Direct numerical simulation of hydrodynamic dispersion in open-cell solid foams

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Fully resolved simulations of flow and mass transfer in a unit cell of structured open-cell foam catalysts are presented. Numerical studies are conducted on a uniform three-dimensional Cartesian grid where the fluid-solid interface coupling is enforced via a sharp interface Immersed Boundary technique. Several validation cases for the numerical method are presented followed by extensive calculations to quantify hydrodynamic dispersion in open-cell foams. In our study five different porosities of the idealized foam structure, represented by the spatially periodic Kelvin's unit cell, were considered. Dimensionless dispersion coefficients were calculated for varying Péclet numbers and flow directions using volume-averaging theory. Our numerical studies indicate that Taylor dispersion is the dominant mechanism for structured porous media in the Darcy-Brinkman flow regime.

LanguageEnglish
Pages1305-1323
Number of pages19
JournalChemical Engineering Journal
Volume358
DOIs
StatePublished - 15 Feb 2019

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Direct numerical simulation
foam
Foams
Hydrodynamics
hydrodynamics
simulation
Peclet number
numerical method
Porous materials
porous medium
mass transfer
Numerical methods
Mass transfer
Porosity
catalyst
porosity
Catalysts
Fluids
fluid

Keywords

  • Dispersion
  • Immersed boundary method
  • Numerical study
  • Open cell foams
  • Porous media
  • Volume averaging theory

Cite this

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title = "Direct numerical simulation of hydrodynamic dispersion in open-cell solid foams",
abstract = "Fully resolved simulations of flow and mass transfer in a unit cell of structured open-cell foam catalysts are presented. Numerical studies are conducted on a uniform three-dimensional Cartesian grid where the fluid-solid interface coupling is enforced via a sharp interface Immersed Boundary technique. Several validation cases for the numerical method are presented followed by extensive calculations to quantify hydrodynamic dispersion in open-cell foams. In our study five different porosities of the idealized foam structure, represented by the spatially periodic Kelvin's unit cell, were considered. Dimensionless dispersion coefficients were calculated for varying P{\'e}clet numbers and flow directions using volume-averaging theory. Our numerical studies indicate that Taylor dispersion is the dominant mechanism for structured porous media in the Darcy-Brinkman flow regime.",
keywords = "Dispersion, Immersed boundary method, Numerical study, Open cell foams, Porous media, Volume averaging theory",
author = "V. Chandra and S. Das and Peters, {E. A.J.F.} and Kuipers, {J. A.M.}",
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Direct numerical simulation of hydrodynamic dispersion in open-cell solid foams. / Chandra, V.; Das, S.; Peters, E. A.J.F.; Kuipers, J. A.M.

In: Chemical Engineering Journal, Vol. 358, 15.02.2019, p. 1305-1323.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Direct numerical simulation of hydrodynamic dispersion in open-cell solid foams

AU - Chandra,V.

AU - Das,S.

AU - Peters,E. A.J.F.

AU - Kuipers,J. A.M.

PY - 2019/2/15

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N2 - Fully resolved simulations of flow and mass transfer in a unit cell of structured open-cell foam catalysts are presented. Numerical studies are conducted on a uniform three-dimensional Cartesian grid where the fluid-solid interface coupling is enforced via a sharp interface Immersed Boundary technique. Several validation cases for the numerical method are presented followed by extensive calculations to quantify hydrodynamic dispersion in open-cell foams. In our study five different porosities of the idealized foam structure, represented by the spatially periodic Kelvin's unit cell, were considered. Dimensionless dispersion coefficients were calculated for varying Péclet numbers and flow directions using volume-averaging theory. Our numerical studies indicate that Taylor dispersion is the dominant mechanism for structured porous media in the Darcy-Brinkman flow regime.

AB - Fully resolved simulations of flow and mass transfer in a unit cell of structured open-cell foam catalysts are presented. Numerical studies are conducted on a uniform three-dimensional Cartesian grid where the fluid-solid interface coupling is enforced via a sharp interface Immersed Boundary technique. Several validation cases for the numerical method are presented followed by extensive calculations to quantify hydrodynamic dispersion in open-cell foams. In our study five different porosities of the idealized foam structure, represented by the spatially periodic Kelvin's unit cell, were considered. Dimensionless dispersion coefficients were calculated for varying Péclet numbers and flow directions using volume-averaging theory. Our numerical studies indicate that Taylor dispersion is the dominant mechanism for structured porous media in the Darcy-Brinkman flow regime.

KW - Dispersion

KW - Immersed boundary method

KW - Numerical study

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KW - Porous media

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