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Structure of thermal boundary layers in turbulent Rayleigh-Bénard convection
temperature difference was kept constant, whereas in the second series the aspect ratio was set to its lowest possible value, Γ =1 .13, and Ra was varied by changing the temperature difference. WeExpand
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A universal noncontact flowmeter for liquids
Lorentz force velocimetry (LFV) is a noncontact electromagnetic flow measurement technique for liquid metals that is currently used in fundamental research and metallurgy. Up to now, the applicationExpand
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Oscillations of the large scale wind in turbulent thermal convection
The large scale "wind of turbulence" of thermally driven flow is analyzed for very large Rayleigh numbers between 4·1011 and 7·1011 and Prandtl number of 0.71 (air at 40 °C) and aspect ratios orderExpand
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Breakdown of wind in turbulent thermal convection.
We report experiments on turbulent Rayleigh-Bénard convection of air in a cylindrical large-scale facility with a diameter of 7 meters and Rayleigh numbers up to Ra approximately 10(12). The facilityExpand
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Flow rate measurement of weakly conducting fluids using Lorentz force velocimetry
We present a novel application of a contactless flow measurement system and validate its feasibility on an electrolyte pipe flow. The device relies on the technique of Lorentz force velocimetryExpand
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Measurement of large-scale flow structures in air using a novel 3D particle tracking velocimetry technique
We report about the development and application of a novel flow measurement technique for convective flows in air. 3D particle tracking velocimetry is used to investigate large-scale flow pattern andExpand
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A Novel Contactless Flow Rate Measurement Device for Weakly Conducting Fluids Based on Lorentz Force Velocimetry
This paper presents an improved experimental setup for the contactless flow rate measurement in a weakly electrically conducting fluid on the base of Lorentz force velocimetry (LFV) and discusses theExpand
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Extended Three Dimensional Particle Tracking Velocimetry for Large Enclosures
An extended three-dimensional particle tracking velocimetry (3D PTV) technique for the determination of trajectories, velocity vectors and flow pattern within a large cylindrical observation volumeExpand
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Mean velocity profile in confined turbulent convection.
In this Letter, highly resolved measurements of the horizontal velocity inside the boundary layer of turbulent Rayleigh-Bénard convection are reported. They were performed in a cylindrical box withExpand
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Investigation of thermal convection in water columns using particle image velocimetry
Particle image velocity measurements were applied on thermally driven convection at low Rayleigh numbers. In a model experiment using a water column heated from bottom and cooled from above, theExpand
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