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| Tassin, Alan; Breton, Thibaut; Jacques, Nicolas. |
| We investigate the water entry and water exit phenomena experimentally and theoretically. We propose an experimental technique based on the use of transparent mockups and tangential LED lighting systems. This technique makes it possible to follow the contact surface during both the entry and exit phases. We show its feasbiliy for flat plates (square, circular disc, ellipse) and three-dimensional bodies (cone, sphere). The hydrodynamic force evolutions measured during the experiments are compared to numerical simulations (CFD) and to analytical results based on the modified Logvonovich model (MLM). |
| Tipo: Text |
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| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00482/59417/62214.pdf |
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| Tassin, Alan; Breton, Thibaut; Forest, Bertrand; Ohana, Jeremy; Chalony, Sebastien; Le Roux, Dominique; Tancray, Aurelien. |
| 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... |
| Tipo: Text |
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| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00392/50315/51074.pdf |
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