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The effect of turbulence on mass transfer rates between inertial polydisperse particles and fluid.

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Title: The effect of turbulence on mass transfer rates between inertial polydisperse particles and fluid.
Authors: Karchniwy, Ewa1,2 (AUTHOR) ewa.karchniwy@polsl.pl, Klimanek, Adam2 (AUTHOR), Haugen, Nils Erland L.1,3 (AUTHOR)
Source: Journal of Fluid Mechanics. 9/10/2019, Vol. 874, p1147-1168. 22p.
Subjects: Mass transfer, Turbulence, Drag (Aerodynamics), Clustering of particles, Particles, Drag force
Abstract: The current work investigates how turbulence affects the mass transfer rate between inertial particles and fluid in a dilute, polydisperse particle system. Direct numerical simulations are performed in which all scales of turbulence are fully resolved and particles are represented in a Lagrangian reference frame. The results show that, similarly to a monodisperse system, the mass transfer rate between particles and fluid decreases as a result of particle clustering. This occurs when the flow time scale (based on the turbulence integral scale) is long relative to the chemical time scale, and is strongest when the particle time scale is one order of magnitude smaller than the flow time scale (i.e. the Stokes number is around 0.1). It is also found that for larger solid mass fractions, the clustering of the heavier particles is enhanced by the effect of drag force from the particles on the fluid (momentum back-reactions or two-way coupling). In particular, when two-way coupling is accounted for, locations of particles of different sizes are much more correlated, which leads to a stronger effect of clustering, and thus a greater reduction of the particle–fluid mass transfer rate. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 144919676
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  Data: The effect of turbulence on mass transfer rates between inertial polydisperse particles and fluid.
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  Data: <searchLink fieldCode="AR" term="%22Karchniwy%2C+Ewa%22">Karchniwy, Ewa</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> ewa.karchniwy@polsl.pl</i><br /><searchLink fieldCode="AR" term="%22Klimanek%2C+Adam%22">Klimanek, Adam</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Haugen%2C+Nils+Erland+L%2E%22">Haugen, Nils Erland L.</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Fluid+Mechanics%22">Journal of Fluid Mechanics</searchLink>. 9/10/2019, Vol. 874, p1147-1168. 22p.
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  Data: <searchLink fieldCode="DE" term="%22Mass+transfer%22">Mass transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Turbulence%22">Turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Drag+%28Aerodynamics%29%22">Drag (Aerodynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22Clustering+of+particles%22">Clustering of particles</searchLink><br /><searchLink fieldCode="DE" term="%22Particles%22">Particles</searchLink><br /><searchLink fieldCode="DE" term="%22Drag+force%22">Drag force</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The current work investigates how turbulence affects the mass transfer rate between inertial particles and fluid in a dilute, polydisperse particle system. Direct numerical simulations are performed in which all scales of turbulence are fully resolved and particles are represented in a Lagrangian reference frame. The results show that, similarly to a monodisperse system, the mass transfer rate between particles and fluid decreases as a result of particle clustering. This occurs when the flow time scale (based on the turbulence integral scale) is long relative to the chemical time scale, and is strongest when the particle time scale is one order of magnitude smaller than the flow time scale (i.e. the Stokes number is around 0.1). It is also found that for larger solid mass fractions, the clustering of the heavier particles is enhanced by the effect of drag force from the particles on the fluid (momentum back-reactions or two-way coupling). In particular, when two-way coupling is accounted for, locations of particles of different sizes are much more correlated, which leads to a stronger effect of clustering, and thus a greater reduction of the particle–fluid mass transfer rate. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1017/jfm.2019.493
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 22
        StartPage: 1147
    Subjects:
      – SubjectFull: Mass transfer
        Type: general
      – SubjectFull: Turbulence
        Type: general
      – SubjectFull: Drag (Aerodynamics)
        Type: general
      – SubjectFull: Clustering of particles
        Type: general
      – SubjectFull: Particles
        Type: general
      – SubjectFull: Drag force
        Type: general
    Titles:
      – TitleFull: The effect of turbulence on mass transfer rates between inertial polydisperse particles and fluid.
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            NameFull: Karchniwy, Ewa
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            NameFull: Klimanek, Adam
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            NameFull: Haugen, Nils Erland L.
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            – D: 10
              M: 09
              Text: 9/10/2019
              Type: published
              Y: 2019
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              Value: 874
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            – TitleFull: Journal of Fluid Mechanics
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