Unraveling wetting transition through surface textures with X-rays: liquid meniscus penetration phenomena.
- Antonini C 1] Laboratory of Thermodynamics in Emerging Technologies, Mechanical and Process Engineering Department, ETH Zurich, 8092 Zürich, Switzerland [2].
- Lee JB 1] Chair of Building Physics, ETH Zurich, Wolfgang-Pauli-strasse 15, CH-8093 Zürich, Switzerland [2].
- Maitra T 1] Laboratory of Thermodynamics in Emerging Technologies, Mechanical and Process Engineering Department, ETH Zurich, 8092 Zürich, Switzerland [2].
- Irvine S Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland.
- Derome D Laboratory for Building Science and Technology, Swiss Federal Laboratories for Materials Science and Technology, EMPA, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
- Tiwari MK Laboratory of Thermodynamics in Emerging Technologies, Mechanical and Process Engineering Department, ETH Zurich, 8092 Zürich, Switzerland.
- Carmeliet J 1] Chair of Building Physics, ETH Zurich, Wolfgang-Pauli-strasse 15, CH-8093 Zürich, Switzerland [2] Laboratory for Building Science and Technology, Swiss Federal Laboratories for Materials Science and Technology, EMPA, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland.
- Poulikakos D Laboratory of Thermodynamics in Emerging Technologies, Mechanical and Process Engineering Department, ETH Zurich, 8092 Zürich, Switzerland.
- 2014-02-12
Published in:
- Scientific reports. - 2014
English
In this report we show that synchrotron X-ray radiography is a powerful method to study liquid-air interface penetration through opaque microtextured surface roughness, leading to wetting transition. We investigate this wetting phenomenon in the context of sessile drop evaporation, and establish that liquid interface sinking into the surface texture is indeed dictated by the balance of capillary and Laplace pressures, where the intrinsically three-dimensional nature of the meniscus must be accounted for. Air bubble entrapment in the texture underneath impacting water drops is also visualized and the mechanisms of post-impact drop evaporation are discussed.
- Language
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- English
- Open access status
- gold
- Identifiers
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- DOI 10.1038/srep04055
- PMID 24514762
- Persistent URL
- https://sonar.ch/global/documents/168065
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