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Rheological Study of Non-isothermal Viscoelastic Fluid in Reverse Roll Coating Phenomena.

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Title: Rheological Study of Non-isothermal Viscoelastic Fluid in Reverse Roll Coating Phenomena.
Authors: Hanif, A.1 (AUTHOR), Abbas, Z.1 (AUTHOR) zaheer.abbas@iub.edu.pk
Source: Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ). Feb2026, Vol. 51 Issue 3, p2529-2542. 14p.
Subject Terms: *Viscoelastic materials, *Coating processes, *Flow velocity, *Fluid flow, *Rheology, *Lubrication & lubricants, *Fluid dynamics
Abstract: The purpose of this article is to present a mathematical and theoretical model of reverse roll coating for a thin film using an incompressible, non-isothermal upper-convected Jeffery's Fluid. This model is used to represent viscoelastic fluids, which have viscous and elastic properties. The behavior of these complex fluids under shear and extensional flows can be predicted with the use of this model. The fluid moves between two rollers that are rotating counterclockwise in a narrow space. Using dimensionless parameters, dimensionless governing equations are produced. These dimensionless equations are reduced by the lubrication approximation theory (LAT). Analytical findings for velocity profile, pressure gradient, and temperature distribution are obtained by employing the perturbative technique. The pressure distribution, web-coated thickness, separation points, roll separating force, and power input were all numerically calculated from an engineering perspective. The separation point is shifted toward the nip zone, and the web coating thickness is decreased by increasing the velocity ratio k. The temperature profile is significantly influenced by the Brinkman number, which has increased as a result. The findings show that the viscoelastic parameter and velocity ratio have a significant impact on the velocity profile and pressure. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Header DbId: enr
DbLabel: Energy & Power Source
An: 192432402
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Label: Title
  Group: Ti
  Data: Rheological Study of Non-isothermal Viscoelastic Fluid in Reverse Roll Coating Phenomena.
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  Data: <searchLink fieldCode="AR" term="%22Hanif%2C+A%2E%22">Hanif, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abbas%2C+Z%2E%22">Abbas, Z.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> zaheer.abbas@iub.edu.pk</i>
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  Data: <searchLink fieldCode="JN" term="%22Arabian+Journal+for+Science+%26+Engineering+%28Springer+Science+%26+Business+Media+B%2EV%2E+%29%22">Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. )</searchLink>. Feb2026, Vol. 51 Issue 3, p2529-2542. 14p.
– Name: Subject
  Label: Subject Terms
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  Data: *<searchLink fieldCode="DE" term="%22Viscoelastic+materials%22">Viscoelastic materials</searchLink><br />*<searchLink fieldCode="DE" term="%22Coating+processes%22">Coating processes</searchLink><br />*<searchLink fieldCode="DE" term="%22Flow+velocity%22">Flow velocity</searchLink><br />*<searchLink fieldCode="DE" term="%22Fluid+flow%22">Fluid flow</searchLink><br />*<searchLink fieldCode="DE" term="%22Rheology%22">Rheology</searchLink><br />*<searchLink fieldCode="DE" term="%22Lubrication+%26+lubricants%22">Lubrication & lubricants</searchLink><br />*<searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The purpose of this article is to present a mathematical and theoretical model of reverse roll coating for a thin film using an incompressible, non-isothermal upper-convected Jeffery's Fluid. This model is used to represent viscoelastic fluids, which have viscous and elastic properties. The behavior of these complex fluids under shear and extensional flows can be predicted with the use of this model. The fluid moves between two rollers that are rotating counterclockwise in a narrow space. Using dimensionless parameters, dimensionless governing equations are produced. These dimensionless equations are reduced by the lubrication approximation theory (LAT). Analytical findings for velocity profile, pressure gradient, and temperature distribution are obtained by employing the perturbative technique. The pressure distribution, web-coated thickness, separation points, roll separating force, and power input were all numerically calculated from an engineering perspective. The separation point is shifted toward the nip zone, and the web coating thickness is decreased by increasing the velocity ratio k. The temperature profile is significantly influenced by the Brinkman number, which has increased as a result. The findings show that the viscoelastic parameter and velocity ratio have a significant impact on the velocity profile and pressure. [ABSTRACT FROM AUTHOR]
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RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1007/s13369-025-10008-0
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 14
        StartPage: 2529
    Subjects:
      – SubjectFull: Viscoelastic materials
        Type: general
      – SubjectFull: Coating processes
        Type: general
      – SubjectFull: Flow velocity
        Type: general
      – SubjectFull: Fluid flow
        Type: general
      – SubjectFull: Rheology
        Type: general
      – SubjectFull: Lubrication & lubricants
        Type: general
      – SubjectFull: Fluid dynamics
        Type: general
    Titles:
      – TitleFull: Rheological Study of Non-isothermal Viscoelastic Fluid in Reverse Roll Coating Phenomena.
        Type: main
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          Name:
            NameFull: Hanif, A.
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          Name:
            NameFull: Abbas, Z.
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          Dates:
            – D: 01
              M: 02
              Text: Feb2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 2193567X
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            – Type: volume
              Value: 51
            – Type: issue
              Value: 3
          Titles:
            – TitleFull: Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. )
              Type: main
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