### Abstract

In particulate materials, such as emulsions and granular media, a "jammed" system results if particles are packed together so that all particles are touching their neighbours, provided the density is sufficiently high. This paper studies through experiment, theory and simulation, the forces that particles exert upon one another in such a jammed state. Confocal microscopy of a compressed polydisperse emulsion provides a direct 3D measurement of the dispersed phase morphology within the bulk of the sample. This allows the determination of the probability distribution of interdroplet forces, P(f) where/is the magnitude of the force, from local droplet deformations. In parallel, the simplest form of the Boltzmann equation for the probability of force distributions predicts P(f) to be of the form e ^{-f/p}, where p is proportional to the mean force f̄ for large forces. This result is in good agreement with experimental and simulated data.

Original language | English (US) |
---|---|

Pages (from-to) | 207-220 |

Number of pages | 14 |

Journal | Faraday Discussions |

Volume | 123 |

State | Published - 2003 |

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### ASJC Scopus subject areas

- Physical and Theoretical Chemistry

### Cite this

*Faraday Discussions*,

*123*, 207-220.

**3D bulk measurements of the force distribution in a compressed emulsion system.** / Brujić, Jasna; Edwards, Sam F.; Grinev, Dmitri V.; Hopkinson, Ian; Brujić, Djordje; Makse, Hernán A.

Research output: Contribution to journal › Article

*Faraday Discussions*, vol. 123, pp. 207-220.

}

TY - JOUR

T1 - 3D bulk measurements of the force distribution in a compressed emulsion system

AU - Brujić, Jasna

AU - Edwards, Sam F.

AU - Grinev, Dmitri V.

AU - Hopkinson, Ian

AU - Brujić, Djordje

AU - Makse, Hernán A.

PY - 2003

Y1 - 2003

N2 - In particulate materials, such as emulsions and granular media, a "jammed" system results if particles are packed together so that all particles are touching their neighbours, provided the density is sufficiently high. This paper studies through experiment, theory and simulation, the forces that particles exert upon one another in such a jammed state. Confocal microscopy of a compressed polydisperse emulsion provides a direct 3D measurement of the dispersed phase morphology within the bulk of the sample. This allows the determination of the probability distribution of interdroplet forces, P(f) where/is the magnitude of the force, from local droplet deformations. In parallel, the simplest form of the Boltzmann equation for the probability of force distributions predicts P(f) to be of the form e -f/p, where p is proportional to the mean force f̄ for large forces. This result is in good agreement with experimental and simulated data.

AB - In particulate materials, such as emulsions and granular media, a "jammed" system results if particles are packed together so that all particles are touching their neighbours, provided the density is sufficiently high. This paper studies through experiment, theory and simulation, the forces that particles exert upon one another in such a jammed state. Confocal microscopy of a compressed polydisperse emulsion provides a direct 3D measurement of the dispersed phase morphology within the bulk of the sample. This allows the determination of the probability distribution of interdroplet forces, P(f) where/is the magnitude of the force, from local droplet deformations. In parallel, the simplest form of the Boltzmann equation for the probability of force distributions predicts P(f) to be of the form e -f/p, where p is proportional to the mean force f̄ for large forces. This result is in good agreement with experimental and simulated data.

UR - http://www.scopus.com/inward/record.url?scp=1542327529&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=1542327529&partnerID=8YFLogxK

M3 - Article

VL - 123

SP - 207

EP - 220

JO - Faraday Discussions

JF - Faraday Discussions

SN - 1359-6640

ER -