Ultrafast x-ray phase-contrast imaging of the initial coalescence phase of two water droplets.
Journal Article
·
· Phys. Rev. Lett.
We report an ultrafast x-ray phase-contrast imaging study of the early merging dynamics of two water drops in air. Owing to the edge-enhancement capability, the high penetrability, and the unprecedented temporal and spatial resolutions offered by this new x-ray technique, the coalescence singularity of two water drops was revisited. A finite initial contact radius was identified and the evolvement of the trapped toroidal air bubble was studied for the first time. Despite the existence of this finite initial contact radius, the subsequent meniscus radius followed power laws which agree with theoretical predictions for the inviscid regime.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 927759
- Report Number(s):
- ANL/XSD/JA-61000; PRLTAO; TRN: US200816%%1203
- Journal Information:
- Phys. Rev. Lett., Vol. 100, Issue Mar. 14, 2008; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- ENGLISH
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