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, wood 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 numerical models and to collect more reliable laboratory and field data. This proof-of-concept work shows a novel non-intrusive technique to measure both the free surface position and 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 the synchronized time-resolved PIV measurement 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