<?xml version="1.0" encoding="utf-8"?>
<TEI xmlns="http://www.tei-c.org/ns/1.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:hal="http://hal.archives-ouvertes.fr/" xmlns:gml="http://www.opengis.net/gml/3.3/" xmlns:gmlce="http://www.opengis.net/gml/3.3/ce" version="1.1" xsi:schemaLocation="http://www.tei-c.org/ns/1.0 http://api.archives-ouvertes.fr/documents/aofr-sword.xsd">
  <teiHeader>
    <fileDesc>
      <titleStmt>
        <title>HAL TEI export of hal-04085240</title>
      </titleStmt>
      <publicationStmt>
        <distributor>CCSD</distributor>
        <availability status="restricted">
          <licence target="https://creativecommons.org/publicdomain/zero/1.0/">CC0 1.0 - Universal</licence>
        </availability>
        <date when="2026-04-29T03:27:43+02:00"/>
      </publicationStmt>
      <sourceDesc>
        <p part="N">HAL API Platform</p>
      </sourceDesc>
    </fileDesc>
  </teiHeader>
  <text>
    <body>
      <listBibl>
        <biblFull>
          <titleStmt>
            <title xml:lang="en">Two-dimensional instabilities of a viscous vortex dipole</title>
            <author role="aut">
              <persName>
                <forename type="first">Rémi</forename>
                <surname>Jugier</surname>
              </persName>
              <idno type="halauthorid">1780607-0</idno>
              <affiliation ref="#struct-106820"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Laurent</forename>
                <surname>Joly</surname>
              </persName>
              <idno type="halauthorid">39151-0</idno>
              <affiliation ref="#struct-106820"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Pierre</forename>
                <surname>Brancher</surname>
              </persName>
              <email type="md5">48c287887142bee446e43047ea9d4128</email>
              <email type="domain">imft.fr</email>
              <idno type="idhal" notation="string">pierre-brancher</idno>
              <idno type="idhal" notation="numeric">1213270</idno>
              <idno type="halauthorid" notation="string">154555-1213270</idno>
              <idno type="ORCID">https://orcid.org/0000-0002-9919-0523</idno>
              <affiliation ref="#struct-690"/>
            </author>
            <author role="aut">
              <persName>
                <forename type="first">Jérôme</forename>
                <surname>Fontane</surname>
              </persName>
              <idno type="halauthorid">426379-0</idno>
              <affiliation ref="#struct-106820"/>
            </author>
            <editor role="depositor">
              <persName>
                <forename>Open Archive Toulouse Archive Ouverte</forename>
                <surname>(OATAO)</surname>
              </persName>
              <email type="md5">ac3f71840d50da799c1bb19c7b808bac</email>
              <email type="domain">listes-diff.inp-toulouse.fr</email>
            </editor>
          </titleStmt>
          <editionStmt>
            <edition n="v1" type="current">
              <date type="whenSubmitted">2023-04-28 16:05:09</date>
              <date type="whenModified">2025-10-22 18:04:09</date>
              <date type="whenReleased">2023-05-02 10:21:11</date>
              <date type="whenProduced">2015-06-29</date>
              <date type="whenEndEmbargoed">2023-04-28</date>
              <ref type="file" target="https://hal.science/hal-04085240v1/document">
                <date notBefore="2023-04-28"/>
              </ref>
              <ref type="file" subtype="author" n="1" target="https://hal.science/hal-04085240v1/file/fontane_14156.pdf" id="file-4085240-3556186">
                <date notBefore="2023-04-28"/>
              </ref>
            </edition>
            <respStmt>
              <resp>contributor</resp>
              <name key="146910">
                <persName>
                  <forename>Open Archive Toulouse Archive Ouverte</forename>
                  <surname>(OATAO)</surname>
                </persName>
                <email type="md5">ac3f71840d50da799c1bb19c7b808bac</email>
                <email type="domain">listes-diff.inp-toulouse.fr</email>
              </name>
            </respStmt>
          </editionStmt>
          <publicationStmt>
            <distributor>CCSD</distributor>
            <idno type="halId">hal-04085240</idno>
            <idno type="halUri">https://hal.science/hal-04085240</idno>
            <idno type="halBibtex">jugier:hal-04085240</idno>
            <idno type="halRefHtml">&lt;i&gt;HELIX 2015 : Fluid-Structure Interactions and Vortex Dynamics in Aerodynamics&lt;/i&gt;, Jun 2015, Île de Porquerolles, France. pp.1-1</idno>
            <idno type="halRef">HELIX 2015 : Fluid-Structure Interactions and Vortex Dynamics in Aerodynamics, Jun 2015, Île de Porquerolles, France. pp.1-1</idno>
            <availability status="restricted">
              <licence target="https://about.hal.science/hal-authorisation-v1/">HAL Authorization<ref corresp="#file-4085240-3556186"/></licence>
            </availability>
          </publicationStmt>
          <seriesStmt>
            <idno type="stamp" n="UNIV-TLSE3">Université de Toulouse</idno>
            <idno type="stamp" n="CNRS">CNRS - Centre national de la recherche scientifique</idno>
            <idno type="stamp" n="IMFT">Institut mécanique des fluides de Toulouse</idno>
