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Collision and coalescence of dispersed drops in turbulent liquid flow

TLDR
In this article, the collision and coalescence of drops are studied in turbulent liquid flow, and the random motion of drops is found quite analogous to that of molecules assumed in simple gas kinetic theory.
Abstract
The collision and coalescence of drops are studied in turbulent liquid flow. From the standpoint of collision frequency, the random motion of drops is found quite analogous to that of molecules assumed in simple gas kinetic theory. The process of coalescence of drops is followed, and it is found that two drops will coalesce immediately on collision in the case when they will finally coalesce. The coalescence fraction may be determined by the kinetic energy at the instant of collision, but the fraction is surprisingly small and cannot accede to the order of 10-1 in the range observed.

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A literature review on mechanisms and models for the coalescence process of fluid particles

TL;DR: In this article, a literature review on the mechanisms and models of coalescence of fluid particles is presented, and five categories are summarized, namely, turbulence fluctuation, viscous shear stress, capture in turbulent eddies, buoyancy and wake interaction.
Journal ArticleDOI

Statistical mechanical description and modelling of turbulent collision of inertial particles

TL;DR: In this paper, the collision rate of monodisperse solid particles in a turbulent gas is governed by a wide range of scales of motion in the flow and the accumulation effect is most noticeable when the particle inertial response time τp is of the order of the flow integral timescale.
Journal ArticleDOI

Modeling of Bubble Column Reactors: Progress and Limitations

TL;DR: In this article, the progress reported in the literature during the past decade regarding the use of averaged Eulerian multifluid models and computational fluid dynamics (CFD) to model vertical bubble-driven flows is reviewed.
Journal ArticleDOI

The Liquid/Liquid Sedimentation Process: From Droplet Coalescence to Technologically Enhanced Water/Oil Emulsion Gravity Separators: A Review

TL;DR: In this article, a short description of the coalescence mechanism (droplet collision, film drainage, film rupture) and three micromechanical sedimentation models (Hartland, Lobo, Henschke) and one set of design rules (Polderman) are described.
Journal ArticleDOI

On the collision rate of small particles in isotropic turbulence. II. Finite inertia case

TL;DR: In this article, it was shown that the Saffman and Turner result for the average collision kernel is correct only under the assumption that the particles are kept in the system after collision and allowed to overlap in space.
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