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Visualization of the contact line during the water exit of flat plates
- Source :
- Experiments In Fluids (0723-4864) (Springer), 2017-08, Vol. 58, N. 8, P. 104 (1-9)
- Publication Year :
- 2017
- Publisher :
- Springer, 2017.
-
Abstract
- We investigate experimentally the time evolution of the wetted surface during the lifting of a body initially floating at the water surface. This phenomenon is referred to as the water exit problem. The water exit experiments were conducted with transparent (PMMA) mock-ups of two different shapes: a circular disc and a square flat plate. Two different lighting systems were used to diffuse light in the mock-up material: a central high-power LED light normal to the surface and an edge-lighting system featuring an array of LED lights. These setups make it possible to illuminate the contact line, which delimits the surface of contact between the mock-up and the water. The characteristic size of the mock-ups is about 20 cm and the acceleration of the mock-up oscillates between 0 and 25 m/ $$\mathrm{s}^2$$ . We show that the central light setup gives satisfactory results for the circular disc and that the edge lighting technique makes it possible to follow a contact line with a time-evolving complex shape (strong changes of convexity) up to 1000 fps. The observations presented in the paper support the possibility of extending this promising technique to more general three-dimensional bodies with arbitrary motion (e.g., including pitch motion).
- Subjects :
- Fluid Flow and Transfer Processes
Surface (mathematics)
Physics
business.industry
Computational Mechanics
Time evolution
General Physics and Astronomy
Edge (geometry)
01 natural sciences
Convexity
Square (algebra)
010305 fluids & plasmas
Acceleration
Optics
Mechanics of Materials
0103 physical sciences
Diffuse reflection
Wetting
010306 general physics
business
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Experiments In Fluids (0723-4864) (Springer), 2017-08, Vol. 58, N. 8, P. 104 (1-9)
- Accession number :
- edsair.doi.dedup.....98d8116c8e7f0c9eb0707b2bb001dfe5