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true 3.1 HZDR.RODARE 10.14278/rodare.232 Schindler, Felix Zürner, Till Vogt, Tobias 0000-0002-0022-5758 Eckert, Sven 0000-0003-1639-5417 Schumacher, Jörg Rodare 2019 Rayleigh-Bénard convection magnetohydrodynamics low Prandtl number liquid metal ultrasound velocimetry 2019-11-23 en Presentation https://rodare.hzdr.de/record/232 10.1017/jfm.2019.556 10.1017/jfm.2019.556 https://www.hzdr.de/publications/Publ-30444 10.14278/rodare.231 https://rodare.hzdr.de/communities/fwd https://rodare.hzdr.de/communities/hzdr https://rodare.hzdr.de/communities/rodare V1.1 Creative Commons Attribution 4.0 International Open Access <p>Conference (Lecture):</p> <p>American Physics Society (APS) DFD meeting 2019 Seattle</p> <p>In the presented Rayleigh-B&eacute;nard convection experiments the turbulent 3d-<br> flow of the liquid gallium-indium-tin alloy is investigated by use of ultrasound<br> Doppler velocimetry, temperature and contactless inductive flow tomography<br> measurements. We reconstruct for the first time near-wall as well as bulk<br> flow, momentum and heat transport as well as long-term behaviour of the large-scale liquid<br> metal flow at a low Prandtl number of 0.029 and high Rayleigh numbers up<br> to 6 &middot; 10e7. Also the influence of a strong magnetic field on the turbulent liquid metal is investigated. The results of the<br> experiments are compared to direct numerical simulations and other experiments. These are also<br> considered for the interpretation of the measured turbulence statistics.<br> Our experiments aim to provide a deeper understanding of the turbulent<br> convection and its interaction with magnetic fields in turbulent low Prandtl number<br> flows as those in molten steel, aluminium or geo- and astrophysical flows.</p> <p>&nbsp;</p> Supported by Deutsche Forschungsgemeinschaft with grants VO 2332/1-1 and SCHU 1410/29-1 {"references": ["10.1017/jfm.2019.556"]}