Work

Shadowgraphy measurements of bubble jet coupled with surface oscillations

Year: 2025

Type: article

Abstract: We present an image processing method to track and characterize the motion of air–liquid interfaces occurring in aerated liquid baths. In a rectangular tank filled with water, an immersed sparger injects air vertically at a constant flow rate and creates well-defined sloshing oscillations of the free surface. The phenomenon is referred to as self-induced sloshing. We retrieve the positions of both the surface and the jet position using a tailored image processing method based on shadowgraphy. Using Complex Orthogonal Decomposition (COD), we reveal the main spatial and temporal dynamics of the oscillations.

Source: International Journal of Multiphase Flow

DOI: 10.1016/j.ijmultiphaseflow.2025.105543

Authors: Marc Vacher, Tullio Traverso, Christophe Josserand, Stéphane Perrard, Sophie Ramananarivo

Institutions: Saint-Gobain (France), Laboratoire d'Hydrodynamique de l'École polytechnique, Physique et Mécanique des Milieux Hétérogènes, Saint-Gobain Recherche Paris, ESPCI Paris

Language: English

Topic: Fluid Dynamics and Heat Transfer

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,900

Funders: École Supérieure de Physique et de Chimie Industrielles de la Ville de Paris, Centre National de la Recherche Scientifique