Pressure drop for low Reynolds number flows through regular and random screens. / Valli, A.; Hyväluoma, J. (Corresponding Author); Jäsberg, Ari; Koponen, Antti; Timonen, J.

In: Transport in Porous Media, Vol. 80, No. 2, 2009, p. 193-208.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Pressure drop for low Reynolds number flows through regular and random screens

AU - Valli, A.

AU - Hyväluoma, J.

AU - Jäsberg, Ari

AU - Koponen, Antti

AU - Timonen, J.

PY - 2009

Y1 - 2009

N2 - Creeping flow through both regular and irregular screens was simulated by the lattice-Boltzmann method, and the dependence on screen porosity and Reynolds number of the pressure drop across the screen was analyzed. Regular structures were planar arrays of straight fibers or woven one-layer structures. The irregular planar structures were composed of randomly located and oriented fibers of finite length. A simple function of screen porosity based on partly numerical scaling arguments was found to describe accurately the simulated pressure drop across all regular screens. Due to their bigger surface area, the flow resistance of woven screens was found to be about 15% larger than that of regular planar screens with the same porosity. The pressure drop across irregular planar screens was found to be described by the same screen-porosity function with a slightly different ‘scaling’ exponent which thus appears to be dependent on the structure of the screen. The flow resistance of irregular structures was found to be clearly smaller than that of regular structures because of channelling of the flow through very few largest pores.

AB - Creeping flow through both regular and irregular screens was simulated by the lattice-Boltzmann method, and the dependence on screen porosity and Reynolds number of the pressure drop across the screen was analyzed. Regular structures were planar arrays of straight fibers or woven one-layer structures. The irregular planar structures were composed of randomly located and oriented fibers of finite length. A simple function of screen porosity based on partly numerical scaling arguments was found to describe accurately the simulated pressure drop across all regular screens. Due to their bigger surface area, the flow resistance of woven screens was found to be about 15% larger than that of regular planar screens with the same porosity. The pressure drop across irregular planar screens was found to be described by the same screen-porosity function with a slightly different ‘scaling’ exponent which thus appears to be dependent on the structure of the screen. The flow resistance of irregular structures was found to be clearly smaller than that of regular structures because of channelling of the flow through very few largest pores.

U2 - 10.1007/s11242-009-9350-0

DO - 10.1007/s11242-009-9350-0

M3 - Article

VL - 80

SP - 193

EP - 208

JO - Transport in Porous Media

JF - Transport in Porous Media

SN - 0169-3913

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ER -