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Effects of Electroosmosis Flow of Bingham Plastic Fluid Induced by a Curved Microtube.

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Title: Effects of Electroosmosis Flow of Bingham Plastic Fluid Induced by a Curved Microtube.
Authors: Adurthy, Srivally1 (AUTHOR), Reza, Motahar1 (AUTHOR) motaharreza90@gmail.com, Chamkha, Ali J.2 (AUTHOR)
Source: Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ). Feb2025, Vol. 50 Issue 4, p2485-2507. 23p.
Subjects: Bingham flow, Debye length, Fluid dynamics, Energy conversion, Peclet number, Zeta potential
Abstract: This paper investigates the pressure-driven and electroosmotic flow of Bingham plastic fluid within a curved microtube in the presence of a streaming potential. Perturbation analysis is utilised to solve the governing equations and obtain approximate analytical solutions. Validation against existing literature confirms the accuracy of the approach, with highly favourable agreement observed. The electrical double-layer (EDL) distribution is analysed for various Debye lengths, perturbation parameters, curvature ratios, and zeta potentials. As curvature increases, the EDL decreases near the lower wall and increases near the upper wall. The impact of electroosmosis force, Debye lengths, perturbation parameters, curvature ratios, and ionic Peclet number on axial velocity profiles is investigated. Axial velocity increases with the electroosmotic parameter value due to a more significant axial electric force in the inner area. Additionally, velocity decreases with increasing Bingham parameter, particularly at the lower wall region, while it increases with curvature value in the upper half of the tube. Higher flow rates are observed within curved microtubes than linear ones under similar pressure gradients and cross-sectional shapes. Increasing Debye length reduces streaming potential magnitude, favouring pressure-driven flow over electroosmotic flow. Finally, the variation of electrokinetic energy conversion efficiency with curvature ratio for different Bingham parameters is analysed. Higher Bingham parameter values increase fluid viscosity, resulting in slower fluid movement, reduced streaming potential, and decreased efficiency of electrokinetic energy conversion. This study contributes to a deeper understanding of fluid dynamics within curved microtubes and offers insights into optimising energy conversion efficiency in Bingham plastic fluid systems. [ABSTRACT FROM AUTHOR]
Copyright of Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) is the property of Springer Nature 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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  Data: Effects of Electroosmosis Flow of Bingham Plastic Fluid Induced by a Curved Microtube.
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  Data: <searchLink fieldCode="DE" term="%22Bingham+flow%22">Bingham flow</searchLink><br /><searchLink fieldCode="DE" term="%22Debye+length%22">Debye length</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid+dynamics%22">Fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+conversion%22">Energy conversion</searchLink><br /><searchLink fieldCode="DE" term="%22Peclet+number%22">Peclet number</searchLink><br /><searchLink fieldCode="DE" term="%22Zeta+potential%22">Zeta potential</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This paper investigates the pressure-driven and electroosmotic flow of Bingham plastic fluid within a curved microtube in the presence of a streaming potential. Perturbation analysis is utilised to solve the governing equations and obtain approximate analytical solutions. Validation against existing literature confirms the accuracy of the approach, with highly favourable agreement observed. The electrical double-layer (EDL) distribution is analysed for various Debye lengths, perturbation parameters, curvature ratios, and zeta potentials. As curvature increases, the EDL decreases near the lower wall and increases near the upper wall. The impact of electroosmosis force, Debye lengths, perturbation parameters, curvature ratios, and ionic Peclet number on axial velocity profiles is investigated. Axial velocity increases with the electroosmotic parameter value due to a more significant axial electric force in the inner area. Additionally, velocity decreases with increasing Bingham parameter, particularly at the lower wall region, while it increases with curvature value in the upper half of the tube. Higher flow rates are observed within curved microtubes than linear ones under similar pressure gradients and cross-sectional shapes. Increasing Debye length reduces streaming potential magnitude, favouring pressure-driven flow over electroosmotic flow. Finally, the variation of electrokinetic energy conversion efficiency with curvature ratio for different Bingham parameters is analysed. Higher Bingham parameter values increase fluid viscosity, resulting in slower fluid movement, reduced streaming potential, and decreased efficiency of electrokinetic energy conversion. This study contributes to a deeper understanding of fluid dynamics within curved microtubes and offers insights into optimising energy conversion efficiency in Bingham plastic fluid systems. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) is the property of Springer Nature 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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        Value: 10.1007/s13369-024-09168-2
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        Text: English
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        StartPage: 2485
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        Type: general
      – SubjectFull: Debye length
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      – SubjectFull: Fluid dynamics
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      – SubjectFull: Energy conversion
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      – SubjectFull: Peclet number
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      – SubjectFull: Zeta potential
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      – TitleFull: Effects of Electroosmosis Flow of Bingham Plastic Fluid Induced by a Curved Microtube.
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              M: 02
              Text: Feb2025
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              Y: 2025
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