Bulletin of the American Physical Society
76th Annual Meeting of the Division of Fluid Dynamics
Sunday–Tuesday, November 19–21, 2023; Washington, DC
Session J23: Convection and Buoyancy-Driven Flows: General II
4:35 PM–6:32 PM,
Sunday, November 19, 2023
Room: 149AB
Chair: Chunendra Sahu, IIT Kanpur
Abstract: J23.00001 : Analog rain experiment: plumes of soluble particles*
4:35 PM–4:48 PM
Presenter:
Yutong CUI
(ESPCI Paris)
Authors:
Yutong CUI
(ESPCI Paris)
Philippe Claudin
(CNRS)
BENOIT SEMIN
(CNRS)
Collaboration:
PMMH
During the experiments, a controlled amount of salt is injected into the water tank to mimic rain, resulting in the formation of a plume due to particle sedimentation. When the tank is filled with non-saturated water, the injected particles dissolve progressively during their descent, significantly influencing the characteristics of the plume.
To quantify these phenomena, we employ light absorption to measure particle concentration and Particle Image Velocimetry (PIV) to analyze velocity fields, enabling us to estimate the entrainment velocity as a function of particle injection rate.
Our findings reveal that the solubility of particles plays a pivotal role in shaping the plume. Furthermore, the entrainment velocity of soluble particles exhibits considerable variation depending on the specific particle properties. These observations hold implications for enhancing our understanding of environmental and climate-related processes impacted by sedimentation and evaporation phenomena.
*China Scholarship Council;Centre national de la recherche scientifique;École supérieure de physique et de chimie industrielles de la Ville de Paris PSL
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