<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>11515</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>255</pageFirst>
    <pageLast>297</pageLast>
    <pageNumber/>
    <edition/>
    <issue>vol. 751</issue>
    <volume/>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2014-07-03</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Inertial wave excitation and focusing in a liquid bounded by a frustum and a cylinder</title>
    <abstract language="eng">The mechanism of localized inertial wave excitation and its efﬁciency is investigated for an annular cavity rotating with Ω0 . Meridional symmetry is broken by replacing&#13;
the inner cylinder with a truncated cone (frustum). Waves are excited by individual longitudinal libration of the walls. The geometry is non-separable and exhibits wave&#13;
focusing and wave attractors. We investigated laboratory and numerical results for the Ekman number E ≈ 10−6. inclination α = 5.71◦ and libration amplitudes ε 0.2 within the inertial wave band 0 &lt; ω &lt; 2Ω0 . Under the assumption that the inertial waves do not essentially affect the boundary-layer structure, we use classical boundary-layer analysis to study oscillating Ekman layers over a librating wall that is at an angle α = 0 to the axis of rotation. The Ekman layer erupts at frequency ω = f∗, where f∗ ≡ 2Ω0 sin α is the effective Coriolis parameter in a plane tangential to the wall. For&#13;
the selected inclination this eruption occurs for the forcing frequency ω/Ω0 = 0.2. For the librating lids eruption occurs at ω/Ω0 = 2. The study reveals that the frequency dependence of the total kinetic energy Kω of the excited wave ﬁeld is strongly connected to the square of the Ekman pumping velocity wE (ω) that, in the linear limit, becomes singular when the boundary layer erupts. This explains the frequency dependence of non-resonantly excited waves. By the localization of the forcing, the two conﬁgurations investigated, (i) frustum libration and (ii) lids together with outer cylinder in libration, can be clearly distinguished by their response spectra. Good agreement was found for the spatial structure of low-order wave attractors and periodic orbits (both characterized by a small number of reﬂections) in the frequency windows predicted by geometric ray tracing. For ‘resonant’ frequencies a signiﬁcantly increased total bulk energy was found, while the energy in the boundary layer remained nearly constant. Inertial wave energy enters the bulk ﬂow via corner beams, which are parallel to the characteristics of the underlying Poincaré problem. Numerical simulations revealed a mismatch between the wall-parallel mass ﬂuxes&#13;
near the corners. This leads to boundary-layer eruption and the generation of inertial waves in the corners.</abstract>
    <parentTitle language="eng">Journal of Fluid Mechanics</parentTitle>
    <identifier type="doi">10.1017/jfm.2014.304</identifier>
    <identifier type="issn">1750-6859</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Marten</firstName>
      <lastName>Klein</lastName>
    </author>
    <submitter>
      <firstName>Silke</firstName>
      <lastName>Kaschwich</lastName>
    </submitter>
    <author>
      <firstName>Torsten</firstName>
      <lastName>Seelig</lastName>
    </author>
    <author>
      <firstName>Michael V.</firstName>
      <lastName>Kurgansky</lastName>
    </author>
    <author>
      <firstName>Abouzar</firstName>
      <lastName>Ghasemi</lastName>
    </author>
    <author>
      <firstName>Ion-Dan</firstName>
      <lastName>Borcia</lastName>
    </author>
    <author>
      <firstName>Andreas</firstName>
      <lastName>Will</lastName>
    </author>
    <author>
      <firstName>Eberhard</firstName>
      <lastName>Schaller</lastName>
    </author>
    <author>
      <firstName>Christoph</firstName>
      <lastName>Egbers</lastName>
    </author>
    <author>
      <firstName>Uwe</firstName>
      <lastName>Harlander</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>boundary-layer structure</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>geophysical and geological ﬂows</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>waves in rotating ﬂuids</value>
    </subject>
    <collection role="old_institute" number="03014">LS Aerodynamik und Strömungslehre</collection>
    <collection role="old_institute" number="04026">LS Umweltmeteorologie</collection>
    <collection role="institutes" number="2401">FG Atmosphärische Prozesse</collection>
    <collection role="institutes" number="3501">FG Aerodynamik und Strömungslehre</collection>
  </doc>
  <doc>
    <id>14709</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2015-10-27</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">DNS of inertial wave attractors in a librating annulus with height-dependent gap width</title>
