Particle Shadow Velocimetry (PSV) in bubbly flows


Particle Shadow Velocimetry (PSV) in bubbly flows

Heßenkemper, H.; Ziegenhein, T.

The interaction of gas bubbles and the surrounding liquid in bubbly flows is a complex hydrodynamic phenomenon. Precise measurements of the liquid velocity are mandatory to generate accurate models and CFD-validation data sets. For this purpose, methods for Particle Shadow Velocimetry (PSV) that are using a volume illumination and a small depth of field (DOF) are developed in the presented work. Experiments with an oscillating plume were conducted in a rectangular bubble column to test the PSV methods. The results obtained with a Particle Image Velocimetry (PIV) and a Particle Tracking Velocimetry (PTV) processing procedure agree very well with respect to velocity profiles and turbulence parameters. As discussed in previous work, PSV methods have a much simpler experimental setup and can handle much higher gas fractions. With the present findings, robust PSV algorithms for PIV and PTV in bubbly flows are now available.

Keywords: Particle Shadow Velocimetry; Multiphase Flow; Bubbly flow; Particle Image Velocimetry; Particle Tracking Velocimetry

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Permalink: https://www.hzdr.de/publications/Publ-26515
Publ.-Id: 26515