            <idno type="stamp" n="TOULOUSE-INP">Toulouse - INP</idno>
            <idno type="stamp" n="UNIV-UT3">Université Toulouse 3</idno>
            <idno type="stamp" n="UT3-INP">Université de Toulouse / Toulouse INP</idno>
            <idno type="stamp" n="UT3-TOULOUSEINP">Université de Toulouse / Toulouse INP</idno>
            <idno type="stamp" n="ISAE-SUPAERO">Institut Supérieur de l'Aéronautique et de l'Espace</idno>
          </seriesStmt>
          <notesStmt>
            <note type="audience" n="2">International</note>
            <note type="invited" n="0">No</note>
            <note type="popular" n="0">No</note>
            <note type="peer" n="1">Yes</note>
            <note type="proceedings" n="0">No</note>
          </notesStmt>
          <sourceDesc>
            <biblStruct>
              <analytic>
                <title xml:lang="en">Two-dimensional instabilities of a viscous vortex dipole</title>
                <author role="aut">
                  <persName>
                    <forename type="first">Rémi</forename>
                    <surname>Jugier</surname>
                  </persName>
                  <idno type="halauthorid">1780607-0</idno>
                  <affiliation ref="#struct-106820"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Laurent</forename>
                    <surname>Joly</surname>
                  </persName>
                  <idno type="halauthorid">39151-0</idno>
                  <affiliation ref="#struct-106820"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Pierre</forename>
                    <surname>Brancher</surname>
                  </persName>
                  <email type="md5">48c287887142bee446e43047ea9d4128</email>
                  <email type="domain">imft.fr</email>
                  <idno type="idhal" notation="string">pierre-brancher</idno>
                  <idno type="idhal" notation="numeric">1213270</idno>
                  <idno type="halauthorid" notation="string">154555-1213270</idno>
                  <idno type="ORCID">https://orcid.org/0000-0002-9919-0523</idno>
                  <affiliation ref="#struct-690"/>
                </author>
                <author role="aut">
                  <persName>
                    <forename type="first">Jérôme</forename>
                    <surname>Fontane</surname>
                  </persName>
                  <idno type="halauthorid">426379-0</idno>
                  <affiliation ref="#struct-106820"/>
                </author>
              </analytic>
              <monogr>
                <title level="m">HELIX 2015 : Proceedings of Fluid-Structure Interactions and Vortex Dynamics in Aerodynamics</title>
                <meeting>
                  <title>HELIX 2015 : Fluid-Structure Interactions and Vortex Dynamics in Aerodynamics</title>
                  <date type="start">2015-06-29</date>
                  <date type="end">2015-07-04</date>
                  <settlement>Île de Porquerolles</settlement>
                  <country key="FR">France</country>
                </meeting>
                <imprint>
                  <biblScope unit="pp">1-1</biblScope>
                  <date type="datePub">2015-07</date>
                </imprint>
              </monogr>
            </biblStruct>
          </sourceDesc>
          <profileDesc>
            <langUsage>
              <language ident="en">English</language>
            </langUsage>
            <textClass>
              <keywords scheme="author">
                <term xml:lang="en">Vortex dipole</term>
                <term xml:lang="en">Instabilities</term>
              </keywords>
              <classCode scheme="halDomain" n="spi.meca">Engineering Sciences [physics]/Mechanics [physics.med-ph]</classCode>
              <classCode scheme="halDomain" n="spi.meca.mefl">Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]</classCode>
              <classCode scheme="halTypology" n="COMM">Conference papers</classCode>
              <classCode scheme="halOldTypology" n="COMM">Conference papers</classCode>
              <classCode scheme="halTreeTypology" n="COMM">Conference papers</classCode>
            </textClass>
            <abstract xml:lang="en">
              <p>We extend the linear stability analysis of the inviscid Lamb-Chaplygin dipole (LCD) carried out by Brion et al. to a family of viscous Lamb-Oseen dipoles (LOD) for varying aspect ratios a/b, where a is the characteristic radius of the vortices and b their separation distance.Brion et al. have recently discovered a new family of modes which correspond to a large-wavelength instability with a maximum growth rate in the two-dimensional (2D) limit. Their study suggests that vortex shedding in the wake of the dipole is the leading physical mechanism of those instabilities. Though the LCD is a peculiar model of vortex dipole, since it does not exhibit any viscous trail and presents a singular vorticity distribution, Brion et al. compared their results with the more regular LOD defined by Sipp et al. and confirmed the existence of a 2D instability of vortex dipoles.Despite a similar structure, the instability of the LOD presents an oscillating symmetric mode and growth rates that are significantly different from the LCD. The present study investigates these differences by looking at the influence of the dipole aspect ratio on the characteristics of the unstable 2D modes. The results show that the growth rate of both antisymmetric and symmetric modes presents some nontrivial variations with a/band Re: it increases with decreasing Reynolds number and a stationary antisymmetric branch emerges for low aspect ratios. The analysis of the time evolution of the modes allows to highlight the basic mechanisms at play.</p>
