Abstract
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 volume was developed and applied in a Rayleigh-Bénard (RB) cell. The 3D PTV system consists of four CMOS cameras, two flash lamps, an image recording and data processing system. Helium filled soap bubbles and latex balloons have been used as tracer particles. The spatial resolution and accuracy have been investigated in a test cell with the dimensions of 4×3×4m 3 by means of a given trajectory of a small glass sphere. A first application of the developed 3D PTV system in the large RB cell with a diameter of 7.15m and a height of 3.5m showed different characteristic flow patterns of the mean flow outside the boundary layers. The proposed technique has a wide range of potential application for the analysis of indoor air flows.
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Lobutova, E., Resagk, C., Rank, R., Müller, D. (2009). Extended Three Dimensional Particle Tracking Velocimetry for Large Enclosures. In: Nitsche, W., Dobriloff, C. (eds) Imaging Measurement Methods for Flow Analysis. Notes on Numerical Fluid Mechanics and Multidisciplinary Design, vol 106. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-01106-1_12
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DOI: https://doi.org/10.1007/978-3-642-01106-1_12
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