Master's Thesis
Temperature profiles and temperature fluctuations in turbulent Rayleigh-Bénard convection
Final Thesis 9.27 MBAuthor of thesis: Ing. Jakub Drahotský
Acad. year: 2017/2018
Supervisor: Ing. Pavel Urban, Ph.D.
Reviewer: Dr. Marco La Mantia, Ph.D.
Abstract:This work describes experimental research directed at the study of vertical temperature profiles and fluctuations in the turbulent Rayleigh-Bénard convection. Experiments took place in Barrel of Ilmenau containing the cylindrical experimental cell with a diameter of 7.15 m and the height of 4.70 m (the aspect ratio Γ = 1.5) filled with dry air. The temperature profiles and fluctuations were studied along the vertical axis of the cell between the top and bottom plates within the range of Rayleigh number (Ra) of
1E11 − 4E12. The temperature profiles were measured by a novel method using the optical fibre system Luna ODiSI-B which was purchased by the team in Ilmenau. The system permits to measure the temperature profile simultaneously along the whole optical fibre length with a spatial resolution of 5 mm.
Rayleigh-Bénard convection, Barrel of Ilmenau, temperature profiles, temperature fluctuations, Luna ODiSI-B, Optical Distributed Sensor Interrogator
Date of defence
19.06.2018
Result of the defence
Defended (thesis was successfully defended)
Grading
A
Process of defence
Jaká jsou okrajové podmínky experimentu, který jste prováděl? Jaký význam mají veličiny autokorelace a cross korelace a jak jsou definovány? Můžete vysvělit aproximace hustoty vzduchu v Navierově-Stokesově rovnici, které používáte?
Language of thesis
English
Faculty
Department
Study programme
Applied Sciences in Engineering (M2A-P)
Field of study
Physical Engineering and Nanotechnology (M-FIN)
Composition of Committee
prof. RNDr. Tomáš Šikola, CSc. (předseda)
prof. RNDr. Miroslav Liška, DrSc. (místopředseda)
prof. RNDr. Bohumila Lencová, CSc. (člen)
prof. RNDr. Jiří Komrska, CSc. (člen)
prof. RNDr. Petr Dub, CSc. (člen)
prof. RNDr. Radim Chmelík, Ph.D. (člen)
prof. RNDr. Jiří Spousta, Ph.D. (člen)
prof. RNDr. Eduard Schmidt, CSc. (člen)
prof. RNDr. Pavel Zemánek, Ph.D. (člen)
RNDr. Antonín Fejfar, CSc. (člen)
doc. Ing. Radek Kalousek, Ph.D. (člen)
Supervisor’s report
Ing. Pavel Urban, Ph.D.
Grade proposed by supervisor: A
Reviewer’s report
Dr. Marco La Mantia, Ph.D.
Grade proposed by reviewer: A
Responsibility: Mgr. et Mgr. Hana Odstrčilová