            </abstract>
          </profileDesc>
        </biblFull>
      </listBibl>
    </body>
    <back>
      <listOrg type="structures">
        <org type="laboratory" xml:id="struct-106820" status="VALID">
          <orgName>Département Aérodynamique Energétique et Propulsion</orgName>
          <orgName type="acronym">DAEP</orgName>
          <desc>
            <address>
              <addrLine>10 av. Edouard Belin BP 54032 31055 TOULOUSE Cedex 4</addrLine>
              <country key="FR"/>
            </address>
          </desc>
          <listRelation>
            <relation active="#struct-82720" type="direct"/>
          </listRelation>
        </org>
        <org type="laboratory" xml:id="struct-690" status="OLD">
          <idno type="IdRef">058487387</idno>
          <idno type="ISNI">0000 0004 0614 3424</idno>
          <idno type="RNSR">199511946L</idno>
          <idno type="ROR">https://ror.org/025nmxp11</idno>
          <orgName>Institut de mécanique des fluides de Toulouse</orgName>
          <orgName type="acronym">IMFT</orgName>
          <date type="start">1930-01-01</date>
          <date type="end">2025-01-01</date>
          <desc>
            <address>
              <addrLine>Allée du Professeur Camille Soula31400 ToulouseFrance</addrLine>
              <country key="FR"/>
            </address>
            <ref type="url">http://www.imft.fr/</ref>
          </desc>
          <listRelation>
            <relation active="#struct-217752" type="direct"/>
            <relation active="#struct-443875" type="indirect"/>
            <relation name="UMR5502" active="#struct-441569" type="direct"/>
            <relation active="#struct-448187" type="direct"/>
          </listRelation>
        </org>
        <org type="institution" xml:id="struct-82720" status="VALID">
          <idno type="ROR">https://ror.org/04gyj6s21</idno>
          <orgName>Institut Supérieur de l'Aéronautique et de l'Espace</orgName>
          <orgName type="acronym">ISAE-SUPAERO</orgName>
          <desc>
            <address>
              <addrLine>ISAE - 10 av. Edouard Belin - BP 54032 - 31055 TOULOUSE Cedex 4</addrLine>
              <country key="FR"/>
            </address>
            <ref type="url">https://www.isae-supaero.fr/fr/</ref>
          </desc>
        </org>
        <org type="institution" xml:id="struct-217752" status="OLD">
          <idno type="IdRef">026404672</idno>
          <idno type="ISNI">0000000121617331</idno>
          <idno type="ROR">https://ror.org/02v6kpv12</idno>
          <idno type="Wikidata">Q1273188</idno>
          <orgName>Université Toulouse III - Paul Sabatier</orgName>
          <orgName type="acronym">UT3</orgName>
          <date type="end">2025-01-01</date>
          <desc>
            <address>
              <addrLine>118 route de Narbonne - 31062 Toulouse</addrLine>
              <country key="FR"/>
            </address>
            <ref type="url">http://www.univ-tlse3.fr/</ref>
          </desc>
          <listRelation>
            <relation active="#struct-443875" type="direct"/>
          </listRelation>
        </org>
        <org type="regroupinstitution" xml:id="struct-443875" status="VALID">
          <idno type="ROR">https://ror.org/017tgbk05</idno>
          <orgName>Communauté d'universités et établissements de Toulouse</orgName>
          <orgName type="acronym">Comue de Toulouse</orgName>
          <desc>
            <address>
              <addrLine>41 Allée Jules Guesde, 31000 Toulouse</addrLine>
              <country key="FR"/>
            </address>
            <ref type="url">https://www.univ-toulouse.fr/</ref>
          </desc>
        </org>
        <org type="regroupinstitution" xml:id="struct-441569" status="VALID">
          <idno type="IdRef">02636817X</idno>
          <idno type="ISNI">0000000122597504</idno>
          <idno type="ROR">https://ror.org/02feahw73</idno>
          <orgName>Centre National de la Recherche Scientifique</orgName>
          <orgName type="acronym">CNRS</orgName>
          <date type="start">1939-10-19</date>
          <desc>
            <address>
              <country key="FR"/>
            </address>
            <ref type="url">https://www.cnrs.fr/</ref>
          </desc>
        </org>
        <org type="institution" xml:id="struct-448187" status="VALID">
          <idno type="IdRef">026388820</idno>
          <idno type="ISNI">0000000121766169</idno>
          <idno type="ROR">https://ror.org/033p9g875</idno>
          <orgName>Institut National Polytechnique (Toulouse)</orgName>
          <orgName type="acronym">Toulouse INP</orgName>
          <desc>
            <address>
              <country key="FR"/>
            </address>
            <ref type="url">https://www.inp-toulouse.fr/</ref>
          </desc>
          <listRelation>
            <relation active="#struct-443875" type="direct"/>
          </listRelation>
        </org>
      </listOrg>
    </back>
  </text>
</TEI>