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Physical Modelling of Air Bubble Entrainment in Vertical Planar Plunging Jets

  • This video presents the latest development in air entrainment at vertical plunging jets.
Plunging jet entrainment is a highly efficient mechanism for producing large gas-liquid interfacial areas. Applications include minerals-processing flotation cells, waste-water treatment, oxygenation of mammalian-cell bioreactors, riverine re-oxygenation weirs and the understanding of plunging ocean breakers. While detailed air-water flow measurements were conducted in a two-dimensional plunging jet, most studies of air entrainment processes at circular plunging jets have been qualitative. It is understood that plunging jet entrainment takes place when the jet impact velocity exceeds a critical velocity. For larger jet velocities, the developing region of plunging jet flow is subjected to strong interactions between the entrained air bubbles and the momentum transfer mechanism.

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This web site was launched by Prof. Michele Mossa of the Polytechnic University of Bari (Italy) with the initial support of Fondazione Caripuglia, Bari, Italy for the Research Project LIC-MON of 2003 and of the Project IMCA (Integrated Monitoring of Coastal Areas) financed by MIUR PON D.M. 593/00. Later, the initiative was supported with other Prof. Michele Mossa’s funds, most recently provided by the RITMARE Project.

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