Author(s): Sergio Martinez-Aranda; Ignacio Garcia-Palacin; Pilar Garcia-Navarro
Linked Author(s): Pilar García-Navarro
Keywords: No Keywords
Abstract: Hydro-morphodynamical gravity-driven flows involve the mobilization of large fluidized masses composed of water, sediments and multiple solid materials. These non-Newtonian flows are highly transient and unpredictable processes with a huge destructive potential for facilities and humans. The understanding of these complex flows requires both to improve predictive models and to collect more reliable laboratory and field data. This work shows a novel non-intrusive technique to measure both the free surface evolution and the surface velocity field in highly transient viscoplastic flows. The proposed technique deploys near-infrared (NIR) detection to reconstruct the 3D free surface within each time-window and to correct synchronized time-resolved PIV measurements of the free surface velocity field. This technique was tested for the impact of a viscoplastic dambreak shock-wave on a rigid flat obstacle. The results provide an excellent characterization of the complex flow field and help to get insight into the mechanical response of the obstacle.
Year: 2024