25 citations · 52 across the 8 of their papers we have counts for
8 papers
Experimental Challenges in Determining Heat Transfer Efficiency Scaling in Highly Turbulent Cryogenic Rayleigh-Benard Convection
P. Urban, V. Musilova, P. Hanzelka +3
Cryogenic Rayleigh-Benard convection (RBC) at very high Rayleigh numbers (Ra) serves as a key system for understanding buoyancy-driven industrial and large scale natural flows and…
A removable temperature sensors holder for cryogenic Rayleigh-Bénard convection cell
Pavel Hanzelka, Ivan Vlcek, Pavel Urban
A removable holder carrying a set of miniature temperature sensors inside our Rayleigh-Bénard convection cylindrical cell has been developed. The sensors should not disturb the tem…
Thermal Waves and Heat Transfer Efficiency Enhancement in Harmonically Modulated Turbulent Thermal Convection
P. Urban, P. Hanzelka, T. Králík +2
We study turbulent Rayleigh-Bénard convection over four decades of Rayleigh numbers 4E8 < Ra < 2E12, while harmonically modulating the temperatures of the plates of our cylindrical…
Effect of boundary conditions in turbulent thermal convection
P. Urban, T. Králík, M. Macek +2
We report an experimental study aiming to clarify the role of boundary conditions (BC) in high Rayleigh number turbulent thermal convection of…
Thermal Radiation in Rayleigh-Bénard Convection Experiments
P. Urban, T. Králík, P. Hanzelka +4
An important question in turbulent Rayleigh-Bénard convection (RBC) is the effectiveness of convective heat transport, which is conveniently described via the scaling of the Nussel…
Device for measurement of thermal emissivity at cryogenic temperatures
Tomas Kralik, Pavel Hanzelka, Vera Musilova +1
In the described device, the thermal emissivity or absorptivity of the sample is measured by substitution of the radiative heat flow between two parallel surfaces by thermal output…
Design and testing of low temperature part of an UHV SPM microscope
Jiri Frolec, Jakub Vonka, Pavel Hanzelka +3
We have developed low temperature part of an ultra high vacuum scanning probe microscope (UHV-SPM) working at variable temperature within the range from 20 K to 700 K. To achieve t…
Factors influencing thermal radiative properties of metals
Tomas Kralik, Pavel Hanzelka, Vera Musilova +1
Data on thermal absorptivity and emissivity are important for calculations of heat flows in cryogenic devices. Although thermal radiative properties of materials used in cryogenics…