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Session: Experimental and numerical data assimilation II
Session starts: Thursday 06 November, 14:20
Presentation starts: 15:00
Room: Lecture room B

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Mohamed Rozki (Université de Pau et des Pays de l’Adour (UPPA), E2S UPPA, SIAME, Anglet, France)
Stéphane Abadie ()
Amir Parvin ()
Benoit Larroque ()
Denis Morichon ()
Olivier Nouailletas ()
Yves Le guer ()

Abstract:
This paper studies the generation of impulse waves by collapsing water volumes, initially close to the free surface. Abadie et al. (2025) recently showed that this configuration optimizes the energy transfers from the slide to the waves. Here, we present a set of experiments to validate the numerical model used in the previous study. These measurements were conducted in a 2D flume equipped with a pneumatically driven gate to control the water releases on a 45◦ slope. The wave field was measured locally with wave gauges and spatially, with five cameras covering the whole flume areas, both at 100 Hz. Dye was used to color the water in the flume lighted by LED panels located behind it. The slide water volume was not colored in order to locate the interface between the two water volumes during generation. The camera images were also used to track the onset and ending of wave breaking through the visual appearance of white foam and to measure the gate position in time. For the simulations, we used a two-phase flow (water/air) RANS–VOF model (interFoam) complemented with a dynamic mesh to reproduce the gate motion as described in Parvin et al. (2024). Lagrangian tracking was performed to locate the position of the interface between the water slide and the water volume in the numerical flume, and the breaking onset was followed through the production of turbulent kinetic energy. For the conference, experimental results and comparison with the numerical results will be presented (Figure 1).