Publication: Modeling of the bubbling process in a planar co-flow configuration
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2016-06-01
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Elsevier
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Abstract
This work presents an analytical model developed to describe the bubbling regime resulting from the injection of an air sheet of thickness 2H(o) with a mean velocity u(a) between two water streams of thickness H-w - H-o, moving at a uniform velocity u(w). Based on previous experimental and numerical characterizations of this flow, the gas stream is modeled as a two-dimensional sheet divided into three different parts in the streamwise direction: a neck that moves downstream at the water velocity, a gas ligament attached to the injector upstream of the neck, and a forming bubble downstream of the neck, whose uniform dimensionless half-thicknesses are eta(n)(tau), eta(l)(tau), eta(b)(tau) respectively, and the corresponding pressures are given by Pi(n)(tau), Pi(l)(tau), and Pi(b)(tau) Pi(n)(tau). Lengths are made dimensionless with H-o, and pressures with rho(a)u(a)(2) where rho(a) is the air density.
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Bubble formation, Co-flow configuration, Theorerical modeling, Air-water sheets, Microbubbles, Generation, Absolute, Growth, Nozzle, Jets
Bibliographic citation
Bolaños-Jiménez, R., Sevilla, A. & Martínez-Bazán, C. (2016, junio). Modeling of the bubbling process in a planar co-flow configuration. International Journal of Multiphase Flow, 82, 86-92.