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Temporal instability of surfactant-laden compound jets with surface viscoelasticity.

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Title: Temporal instability of surfactant-laden compound jets with surface viscoelasticity.
Authors: Yao, Mu-wei1 (AUTHOR), Yang, Li-jun2,3 (AUTHOR), Fu, Qing-fei1,2,3 (AUTHOR) fuqingfei@buaa.edu.cn
Source: European Journal of Mechanics B: Fluids. Sep2021, Vol. 89, p191-202. 12p.
Subjects: Jets (Fluid dynamics), Newtonian fluids, Algebraic equations, Collocation methods, Viscoelasticity, Elasticity
Abstract: When compound jets are covered with surfactant on both interfaces, the property of those interfaces will be viscoelastic, unlike the Newtonian fluid interface. In this paper, the effects of surface viscoelasticity are principally studied through linear stability analysis and calculated using the Chebyshev spectral collocation method. Both surface elasticity and viscosity have properties to make the jet more stable, but the physical effects behind the two influencing mechanisms are different. When the inner and outer interfaces are separately covered with surfactant, the variations of surface viscoelastic parameters affect the growth rate and dominant wavenumber differently. In addition, the sensitivity of the maximum growth rate to the surface viscoelastic parameters depends on which interface the surfactant covers. A significant increase in the surface shear viscosity reduces the influence of surface elasticity on the maximum growth rate. The long-wave assumption was adopted to derive a one-dimensional dispersion equation in an algebraic form. The comparison between the simplified expression and the numerical results validated the applicability of the one-dimensional model in the vicinity of small wavenumber. • Surface viscoelastic effects are considered in a compound jet flow. • The increase of surface viscoelastic parameters will make the system more stable. • The increase of surface shear viscosity weakens the influence of surface elasticity. • Long-wave assumption is adopted to acquire simplified model. [ABSTRACT FROM AUTHOR]
Copyright of European Journal of Mechanics B: Fluids 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.)
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DbLabel: Engineering Source
An: 151662884
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PubTypeId: academicJournal
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  Data: Temporal instability of surfactant-laden compound jets with surface viscoelasticity.
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  Data: <searchLink fieldCode="AR" term="%22Yao%2C+Mu-wei%22">Yao, Mu-wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Li-jun%22">Yang, Li-jun</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Fu%2C+Qing-fei%22">Fu, Qing-fei</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> fuqingfei@buaa.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22European+Journal+of+Mechanics+B%3A+Fluids%22">European Journal of Mechanics B: Fluids</searchLink>. Sep2021, Vol. 89, p191-202. 12p.
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  Data: <searchLink fieldCode="DE" term="%22Jets+%28Fluid+dynamics%29%22">Jets (Fluid dynamics)</searchLink><br /><searchLink fieldCode="DE" term="%22Newtonian+fluids%22">Newtonian fluids</searchLink><br /><searchLink fieldCode="DE" term="%22Algebraic+equations%22">Algebraic equations</searchLink><br /><searchLink fieldCode="DE" term="%22Collocation+methods%22">Collocation methods</searchLink><br /><searchLink fieldCode="DE" term="%22Viscoelasticity%22">Viscoelasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Elasticity%22">Elasticity</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: When compound jets are covered with surfactant on both interfaces, the property of those interfaces will be viscoelastic, unlike the Newtonian fluid interface. In this paper, the effects of surface viscoelasticity are principally studied through linear stability analysis and calculated using the Chebyshev spectral collocation method. Both surface elasticity and viscosity have properties to make the jet more stable, but the physical effects behind the two influencing mechanisms are different. When the inner and outer interfaces are separately covered with surfactant, the variations of surface viscoelastic parameters affect the growth rate and dominant wavenumber differently. In addition, the sensitivity of the maximum growth rate to the surface viscoelastic parameters depends on which interface the surfactant covers. A significant increase in the surface shear viscosity reduces the influence of surface elasticity on the maximum growth rate. The long-wave assumption was adopted to derive a one-dimensional dispersion equation in an algebraic form. The comparison between the simplified expression and the numerical results validated the applicability of the one-dimensional model in the vicinity of small wavenumber. • Surface viscoelastic effects are considered in a compound jet flow. • The increase of surface viscoelastic parameters will make the system more stable. • The increase of surface shear viscosity weakens the influence of surface elasticity. • Long-wave assumption is adopted to acquire simplified model. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of European Journal of Mechanics B: Fluids 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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    Identifiers:
      – Type: doi
        Value: 10.1016/j.euromechflu.2021.05.009
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 12
        StartPage: 191
    Subjects:
      – SubjectFull: Jets (Fluid dynamics)
        Type: general
      – SubjectFull: Newtonian fluids
        Type: general
      – SubjectFull: Algebraic equations
        Type: general
      – SubjectFull: Collocation methods
        Type: general
      – SubjectFull: Viscoelasticity
        Type: general
      – SubjectFull: Elasticity
        Type: general
    Titles:
      – TitleFull: Temporal instability of surfactant-laden compound jets with surface viscoelasticity.
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            NameFull: Yao, Mu-wei
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            NameFull: Yang, Li-jun
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            NameFull: Fu, Qing-fei
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          Dates:
            – D: 01
              M: 09
              Text: Sep2021
              Type: published
              Y: 2021
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              Value: 89
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            – TitleFull: European Journal of Mechanics B: Fluids
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