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Numerical investigation of large-scale coherent structures in flow between two parallel fins.

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Title: Numerical investigation of large-scale coherent structures in flow between two parallel fins.
Authors: Bedoui, Maroua1 (AUTHOR), Guellouz, Mohamed Sadok1,2 (AUTHOR), Ben Chiekh, Maher1 (AUTHOR) maher.benchiekh@enim.rnu.tn
Source: Journal of Turbulence. Jun2026, Vol. 27 Issue 6, p170-186. 17p.
Subjects: Coherent structures, Fins (Engineering), Computer simulation, Axial flow, Reynolds stress, Computational fluid dynamics
Abstract: Numerical simulations of axial flow in a rectangular channel with two parallel fins were conducted using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations coupled with a Reynolds Stress Model (RSM). The primary objective of this study is to investigate the formation of quasi-periodic coherent structures and their significant role in fluid transport across the inter-fin region. Computational Fluid Dynamics (CFD) results were validated against experimental data available in the literature, specifically for Strouhal numbers and the spacings of coherent structures in the five studied test sections, with a ratio of fin height to inter-fin spacing ranging from 2.5 to 7.5. The Reynolds number, based on the hydraulic diameter of the channel and the bulk velocity, was held constant at 40 × 10⁴. Velocity profiles and contours were analysed to capture and describe the presence of coherent structures within this family of finned rectangular channels. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Turbulence 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: 194058683
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Numerical investigation of large-scale coherent structures in flow between two parallel fins.
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  Data: <searchLink fieldCode="AR" term="%22Bedoui%2C+Maroua%22">Bedoui, Maroua</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Guellouz%2C+Mohamed+Sadok%22">Guellouz, Mohamed Sadok</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ben+Chiekh%2C+Maher%22">Ben Chiekh, Maher</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> maher.benchiekh@enim.rnu.tn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Turbulence%22">Journal of Turbulence</searchLink>. Jun2026, Vol. 27 Issue 6, p170-186. 17p.
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  Data: <searchLink fieldCode="DE" term="%22Coherent+structures%22">Coherent structures</searchLink><br /><searchLink fieldCode="DE" term="%22Fins+%28Engineering%29%22">Fins (Engineering)</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Axial+flow%22">Axial flow</searchLink><br /><searchLink fieldCode="DE" term="%22Reynolds+stress%22">Reynolds stress</searchLink><br /><searchLink fieldCode="DE" term="%22Computational+fluid+dynamics%22">Computational fluid dynamics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Numerical simulations of axial flow in a rectangular channel with two parallel fins were conducted using the Unsteady Reynolds-Averaged Navier-Stokes (URANS) equations coupled with a Reynolds Stress Model (RSM). The primary objective of this study is to investigate the formation of quasi-periodic coherent structures and their significant role in fluid transport across the inter-fin region. Computational Fluid Dynamics (CFD) results were validated against experimental data available in the literature, specifically for Strouhal numbers and the spacings of coherent structures in the five studied test sections, with a ratio of fin height to inter-fin spacing ranging from 2.5 to 7.5. The Reynolds number, based on the hydraulic diameter of the channel and the bulk velocity, was held constant at 40 × 10⁴. Velocity profiles and contours were analysed to capture and describe the presence of coherent structures within this family of finned rectangular channels. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Turbulence 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: 10.1080/14685248.2026.2660656
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 17
        StartPage: 170
    Subjects:
      – SubjectFull: Coherent structures
        Type: general
      – SubjectFull: Fins (Engineering)
        Type: general
      – SubjectFull: Computer simulation
        Type: general
      – SubjectFull: Axial flow
        Type: general
      – SubjectFull: Reynolds stress
        Type: general
      – SubjectFull: Computational fluid dynamics
        Type: general
    Titles:
      – TitleFull: Numerical investigation of large-scale coherent structures in flow between two parallel fins.
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            NameFull: Bedoui, Maroua
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            NameFull: Guellouz, Mohamed Sadok
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          Name:
            NameFull: Ben Chiekh, Maher
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          Dates:
            – D: 01
              M: 06
              Text: Jun2026
              Type: published
              Y: 2026
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              Value: 27
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              Value: 6
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            – TitleFull: Journal of Turbulence
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