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On the Reynolds number sensitivity of smoothed particle hydrodynamics.

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Title: On the Reynolds number sensitivity of smoothed particle hydrodynamics.
Authors: Meister, Michael1, Burger, Gregor2, Rauch, Wolfgang3
Source: Journal of Hydraulic Research / Journal de Recherches Hydraulique. Dec2014, Vol. 52 Issue 6, p824-835. 12p.
Subjects: Hydrodynamics, Reynolds number, Poiseuille flow, Sensitivity analysis, Fluid-structure interaction
Abstract: This work investigates the Reynolds number sensitivity of the weakly compressible smoothed particle hydrodynamics method. A mode of instability previously reported for Poiseuille flow is systematically analysed for six relevant test cases. We discuss the influence of the presence of physical viscosity, investigate the origin of the instability for the Couette flow example and explore its implications on convergence properties. Moreover, a novel instability of slightly different nature, which arises in pipe flow with expanding diameter, is detected and a qualitative explanation is given. Since both types of instabilities also occur at Reynolds numbers well below the critical value, its origin is seen in high-frequency particle oscillations independent of any effects of turbulence. We further demonstrate for a flow over a sill and a weir that if there is no breakup of the fluid structure at low Reynolds numbers, then energy balance is accurately simulated even at high Reynolds numbers. Finally, the implications of the instability are addressed from a theoretical, computational and practical perspective. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Hydraulic Research / Journal de Recherches Hydraulique 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: 100014688
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: On the Reynolds number sensitivity of smoothed particle hydrodynamics.
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  Data: <searchLink fieldCode="DE" term="%22Hydrodynamics%22">Hydrodynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Reynolds+number%22">Reynolds number</searchLink><br /><searchLink fieldCode="DE" term="%22Poiseuille+flow%22">Poiseuille flow</searchLink><br /><searchLink fieldCode="DE" term="%22Sensitivity+analysis%22">Sensitivity analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Fluid-structure+interaction%22">Fluid-structure interaction</searchLink>
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  Data: This work investigates the Reynolds number sensitivity of the weakly compressible smoothed particle hydrodynamics method. A mode of instability previously reported for Poiseuille flow is systematically analysed for six relevant test cases. We discuss the influence of the presence of physical viscosity, investigate the origin of the instability for the Couette flow example and explore its implications on convergence properties. Moreover, a novel instability of slightly different nature, which arises in pipe flow with expanding diameter, is detected and a qualitative explanation is given. Since both types of instabilities also occur at Reynolds numbers well below the critical value, its origin is seen in high-frequency particle oscillations independent of any effects of turbulence. We further demonstrate for a flow over a sill and a weir that if there is no breakup of the fluid structure at low Reynolds numbers, then energy balance is accurately simulated even at high Reynolds numbers. Finally, the implications of the instability are addressed from a theoretical, computational and practical perspective. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Hydraulic Research / Journal de Recherches Hydraulique 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:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1080/00221686.2014.932855
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 12
        StartPage: 824
    Subjects:
      – SubjectFull: Hydrodynamics
        Type: general
      – SubjectFull: Reynolds number
        Type: general
      – SubjectFull: Poiseuille flow
        Type: general
      – SubjectFull: Sensitivity analysis
        Type: general
      – SubjectFull: Fluid-structure interaction
        Type: general
    Titles:
      – TitleFull: On the Reynolds number sensitivity of smoothed particle hydrodynamics.
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            NameFull: Meister, Michael
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            NameFull: Burger, Gregor
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            NameFull: Rauch, Wolfgang
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          Dates:
            – D: 01
              M: 12
              Text: Dec2014
              Type: published
              Y: 2014
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              Value: 52
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              Value: 6
          Titles:
            – TitleFull: Journal of Hydraulic Research / Journal de Recherches Hydraulique
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