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Numerical Implementation of Detached-Eddy Simulation on a Passenger Vehicle and Some Experimental Correlation.

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Title: Numerical Implementation of Detached-Eddy Simulation on a Passenger Vehicle and Some Experimental Correlation.
Authors: Sterken, L.1,2 Lennert.sterken@volvocars.com, Sebben, S.1,2, Löfdahl, L.1
Source: Journal of Fluids Engineering. Sep2016, Vol. 138 Issue 9, p1-14. 14p.
Subjects: Numerical analysis, Eddy currents (Electric), Vehicle design & construction, ANSYS (Computer system), Computer software, Wind tunnels, Aerodynamics
Abstract: This study presents an implementation of delayed detached-eddy simulation (DDES) on a full-scale passenger vehicle for three configurations with the use of commercial software harpoon (mesher) and ANSYS FLUENT (solver). The methodology aims to simulate the flow accurately around complex geometries at relevantly high Re numbers for use in industrial applications, within an acceptable computational time. Geometric differences between the three configurations ensure significant drag changes that have a strong effect on the wake formation behind the vehicle. Therefore, this paper focuses on the analysis of the base wake region. At first, the paper evaluates the performance of the DDES, where it verifies the different operating conditions of the flow around the vehicle with respect to the DDES definition. In a second step, the numerical results are correlated with force measurements and time-averaged flow field investigations, conducted in the Volvo Cars aerodynamic wind tunnel (WT). The comparison confirms a good agreement between the experiments and the simulations. The resolved flow scales obtained by DDES give a further insight into differences in the wake flow characteristics between the configurations related to their contribution to drag. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Fluids Engineering is the property of American Society of Mechanical Engineers 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
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  Data: Numerical Implementation of Detached-Eddy Simulation on a Passenger Vehicle and Some Experimental Correlation.
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  Data: <searchLink fieldCode="AR" term="%22Sterken%2C+L%2E%22">Sterken, L.</searchLink><relatesTo>1,2</relatesTo><i> Lennert.sterken@volvocars.com</i><br /><searchLink fieldCode="AR" term="%22Sebben%2C+S%2E%22">Sebben, S.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Löfdahl%2C+L%2E%22">Löfdahl, L.</searchLink><relatesTo>1</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Fluids+Engineering%22">Journal of Fluids Engineering</searchLink>. Sep2016, Vol. 138 Issue 9, p1-14. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Numerical+analysis%22">Numerical analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Eddy+currents+%28Electric%29%22">Eddy currents (Electric)</searchLink><br /><searchLink fieldCode="DE" term="%22Vehicle+design+%26+construction%22">Vehicle design & construction</searchLink><br /><searchLink fieldCode="DE" term="%22ANSYS+%28Computer+system%29%22">ANSYS (Computer system)</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+software%22">Computer software</searchLink><br /><searchLink fieldCode="DE" term="%22Wind+tunnels%22">Wind tunnels</searchLink><br /><searchLink fieldCode="DE" term="%22Aerodynamics%22">Aerodynamics</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This study presents an implementation of delayed detached-eddy simulation (DDES) on a full-scale passenger vehicle for three configurations with the use of commercial software harpoon (mesher) and ANSYS FLUENT (solver). The methodology aims to simulate the flow accurately around complex geometries at relevantly high Re numbers for use in industrial applications, within an acceptable computational time. Geometric differences between the three configurations ensure significant drag changes that have a strong effect on the wake formation behind the vehicle. Therefore, this paper focuses on the analysis of the base wake region. At first, the paper evaluates the performance of the DDES, where it verifies the different operating conditions of the flow around the vehicle with respect to the DDES definition. In a second step, the numerical results are correlated with force measurements and time-averaged flow field investigations, conducted in the Volvo Cars aerodynamic wind tunnel (WT). The comparison confirms a good agreement between the experiments and the simulations. The resolved flow scales obtained by DDES give a further insight into differences in the wake flow characteristics between the configurations related to their contribution to drag. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Fluids Engineering is the property of American Society of Mechanical Engineers 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: 10.1115/1.4033296
    Languages:
      – Code: eng
        Text: English
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      Pagination:
        PageCount: 14
        StartPage: 1
    Subjects:
      – SubjectFull: Numerical analysis
        Type: general
      – SubjectFull: Eddy currents (Electric)
        Type: general
      – SubjectFull: Vehicle design & construction
        Type: general
      – SubjectFull: ANSYS (Computer system)
        Type: general
      – SubjectFull: Computer software
        Type: general
      – SubjectFull: Wind tunnels
        Type: general
      – SubjectFull: Aerodynamics
        Type: general
    Titles:
      – TitleFull: Numerical Implementation of Detached-Eddy Simulation on a Passenger Vehicle and Some Experimental Correlation.
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            NameFull: Sterken, L.
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            NameFull: Sebben, S.
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            NameFull: Löfdahl, L.
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            – D: 01
              M: 09
              Text: Sep2016
              Type: published
              Y: 2016
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