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Session: Atmospheric turbulence 1
Session starts: Tuesday 25 August, 10:30
Presentation starts: 11:00
Room: Room C

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Mehmet Altug Yavuz (Eindhoven University of Technology)
Rudie Kunnen (Eindhoven University of Technology)
GertJan van Heijst (Eindhoven University of Technology)
Herman Clercx (Eindhoven University of Technology)

Abstract:
We are investigating a droplet-laden flow in an air-filled turbulence chamber, forced by speaker-driven air jets. The speakers are running in a random manner; yet they allow us to control and define the statistics of the turbulence. We study the motion of droplets with tunable size in a turbulent flow, mimicking the early stages of raindrop formation. 3D Particle Tracking Velocimetry (PTV) is chosen as the experimental method to track the droplets and collect data for statistical analysis. Thereby it is possible to study the spatial distribution of the droplets in turbulence using the so-called Radial Distribution Function (RDF), a statistical measure to quantify the clustering of particles. Additionally, this technique allows us to measure velocity statistics of the droplets and the influence of the turbulence on droplet trajectories, both individually and collectively. In this contribution, we will present velocity statistics of the droplets and quantify their clustering using the RDF for different turbulence conditions.