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Rayleigh-Bénard Convection in Liquid metal under Influence of Vertical Magnetic Fields

Schindler, Felix; Zürner, Till; Vogt, Tobias; Eckert, Sven; Schumacher, Jörg


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    <dct:title>Rayleigh-Bénard Convection in Liquid metal under Influence of Vertical Magnetic Fields</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2019</dct:issued>
    <dcat:keyword>Rayleigh-Bénard convection</dcat:keyword>
    <dcat:keyword>magnetohydrodynamics</dcat:keyword>
    <dcat:keyword>low Prandtl number</dcat:keyword>
    <dcat:keyword>liquid metal</dcat:keyword>
    <dcat:keyword>ultrasound velocimetry</dcat:keyword>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2019-11-23</dct:issued>
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    <dct:description>&lt;p&gt;Conference (Lecture):&lt;/p&gt; &lt;p&gt;American Physics Society (APS) DFD meeting 2019 Seattle&lt;/p&gt; &lt;p&gt;In the presented Rayleigh-B&amp;eacute;nard convection experiments the turbulent 3d-&lt;br&gt; flow of the liquid gallium-indium-tin alloy is investigated by use of ultrasound&lt;br&gt; Doppler velocimetry, temperature and contactless inductive flow tomography&lt;br&gt; measurements. We reconstruct for the first time near-wall as well as bulk&lt;br&gt; flow, momentum and heat transport as well as long-term behaviour of the large-scale liquid&lt;br&gt; metal flow at a low Prandtl number of 0.029 and high Rayleigh numbers up&lt;br&gt; to 6 &amp;middot; 10e7. Also the influence of a strong magnetic field on the turbulent liquid metal is investigated. The results of the&lt;br&gt; experiments are compared to direct numerical simulations and other experiments. These are also&lt;br&gt; considered for the interpretation of the measured turbulence statistics.&lt;br&gt; Our experiments aim to provide a deeper understanding of the turbulent&lt;br&gt; convection and its interaction with magnetic fields in turbulent low Prandtl number&lt;br&gt; flows as those in molten steel, aluminium or geo- and astrophysical flows.&lt;/p&gt; &lt;p&gt;&amp;nbsp;&lt;/p&gt;</dct:description>
    <dct:description xml:lang="">Supported by Deutsche Forschungsgemeinschaft with grants VO 2332/1-1 and SCHU 1410/29-1</dct:description>
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