    <abstract language="eng">Direct numerical simulations (DNS) of inertial wave attractors have been carried out in a librating Taylor-Couette system with broken mirror symmetry in the radial-axial cross-section. The inertial wave excitation mechanism and its localisation at the edges was clarified by applying boundary layer theory. Additional resonance peaks in the simulated response spectra were found to agree with low-order wave attractors obtained by geometric ray tracing. Numerics and theory are in qualitative agreement with recent lab experiments.</abstract>
    <parentTitle language="eng">15th European turbulence conference (ETC), Delft, The Netherlands (2015)</parentTitle>
    <identifier type="url">http://www.etc15.nl/proceedings/proceedings/documents/134.pdf</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Marten</firstName>
      <lastName>Klein</lastName>
    </author>
    <submitter>
      <firstName>Silke</firstName>
      <lastName>Kaschwich</lastName>
    </submitter>
    <author>
      <firstName>Abouzar</firstName>
      <lastName>Ghasemi</lastName>
    </author>
    <author>
      <firstName>Torsten</firstName>
      <lastName>Seelig</lastName>
    </author>
    <author>
      <firstName>Ion-Dan</firstName>
      <lastName>Borcia</lastName>
    </author>
    <author>
      <firstName>Uwe</firstName>
      <lastName>Harlander</lastName>
    </author>
    <author>
      <firstName>Andreas</firstName>
      <lastName>Will</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>direct numerical simulations</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>geophysical and astrophysical turbulence</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>waves in rotating ﬂuids</value>
    </subject>
    <collection role="old_institute" number="03014">LS Aerodynamik und Strömungslehre</collection>
    <collection role="old_institute" number="04026">LS Umweltmeteorologie</collection>
    <collection role="institutes" number="2401">FG Atmosphärische Prozesse</collection>
    <collection role="institutes" number="3501">FG Aerodynamik und Strömungslehre</collection>
  </doc>
  <doc>
    <id>14700</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>European Geophysical Society</publisherName>
    <publisherPlace>Katlenburg-Lindau</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2015-10-26</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Mean flow generation and inertial wave attractors in a librating annulus: DNS and theory</title>
    <parentTitle language="eng">European Geosciences Union, General Assembly 2015, Vienna, Austria, 13 April - 17 May 2015</parentTitle>
    <identifier type="url">http://meetingorganizer.copernicus.org/EGU2015/EGU2015-15640-1.pdf</identifier>
    <note>EGU2015-15640-1</note>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="UBICOseries">Geophysical Research Abstracts ; 17</enrichment>
    <author>
      <firstName>Marten</firstName>
      <lastName>Klein</lastName>
    </author>
    <submitter>
      <firstName>Silke</firstName>
      <lastName>Kaschwich</lastName>
    </submitter>
    <author>
      <firstName>Abouzar</firstName>
      <lastName>Ghasemi</lastName>
    </author>
    <author>
      <firstName>Torsten</firstName>
      <lastName>Seelig</lastName>
    </author>
    <author>
      <firstName>Ion-Dan</firstName>
      <lastName>Borcia</lastName>
    </author>
    <author>
      <firstName>Uwe</firstName>
      <lastName>Harlander</lastName>
    </author>
    <author>
      <firstName>Andreas</firstName>
      <lastName>Will</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>boundary-layer structure</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>direct numerical simulation</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>instability</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>waves in rotating ﬂuids</value>
    </subject>
    <collection role="old_institute" number="03014">LS Aerodynamik und Strömungslehre</collection>
    <collection role="old_institute" number="04026">LS Umweltmeteorologie</collection>
    <collection role="institutes" number="2401">FG Atmosphärische Prozesse</collection>
    <collection role="institutes" number="3501">FG Aerodynamik und Strömungslehre</collection>
  </doc>
  <doc>
    <id>14706</id>
    <completedYear/>
    <publishedYear>2015</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>122</pageFirst>
    <pageLast>123</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace>Cottbus</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2015-10-27</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">DNS of inertial wave attractors in a librating annular cavity with a height-dependent gap</title>
    <parentTitle language="eng">ICTW 19, Book of Abstracts, 19th International Couette-Taylor Workshop, June 24 - 26, 2015 Cottbus, Germany</parentTitle>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Marten</firstName>
      <lastName>Klein</lastName>
    </author>
    <submitter>
      <firstName>Silke</firstName>
      <lastName>Kaschwich</lastName>
    </submitter>
    <author>
      <firstName>Abouzar</firstName>
      <lastName>Ghasemi</lastName>
    </author>
