Foam

A multiphase system with many facets

Sascha Hilgenfeldt, Shehla Arif, Jih Chiang Tsai

Research output: Contribution to journalArticle

Abstract

Liquid foams are an extreme case of multiphase flow systems: capable of flow despite a very high dispersed phase volume fraction, yet exhibiting many characteristics of not only viscoelastic materials but also elastic solids. The non-trivial, well-defined geometry of foam bubbles is at the heart of a plethora of dynamical processes on widely varying length and time scales. We highlight recent developments in foam drainage (liquid dynamics) and foam rheology (flow of the entire gas-liquid system), emphasizing that many poorly understood features of other materials have precisely defined and quantifiable analogues in aqueous foams, where the only ingredients are well-known material parameters of Newtonian fluids and bubble geometry, together with subtle but important information on the surface mobility of the foam. Not only does this make foams an ideal model system for the theorist, but also an exciting object for experimental studies, in which dynamical processes span length scales from nanometres (thin films) to metres (foam continuum flows) and time scales from microseconds (film rupture) to minutes (foam rheology).

Original languageEnglish (US)
Pages (from-to)2145-2159
Number of pages15
JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
Volume366
Issue number1873
DOIs
StatePublished - Jun 28 2008

Fingerprint

Foam
Facet
foams
Foams
flat surfaces
Rheology
Liquid
rheology
Length Scale
Bubble
Liquids
Time Scales
bubbles
liquids
continuum flow
Viscoelastic Material
multiphase flow
Multiphase Flow
Geometry
Newtonian fluids

Keywords

  • Coarsening
  • Drainage
  • Foam rheology
  • Liquid foam

ASJC Scopus subject areas

  • Mathematics(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Foam : A multiphase system with many facets. / Hilgenfeldt, Sascha; Arif, Shehla; Tsai, Jih Chiang.

In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 366, No. 1873, 28.06.2008, p. 2145-2159.

Research output: Contribution to journalArticle

@article{0440539b35de40318af1009e638629c2,
title = "Foam: A multiphase system with many facets",
abstract = "Liquid foams are an extreme case of multiphase flow systems: capable of flow despite a very high dispersed phase volume fraction, yet exhibiting many characteristics of not only viscoelastic materials but also elastic solids. The non-trivial, well-defined geometry of foam bubbles is at the heart of a plethora of dynamical processes on widely varying length and time scales. We highlight recent developments in foam drainage (liquid dynamics) and foam rheology (flow of the entire gas-liquid system), emphasizing that many poorly understood features of other materials have precisely defined and quantifiable analogues in aqueous foams, where the only ingredients are well-known material parameters of Newtonian fluids and bubble geometry, together with subtle but important information on the surface mobility of the foam. Not only does this make foams an ideal model system for the theorist, but also an exciting object for experimental studies, in which dynamical processes span length scales from nanometres (thin films) to metres (foam continuum flows) and time scales from microseconds (film rupture) to minutes (foam rheology).",
keywords = "Coarsening, Drainage, Foam rheology, Liquid foam",
author = "Sascha Hilgenfeldt and Shehla Arif and Tsai, {Jih Chiang}",
year = "2008",
month = "6",
day = "28",
doi = "10.1098/rsta.2008.0004",
language = "English (US)",
volume = "366",
pages = "2145--2159",
journal = "Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences",
issn = "0962-8428",
publisher = "Royal Society of London",
number = "1873",

}

TY - JOUR

T1 - Foam

T2 - A multiphase system with many facets

AU - Hilgenfeldt, Sascha

AU - Arif, Shehla

AU - Tsai, Jih Chiang

PY - 2008/6/28

Y1 - 2008/6/28

N2 - Liquid foams are an extreme case of multiphase flow systems: capable of flow despite a very high dispersed phase volume fraction, yet exhibiting many characteristics of not only viscoelastic materials but also elastic solids. The non-trivial, well-defined geometry of foam bubbles is at the heart of a plethora of dynamical processes on widely varying length and time scales. We highlight recent developments in foam drainage (liquid dynamics) and foam rheology (flow of the entire gas-liquid system), emphasizing that many poorly understood features of other materials have precisely defined and quantifiable analogues in aqueous foams, where the only ingredients are well-known material parameters of Newtonian fluids and bubble geometry, together with subtle but important information on the surface mobility of the foam. Not only does this make foams an ideal model system for the theorist, but also an exciting object for experimental studies, in which dynamical processes span length scales from nanometres (thin films) to metres (foam continuum flows) and time scales from microseconds (film rupture) to minutes (foam rheology).

AB - Liquid foams are an extreme case of multiphase flow systems: capable of flow despite a very high dispersed phase volume fraction, yet exhibiting many characteristics of not only viscoelastic materials but also elastic solids. The non-trivial, well-defined geometry of foam bubbles is at the heart of a plethora of dynamical processes on widely varying length and time scales. We highlight recent developments in foam drainage (liquid dynamics) and foam rheology (flow of the entire gas-liquid system), emphasizing that many poorly understood features of other materials have precisely defined and quantifiable analogues in aqueous foams, where the only ingredients are well-known material parameters of Newtonian fluids and bubble geometry, together with subtle but important information on the surface mobility of the foam. Not only does this make foams an ideal model system for the theorist, but also an exciting object for experimental studies, in which dynamical processes span length scales from nanometres (thin films) to metres (foam continuum flows) and time scales from microseconds (film rupture) to minutes (foam rheology).

KW - Coarsening

KW - Drainage

KW - Foam rheology

KW - Liquid foam

UR - http://www.scopus.com/inward/record.url?scp=43749121048&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=43749121048&partnerID=8YFLogxK

U2 - 10.1098/rsta.2008.0004

DO - 10.1098/rsta.2008.0004

M3 - Article

VL - 366

SP - 2145

EP - 2159

JO - Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

JF - Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences

SN - 0962-8428

IS - 1873

ER -