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Modeling porous shell formation in bidisperse suspension droplet drying.

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Title: Modeling porous shell formation in bidisperse suspension droplet drying.
Authors: Krasovitov, Boris1 (AUTHOR), Fominykh, Andrew1 (AUTHOR), Wolf, Silas2 (AUTHOR), Schilde, Carsten2 (AUTHOR), Levy, Avi1 (AUTHOR) avi@bgu.ac.il
Source: Drying Technology. 2026, Vol. 44 Issue 9, p1303-1315. 13p.
Subjects: Colloidal suspensions, Mass transfer, Colloids, Brownian motion, Capillarity
Abstract: In this study, the self-organization of colloidal particles during drying of a bimodal suspension droplet over a constant evaporation rate was investigated using the continuous species transport model. The model considers the transport of particles of two sizes due to capillary-driven liquid flow through the porous medium, Brownian diffusion, and diffusiophoresis induced by the osmotic pressure gradient of small particles. It is shown that diffusiophoresis of large particles is an interconnected transport mechanism thermodynamically coupled to the flows of small particles and liquid. Comparison with the available experimental data showed good agreement: the model adequately reproduces the formation of a porous aggregate. At high evaporation rates ( ψ = 6.0 µm2/ms, d L / d s = 3 : 1), Brownian diffusion and capillary-driven hydrodynamic flow dominate, which leads to the accumulation of particles at the surface without pronounced radial stratification. At a lower speed ( ψ = 0.237 µm2/ms, d L / d s = 10 : 1) diffusiophoresis occurs, and clear stratification is observed: small particles at the surface, large ones in the center. [ABSTRACT FROM AUTHOR]
Copyright of Drying Technology is the property of Taylor & Francis Ltd 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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Header DbId: egs
DbLabel: Engineering Source
An: 195034843
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Modeling porous shell formation in bidisperse suspension droplet drying.
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  Data: <searchLink fieldCode="JN" term="%22Drying+Technology%22">Drying Technology</searchLink>. 2026, Vol. 44 Issue 9, p1303-1315. 13p.
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  Data: <searchLink fieldCode="DE" term="%22Colloidal+suspensions%22">Colloidal suspensions</searchLink><br /><searchLink fieldCode="DE" term="%22Mass+transfer%22">Mass transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Colloids%22">Colloids</searchLink><br /><searchLink fieldCode="DE" term="%22Brownian+motion%22">Brownian motion</searchLink><br /><searchLink fieldCode="DE" term="%22Capillarity%22">Capillarity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this study, the self-organization of colloidal particles during drying of a bimodal suspension droplet over a constant evaporation rate was investigated using the continuous species transport model. The model considers the transport of particles of two sizes due to capillary-driven liquid flow through the porous medium, Brownian diffusion, and diffusiophoresis induced by the osmotic pressure gradient of small particles. It is shown that diffusiophoresis of large particles is an interconnected transport mechanism thermodynamically coupled to the flows of small particles and liquid. Comparison with the available experimental data showed good agreement: the model adequately reproduces the formation of a porous aggregate. At high evaporation rates ( ψ = 6.0 µm2/ms, d L / d s = 3 : 1), Brownian diffusion and capillary-driven hydrodynamic flow dominate, which leads to the accumulation of particles at the surface without pronounced radial stratification. At a lower speed ( ψ = 0.237 µm2/ms, d L / d s = 10 : 1) diffusiophoresis occurs, and clear stratification is observed: small particles at the surface, large ones in the center. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Drying Technology is the property of Taylor & Francis Ltd 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:
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    Identifiers:
      – Type: doi
        Value: 10.1080/07373937.2025.2608928
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 13
        StartPage: 1303
    Subjects:
      – SubjectFull: Colloidal suspensions
        Type: general
      – SubjectFull: Mass transfer
        Type: general
      – SubjectFull: Colloids
        Type: general
      – SubjectFull: Brownian motion
        Type: general
      – SubjectFull: Capillarity
        Type: general
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      – TitleFull: Modeling porous shell formation in bidisperse suspension droplet drying.
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            NameFull: Krasovitov, Boris
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            NameFull: Fominykh, Andrew
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            NameFull: Wolf, Silas
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            NameFull: Schilde, Carsten
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            NameFull: Levy, Avi
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          Dates:
            – D: 01
              M: 07
              Text: 2026
              Type: published
              Y: 2026
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              Value: 07373937
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              Value: 44
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              Value: 9
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            – TitleFull: Drying Technology
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