EXP 1-4 Measurement Quantities and Techniques
Axisymmetric drop impact dynamics on a wall film of the same liquid
Measurement quantities and techniques
Describe the measurement techniques and indicate which quantities were measured and where. Describe how well conditions at boundaries of the flow such as inflow, outflow, walls, far fields, free surface are given or could be reasonably estimated to provide boundary conditions for CFD calculations.
Images are taken with a high-speed CMOS camera (Photron SA-X2),
recording the impact at a frame rate of 20000 fps with a magnification of
31 μm/px. A synchronized high-performance LED (Constellation 120E)
in combination with a diffuser plate provides a uniform background
illumination. When carrying out the experiments, a uniform film of 500
μm thickness is prepared utilizing the film thickness sensor. In the next
step, the film thickness sensor is moved and a drop is generated. Shadowgraph
images are taken during the drop impact onto the liquid film.
Contributed by: Bastian Stumpf, Milad Bagheri, Ilia V. Roisman, Cameron Tropea, Jeanette Hussong, Martin Wörner, Holger Marschall — Technical University of Darmstadt and Karlsruhe Institute of Technology
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