Modification of capillary pressure by considering pore throat geometry with the effects of particle shape and packing features on water retention curves for uniformly graded sands

Hyoung Suk Suh, Tae Sup Yun

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Accurate estimation of capillary pressures at pore throats during pore network simulation is made by acquiring the effective distribution of non-wetting fluid and its effective shape factor. The suggested method is applied to authentic pore structures of synthetically assembled sphere packings and natural sands. Results highlight that the irregularity of pore throat tends to increase as particle shape becomes irregular while the effective shape factor of 0.8 can be consistently applicable regardless of particle shape. The modified water retention curve well captures experimental results. Packing density and gradation effects are less predominant compared with the effect of capillary pressure correction.

Original languageEnglish
Pages (from-to)129-136
Number of pages8
JournalComputers and Geotechnics
Volume95
DOIs
Publication statusPublished - 2018 Mar 1

Fingerprint

Capillarity
capillary pressure
water retention
Sand
geometry
sand
Geometry
Pore structure
Water
Fluids
fluid
effect
particle
simulation

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Computer Science Applications

Cite this

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N2 - Accurate estimation of capillary pressures at pore throats during pore network simulation is made by acquiring the effective distribution of non-wetting fluid and its effective shape factor. The suggested method is applied to authentic pore structures of synthetically assembled sphere packings and natural sands. Results highlight that the irregularity of pore throat tends to increase as particle shape becomes irregular while the effective shape factor of 0.8 can be consistently applicable regardless of particle shape. The modified water retention curve well captures experimental results. Packing density and gradation effects are less predominant compared with the effect of capillary pressure correction.

AB - Accurate estimation of capillary pressures at pore throats during pore network simulation is made by acquiring the effective distribution of non-wetting fluid and its effective shape factor. The suggested method is applied to authentic pore structures of synthetically assembled sphere packings and natural sands. Results highlight that the irregularity of pore throat tends to increase as particle shape becomes irregular while the effective shape factor of 0.8 can be consistently applicable regardless of particle shape. The modified water retention curve well captures experimental results. Packing density and gradation effects are less predominant compared with the effect of capillary pressure correction.

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