Ternary drop collisions

Hinterbichler, Hannes; Planchette, Carole; Brenn, Günter

doi:10.1007/s00348-015-2056-x

Cited by 23 publications

(14 citation statements)

References 21 publications

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“…First, beside the presence of different encapsulating liquids, and, more importantly, beside the changes adopted by the recoiling drop, this result is similar to the one obtained for drop-drop collisions using a single liquid (Willis & Orme 2003), see also figure 9(b). This seems to indicate that the kinetics of the drop recoil remains dominated by the typical oscillation time t d osc of an isolated drop and that the pinch-off is driven by an excessive extension of the recoiling drop, as for drop-drop collisions with two and three drops, using one or two liquids (Willis & Orme 2003;Planchette et al 2012;Hinterbichler, Planchette & Brenn 2015;. This hypothesis can be further tested by looking at figure 10(c), where ζ is plotted as a function of We d using full symbols for drops in jet outcomes and open ones for fragmented drops in jet or mixed fragmentation.…”

Section: Drop Pinch-off On the Importance Of Recoilmentioning

confidence: 99%

Influence of liquid miscibility and wettability on the structures produced by drop–jet collisions

et al. 2019

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Section: Drop Pinch-off On the Importance Of Recoilmentioning

confidence: 99%

Influence of liquid miscibility and wettability on the structures produced by drop–jet collisions

et al. 2019

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“…We assume the simultaneous collisions between three or more droplets can be neglected because of the low liquid to air volume fraction of the spray. In the work of Hinterbichler et al [41], ternary droplet collisions were investigated experimentally. The morphology of collision events between three droplets and their boundaries between the collision outcomes resulted similar to the ones of binary droplet collisions.…”

Section: The Droplet Time Step Is Updated By Calculating the Mean Frementioning

confidence: 99%

Droplet collisions of water and milk in a spray with Langevin turbulence dispersion

Finotello

Padding

Buist

et al. 2019

International Journal of Multiphase Flow

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In this work we investigate droplet-droplet collision interactions in a spray system using an Eulerian-Lagrangian model with subgrid turbulence dispersion. The effect of different droplet viscosities on the type and frequency of droplet collision is investigated, knowledge of which is essential for industrial processes such as spray drying for production of milk powder. The dispersed phase is treated with Lagrangian transport of droplets and the turbulent self-induced gas flow using large eddy simulation (LES). A stochastic Direct Simulation Monte Carlo (DSMC) method is used to detect collisions between droplets. The outcome of a binary collision is described by a collision boundary models for water and milk concentrates. A turbulence dispersion model, based on the Langevin equation, accounts for the stochastic subgrid fluid velocity fluctuations along the droplet trajectory. We compare the spray dynamics with and without droplet interactions and turbulence dispersion. For a spray with typical droplet size of 50 µm, we find that the turbulence dispersion model enhances the total collision frequencies by approximately 25%. The performance of the turbulent dispersion model is tested by investigating the rate of collisions for different milk concentrates.The evolution of size distributions inside the spray is strongly influenced by the complementary effects of collision boundary models and turbulence dispersion.

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“…In this subsection, we study a dynamic problem involving four fluid phases as another test for validating the developed LB method. This phenomenon is very common in engineering and industrial problems, as well as in nature, such as in spraying processes, in micro-reactors, and in kitchen [55,56,4]. The problem configuration is shown in Fig.…”

Section: Dynamics Of Droplet Collision For Four Fluid Phasesmentioning

confidence: 99%

Phase-field-based lattice Boltzmann model for immiscible incompressible N-phase flows

Yuan,

Liang,

Chai

et al. 2019

Preprint

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In this paper, we develop an efficient lattice Boltzmann (LB) model for simulating immiscible incompressible N -phase flows (N ≥ 2) based on the Cahn-Hilliard phase field theory. In order to facilitate the design of LB model and reduce the calculation of the gradient term, the governing equations of the Nphase system are reformulated, and they satisfy the conservation of mass, momentum and the second law of thermodynamics. In the present model, (N − 1) LB equations are employed to capture the interface, and another LB equation is used to solve the Navier-Stokes (N-S) equations, where a new distribution function for the total force is delicately designed to reduce the calculation of the gradient term. The developed model is first validated by two classical benchmark problems, including the tests of static droplets and the spreading of a liquid lens, the simulation results show that the current LB model is accurate and efficient for simulating incompressible N -phase fluid flows. To further demonstrate the capability of the LB model, two numerical simulations, including dynamics of droplet collision for four fluid phases and dynamics of droplets and interfaces for five fluid phases, are performed to test the developed model. The results show that the present model can successfully handle complex interactions among N (N ≥ 2) immiscible incompressible flows.

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Ternary drop collisions

Cited by 23 publications

References 21 publications

Influence of liquid miscibility and wettability on the structures produced by drop–jet collisions

Influence of liquid miscibility and wettability on the structures produced by drop–jet collisions

Droplet collisions of water and milk in a spray with Langevin turbulence dispersion

Phase-field-based lattice Boltzmann model for immiscible incompressible N-phase flows

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