Gas diffusion among bubbles and the DCS risk

We present some experimental and simulation results that reproduces the Ostwald ripening (gas diffusion among bubbles) for air bubbles in a liquid fluid. Concerning the experiment, there it is measured the time evolution of bubbles mean radius, number of bubbles and radius size distribution. One of...

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Bibliographic Details
Published in:arXiv.org 2017-11
Main Authors: Del Cima, Oswaldo M, Oliveira, Paulo C, Rocha, Cesar M, Silva, Hallan S, Alvaro V N C Teixeira
Format: Article
Language:English
Subjects:
Air bubbles
Bubbles
Computer simulation
Decompression sickness
Diving
Gaseous diffusion
Ostwald ripening
Size distribution
Software
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Summary:We present some experimental and simulation results that reproduces the Ostwald ripening (gas diffusion among bubbles) for air bubbles in a liquid fluid. Concerning the experiment, there it is measured the time evolution of bubbles mean radius, number of bubbles and radius size distribution. One of the main results shows that, while the number of bubbles decreases in time the bubbles mean radius increases, hence, it follows that the smaller bubbles disappear whereas the -- potentially dangerous for the diver -- larger bubbles grow up. Consequently, this effect suggests a possible contribution of the Ostwald ripening to the decompression sickness, and if so, it should be pursued its implementation to the Reduced Gradient Bubble Model (RGBM) so as to build up dive tables and computer programs for further diving tests.
ISSN:2331-8422