Time-resolved high-density particle tracking velocimetry of turbulent Rayleigh-Bénard convection in a cubic sample

A newly developed high-density particle tracking velocimetry (HD-PTV) technique is introduced and validated on a synthetic data set. Further, Lagrangian velocities in turbulent Rayleigh-Bénard Convection (RBC) are determined based on particle images measured in a cubic sample filled with water with...

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Veröffentlicht in:	TI Conference (5. : 2018 : Trois-Ilets) Turbulence and interactions
1. Verfasser:	Schiepel, Daniel (VerfasserIn)
Weitere Verfasser:	Herzog, Sebastian (VerfasserIn), Wagner, Claus (VerfasserIn)
Format:	UnknownFormat
Sprache:	eng
Veröffentlicht:	2021
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Zusammenfassung:	A newly developed high-density particle tracking velocimetry (HD-PTV) technique is introduced and validated on a synthetic data set. Further, Lagrangian velocities in turbulent Rayleigh-Bénard Convection (RBC) are determined based on particle images measured in a cubic sample filled with water with a Prandtl number Pr=6.9 and a Rayleigh number of Ra=1.0⋅10^10. It is shown that the new technique allows to resolve not only a three-dimensional (3D) large-scale circulation in a diagonal plane of the sample but also the secondary flow structures developing in the corners of the perpendicular plane.
ISBN:	9783030658199