High-magnification shadowgraphy for the study of drop breakup in a high-speed gas flow
Abstract
Direct observation of the droplet breakup process in high-speed gas flows is a critical challenge that needs to be addressed to elucidate the physical mechanisms underlying the fragmentation phenomenon. Here, we present a high-magnification and high-speed shadowdograph technique that allows the visualization of this process over its whole evolution and resolves detailed features of the breakup zone. The developed experimental method uses a high-speed camera equipped with a long-distance microscope. The backlight illumination source is provided by the laser-induced fluorescence of a dye solution that delivers short pulses at a high-repetition rate. Artefacts resulting from the laser coherence are therefore reduced.
- Publication:
-
Optics Letters
- Pub Date:
- December 2019
- DOI:
- 10.1364/OL.44.005884
- arXiv:
- arXiv:2011.07344
- Bibcode:
- 2019OptL...44.5884B
- Keywords:
-
- Physics - Fluid Dynamics
- E-Print:
- Optics Letters Vol. 44, Issue 23, pp. 5884-5887 (2019)