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Mechanisms of droplet impact on ultrasonically vibrating surfaces.

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Title: Mechanisms of droplet impact on ultrasonically vibrating surfaces.
Authors: Chen, Xiuhong1,2 (AUTHOR), Gu, Wenting1,2 (AUTHOR), Yan, Lutao1,2 (AUTHOR) YanltBupt@hotmail.com, Zhang, Qinjian3 (AUTHOR)
Source: Colloids & Surfaces A: Physicochemical & Engineering Aspects. Mar2026, Vol. 733, pN.PAG-N.PAG. 1p.
Subjects: Mass transfer, Wetting, Mechanism (Philosophy), Computer simulation, High-speed photography, Impact (Mechanics), Ultrasonic waves
Abstract: In precision coating, inkjet printing, and anti-/de-icing applications, droplet impact-spreading behavior plays a crucial role in mass transfer and wettability control. In this study, we systematically investigate the mechanism by which ultrasonic vibration regulates droplet impact-spreading behavior, based on coupled multiphysics numerical simulations and experimental observations. First, the conservation of momentum during droplet impact and spreading under ultrasonic vibration is derived. A two-dimensional axisymmetric multiphysics-coupled model is then established. Experimentally, high-speed imaging is employed to capture the droplet impact process, and the model's reliability is validated against the experimental results. Results show that, under applied ultrasonic vibration, the droplet's maximum spreading factor can increase by up to 36 %. When the Weber number increases to 43.72, the maximum spreading factor under ultrasonic vibration increases by 54 %, and the time to reach this peak shortens from 7.23 ms to 5.01 ms. Mechanistic analysis indicates that ultrasonic radiation pressure and acoustic streaming periodically alternate between lifting and suppressing, thereby modulating the droplet's internal pressure and contact-line velocity fields at the microscopic scale and accelerating spreading. This study provides a quantitative basis and mechanistic explanation for liquid transport and wettability control in ultrasonically-assisted precision coating, inkjet printing, and anti-/de-icing applications. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Colloids & Surfaces A: Physicochemical & Engineering Aspects is the property of Elsevier B.V. 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: 191265941
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
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  Group: Ti
  Data: Mechanisms of droplet impact on ultrasonically vibrating surfaces.
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  Data: <searchLink fieldCode="AR" term="%22Chen%2C+Xiuhong%22">Chen, Xiuhong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gu%2C+Wenting%22">Gu, Wenting</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yan%2C+Lutao%22">Yan, Lutao</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> YanltBupt@hotmail.com</i><br /><searchLink fieldCode="AR" term="%22Zhang%2C+Qinjian%22">Zhang, Qinjian</searchLink><relatesTo>3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="DE" term="%22Mass+transfer%22">Mass transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Wetting%22">Wetting</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanism+%28Philosophy%29%22">Mechanism (Philosophy)</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22High-speed+photography%22">High-speed photography</searchLink><br /><searchLink fieldCode="DE" term="%22Impact+%28Mechanics%29%22">Impact (Mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Ultrasonic+waves%22">Ultrasonic waves</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In precision coating, inkjet printing, and anti-/de-icing applications, droplet impact-spreading behavior plays a crucial role in mass transfer and wettability control. In this study, we systematically investigate the mechanism by which ultrasonic vibration regulates droplet impact-spreading behavior, based on coupled multiphysics numerical simulations and experimental observations. First, the conservation of momentum during droplet impact and spreading under ultrasonic vibration is derived. A two-dimensional axisymmetric multiphysics-coupled model is then established. Experimentally, high-speed imaging is employed to capture the droplet impact process, and the model's reliability is validated against the experimental results. Results show that, under applied ultrasonic vibration, the droplet's maximum spreading factor can increase by up to 36 %. When the Weber number increases to 43.72, the maximum spreading factor under ultrasonic vibration increases by 54 %, and the time to reach this peak shortens from 7.23 ms to 5.01 ms. Mechanistic analysis indicates that ultrasonic radiation pressure and acoustic streaming periodically alternate between lifting and suppressing, thereby modulating the droplet's internal pressure and contact-line velocity fields at the microscopic scale and accelerating spreading. This study provides a quantitative basis and mechanistic explanation for liquid transport and wettability control in ultrasonically-assisted precision coating, inkjet printing, and anti-/de-icing applications. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Colloids & Surfaces A: Physicochemical & Engineering Aspects is the property of Elsevier B.V. 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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      – Type: doi
        Value: 10.1016/j.colsurfa.2025.139262
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      – Code: eng
        Text: English
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        PageCount: 1
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      – SubjectFull: Mass transfer
        Type: general
      – SubjectFull: Wetting
        Type: general
      – SubjectFull: Mechanism (Philosophy)
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: High-speed photography
        Type: general
      – SubjectFull: Impact (Mechanics)
        Type: general
      – SubjectFull: Ultrasonic waves
        Type: general
    Titles:
      – TitleFull: Mechanisms of droplet impact on ultrasonically vibrating surfaces.
        Type: main
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      – PersonEntity:
          Name:
            NameFull: Chen, Xiuhong
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            NameFull: Gu, Wenting
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            NameFull: Yan, Lutao
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            NameFull: Zhang, Qinjian
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            – D: 20
              M: 03
              Text: Mar2026
              Type: published
              Y: 2026
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