    <author>
      <firstName>Torsten</firstName>
      <lastName>Seelig</lastName>
    </author>
    <author>
      <firstName>Ion-Dan</firstName>
      <lastName>Borcia</lastName>
    </author>
    <author>
      <firstName>Uwe</firstName>
      <lastName>Harlander</lastName>
    </author>
    <author>
      <firstName>Andreas</firstName>
      <lastName>Will</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>waves in rotating ﬂuids</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>geophysical and geological ﬂows</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>direct numerical simulations</value>
    </subject>
    <collection role="old_institute" number="03014">LS Aerodynamik und Strömungslehre</collection>
    <collection role="old_institute" number="04026">LS Umweltmeteorologie</collection>
    <collection role="institutes" number="2401">FG Atmosphärische Prozesse</collection>
    <collection role="institutes" number="3501">FG Aerodynamik und Strömungslehre</collection>
  </doc>
  <doc>
    <id>15149</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>2</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2016-03-18</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Inertial Waves and Wave Excitation Mechanisms in Annular Cavities: Simulations, Experiments and Theory</title>
    <parentTitle language="eng">European Turbulence Conference ETC14, Lyon, 2013</parentTitle>
    <identifier type="url">http://etc14.ens-lyon.fr/etc-14-proceedings/accepted-talks</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <author>
      <firstName>Marten</firstName>
      <lastName>Klein</lastName>
    </author>
    <submitter>
      <firstName>Marten</firstName>
      <lastName>Klein</lastName>
    </submitter>
    <author>
      <firstName>Ion-Dan</firstName>
      <lastName>Borcia</lastName>
    </author>
    <author>
      <firstName>Christoph</firstName>
      <lastName>Egbers</lastName>
    </author>
    <author>
      <firstName>Abouzar</firstName>
      <lastName>Ghasemi</lastName>
    </author>
    <author>
      <firstName>Uwe</firstName>
      <lastName>Harlander</lastName>
    </author>
    <author>
      <firstName>Michael V.</firstName>
      <lastName>Kurgansky</lastName>
    </author>
    <author>
      <firstName>Eberhard</firstName>
      <lastName>Schaller</lastName>
    </author>
    <author>
      <firstName>Torsten</firstName>
      <lastName>Seelig</lastName>
    </author>
    <author>
      <firstName>Andreas</firstName>
      <lastName>Will</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>boundary-layer structure</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>geophysical and geological ﬂows</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>waves in rotating ﬂuids</value>
    </subject>
    <collection role="old_institute" number="03014">LS Aerodynamik und Strömungslehre</collection>
    <collection role="old_institute" number="04026">LS Umweltmeteorologie</collection>
    <collection role="institutes" number="2401">FG Atmosphärische Prozesse</collection>
    <collection role="institutes" number="3501">FG Aerodynamik und Strömungslehre</collection>
  </doc>
  <doc>
    <id>15151</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>European Geophysical Society</publisherName>
    <publisherPlace>Katlenburg-Lindau</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2016-03-18</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Inertial wave excitation and wave attractors in a librating annulus: DNS</title>
    <parentTitle language="eng">European Geosciences Union, General Assembly 2014, Vienna, Austria, 27 April – 02 May 2014</parentTitle>
    <note>EGU2014-15585</note>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="UBICOseries">Geophysical Research Abstracts ; 16</enrichment>
    <author>
      <firstName>Marten</firstName>
      <lastName>Klein</lastName>
    </author>
    <submitter>
      <firstName>Marten</firstName>
      <lastName>Klein</lastName>
    </submitter>
    <author>
      <firstName>Abouzar</firstName>
      <lastName>Ghasemi</lastName>
    </author>
    <author>
      <firstName>Uwe</firstName>
      <lastName>Harlander</lastName>
    </author>
    <author>
      <firstName>Andreas</firstName>
      <lastName>Will</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>boundary-layer structure</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>geophysical and geological ﬂows</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>waves in rotating ﬂuids</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>direct numerical simulations</value>
    </subject>
    <collection role="old_institute" number="03014">LS Aerodynamik und Strömungslehre</collection>
    <collection role="old_institute" number="04026">LS Umweltmeteorologie</collection>
    <collection role="institutes" number="2401">FG Atmosphärische Prozesse</collection>
    <collection role="institutes" number="3501">FG Aerodynamik und Strömungslehre</collection>
  </doc>
</export-example>
