Visualization of selected flows of superfluid helium using solid hydrogen tracer particles
| Thesis title in Czech: | Vizualizace vybraných proudění supratekutého hélia s využitím částic pevného vodíku |
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| Thesis title in English: | Visualization of selected flows of superfluid helium using solid hydrogen tracer particles |
| Key words: | Tepelný protiproud v supratekutém héliu 4, kvantová turbulence v supratekutém héliu 4, sledování trasovacích částic, rozdělení rychlostí, rozdělení zrychlení |
| English key words: | Thermal counterflow in superfluid 4He, quantum turbulence in superfluid 4He, particle tracking velocimetry, probability density function of velocity, probability density function of acceleration |
| Academic year of topic announcement: | 2011/2012 |
| Thesis type: | diploma thesis |
| Thesis language: | angličtina |
| Department: | Department of Low Temperature Physics (32-KFNT) |
| Supervisor: | prof. RNDr. Ladislav Skrbek, DrSc. |
| Author: | hidden - assigned and confirmed by the Study Dept. |
| Date of registration: | 08.11.2011 |
| Date of assignment: | 08.11.2011 |
| Confirmed by Study dept. on: | 15.04.2013 |
| Date and time of defence: | 14.05.2013 00:00 |
| Date of electronic submission: | 09.04.2013 |
| Date of submission of printed version: | 12.04.2013 |
| Date of proceeded defence: | 14.05.2013 |
| Opponents: | Simone Babuin, Ph.D. |
| Advisors: | doc. Dr. Marco La Mantia, Ph.D. |
| Guidelines |
| Flow visualisation techniques have recently been applied for the investigation of various cryogenic flows of liquid helium. One of them, particle tracking velocimetry technique with frozen flakes of hydrogen and hydrogen-deuterium mixture of micron size as tracers, has recently been implemented in our Laboratory and will be utilized for the analysis of selected flows of superfluid helium. The results will be compared with complementary experiments in classical viscous fluids. The technique will be optimised in various ways, in view of a number of technical and fundamental difficulties. |
| References |
| L. Skrbek a kol., Fyzika nízkých teplot, Matfyzpress 2011
DR Tilley, J Tilley, 1990, Superfluidity and superconductivity, Institute of Physics Publishing; SW Van Sciver and CF Barenghi, 2009, Visualisation of quantum turbulence, Progress in Low Temperature Physics: Quantum Turbulence, Springer, 247-303 |