View in EDS

Experimental study of the flows in a non-axisymmetric ellipsoid under precession.

Saved in:
Bibliographic Details
Title: Experimental study of the flows in a non-axisymmetric ellipsoid under precession.
Authors: Burmann, Fabian1 (AUTHOR) fabian.burmann@erdw.ethz.ch, Noir, Jérõme1 (AUTHOR)
Source: Journal of Fluid Mechanics. Feb2022, Vol. 932, p1-21. 21p.
Subjects: Ellipsoids, Astrophysical fluid dynamics, Cartesian coordinates, Laminar boundary layer, Rotational motion, Rossby number, Rotating fluid, Stellar rotation
Abstract: The angle between Graph $\boldsymbol {\varOmega } {\boldsymbol {p}}$ and Graph $\boldsymbol {\varOmega } {\boldsymbol {s}}$, i.e. the precession angle, is fixed to Graph $90^\circ$. Alternatively, since the fluid rotation is no longer close to the container axis, it may be argued that the asymptotic values of the damping coefficients Graph $\lambda r,\lambda i$ and Graph $\lambda {sup}$ are not representative of the boundary layer dynamics in this range of Graph $Po$. At very small Graph $Po\leq 0.11$, we observe only frequencies corresponding to the forcing at dimensionless frequency Graph $\varpi /\varOmega s=1$ and Graph $\varpi /\varOmega s=2$. Hence, we can use the velocity average along the chord Graph $\langle u x\rangle x$, where Graph $\langle \rangle x$ denotes the spatial average along Graph $x$, as a proxy for Graph $\omega y$. [Extracted from the article]
Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press 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
FullText Text:
  Availability: 0
Header DbId: egs
DbLabel: Engineering Source
An: 154376936
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
IllustrationInfo
Items – Name: Title
  Label: Title
  Group: Ti
  Data: Experimental study of the flows in a non-axisymmetric ellipsoid under precession.
– Name: Author
  Label: Authors
  Group: Au
  Data: <searchLink fieldCode="AR" term="%22Burmann%2C+Fabian%22">Burmann, Fabian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> fabian.burmann@erdw.ethz.ch</i><br /><searchLink fieldCode="AR" term="%22Noir%2C+Jérõme%22">Noir, Jérõme</searchLink><relatesTo>1</relatesTo> (AUTHOR)
– Name: TitleSource
  Label: Source
  Group: Src
  Data: <searchLink fieldCode="JN" term="%22Journal+of+Fluid+Mechanics%22">Journal of Fluid Mechanics</searchLink>. Feb2022, Vol. 932, p1-21. 21p.
– Name: Subject
  Label: Subjects
  Group: Su
  Data: <searchLink fieldCode="DE" term="%22Ellipsoids%22">Ellipsoids</searchLink><br /><searchLink fieldCode="DE" term="%22Astrophysical+fluid+dynamics%22">Astrophysical fluid dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Cartesian+coordinates%22">Cartesian coordinates</searchLink><br /><searchLink fieldCode="DE" term="%22Laminar+boundary+layer%22">Laminar boundary layer</searchLink><br /><searchLink fieldCode="DE" term="%22Rotational+motion%22">Rotational motion</searchLink><br /><searchLink fieldCode="DE" term="%22Rossby+number%22">Rossby number</searchLink><br /><searchLink fieldCode="DE" term="%22Rotating+fluid%22">Rotating fluid</searchLink><br /><searchLink fieldCode="DE" term="%22Stellar+rotation%22">Stellar rotation</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The angle between Graph $\boldsymbol {\varOmega } {\boldsymbol {p}}$ and Graph $\boldsymbol {\varOmega } {\boldsymbol {s}}$, i.e. the precession angle, is fixed to Graph $90^\circ$. Alternatively, since the fluid rotation is no longer close to the container axis, it may be argued that the asymptotic values of the damping coefficients Graph $\lambda r,\lambda i$ and Graph $\lambda {sup}$ are not representative of the boundary layer dynamics in this range of Graph $Po$. At very small Graph $Po\leq 0.11$, we observe only frequencies corresponding to the forcing at dimensionless frequency Graph $\varpi /\varOmega s=1$ and Graph $\varpi /\varOmega s=2$. Hence, we can use the velocity average along the chord Graph $\langle u x\rangle x$, where Graph $\langle \rangle x$ denotes the spatial average along Graph $x$, as a proxy for Graph $\omega y$. [Extracted from the article]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Fluid Mechanics is the property of Cambridge University Press 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=154376936
RecordInfo BibRecord:
  BibEntity:
    Identifiers:
      – Type: doi
        Value: 10.1017/jfm.2021.932
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 21
        StartPage: 1
    Subjects:
      – SubjectFull: Ellipsoids
        Type: general
      – SubjectFull: Astrophysical fluid dynamics
        Type: general
      – SubjectFull: Cartesian coordinates
        Type: general
      – SubjectFull: Laminar boundary layer
        Type: general
      – SubjectFull: Rotational motion
        Type: general
      – SubjectFull: Rossby number
        Type: general
      – SubjectFull: Rotating fluid
        Type: general
      – SubjectFull: Stellar rotation
        Type: general
    Titles:
      – TitleFull: Experimental study of the flows in a non-axisymmetric ellipsoid under precession.
        Type: main
  BibRelationships:
    HasContributorRelationships:
      – PersonEntity:
          Name:
            NameFull: Burmann, Fabian
      – PersonEntity:
          Name:
            NameFull: Noir, Jérõme
    IsPartOfRelationships:
      – BibEntity:
          Dates:
            – D: 10
              M: 02
              Text: Feb2022
              Type: published
              Y: 2022
          Identifiers:
            – Type: issn-print
              Value: 00221120
          Numbering:
            – Type: volume
              Value: 932
          Titles:
            – TitleFull: Journal of Fluid Mechanics
              Type: main
ResultId 1