Temperature profiles measurements in turbulent Rayleigh-Bénard convection by optical fibre system at the Barrel of II-menau

0491319 - ÚPT 2019 RIV FR eng C - Conference Paper (international conference)
Drahotský, Jakub - Hanzelka, Pavel - Musilová, Věra - Macek, Michal - Du Puits, R. - Urban, Pavel
Temperature profiles measurements in turbulent Rayleigh-Bénard convection by optical fibre system at the Barrel of II-menau.
EPJ Web of Conferences. Vol. 180. Paris: EDP Sciences, 2018, č. článku 02020. ISSN 2101-6275. E-ISSN 2100-014X.
[International Conference on Experimental Fluid Mechanics, EFM 2017 /12./. Mikulov (CZ), 21.11.2017-24.11.2017]
R&D Projects: GA ČR(CZ) GA17-03572S; GA MŠMT(CZ) LO1212
Institutional support: RVO:68081731
Keywords : temperature profiles measurements * Rayleigh-Bénard convection
OECD category: Fluids and plasma physics (including surface physics)

The Authors, published by EDP Sciences, 2018. Modelling of large-scale natural (thermally-generated) turbulent flows (such as the turbulent convection in Earth's atmosphere, oceans, or Sun) is approached in laboratory experiments in the simplified model system called the Rayleigh-Bénard convection (RBC). We present preliminary measurements of vertical temperature profiles in the cell with the height of 4:7 m, 7:15m in diameter, obtained at the Barrel of Ilmenau (BOI), the worldwide largest experimental setup to study highly turbulent RBC, newly equipped with the Luna ODiSI-B optical fibre system. In our configuration, the system permits to measure the temperature with a high spatial resolution of 5mm along a very thin glass optical fibre with the length of 5m and seems to be perfectly suited for measurement of time series of instantaneous vertical temperature profiles. The system was supplemented with the two Pt100 vertically movable probes specially designed by us for reference temperature profiles measurements.
Permanent Link: http://hdl.handle.net/11104/0285308