Numerical simulation of the deformation and breakup of a two-core compound droplet in an axisymmetric T-junction channel

Ho, Nang X.; Vu, Truong V.

doi:10.1016/j.ijheatfluidflow.2020.108702

Cited by 12 publications

(1 citation statement)

References 32 publications

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“…Thus, its knowledge has become mature. 4 Concerning compound droplets, many studies have been done, such as numerical simulation of dynamical behaviors of compound droplets, 5,6 the collision of compound droplets, 7,8 and the deformation and breakup of compound droplets in shear flow. 9 The initial conditions of the problem are significantly important, depending on the surface tension of the interface separating different fluids, the properties of the fluids such as viscosity and density.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of a contracting fluid compound filament with a variable density ratio

Nguyen

et al. 2021

Sci. Tech. Dev. J.

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Introduction: Compound fluid filaments appear in many applications, e.g., drug delivery and processing or microfluidic systems. This paper focuses on the numerical simulation of an incompressible, immiscible, and Newtonian fluid for the contraction process of a fluid compound filament by solving the Navier-Stokes equations. The front-tracking method is used to solve this problem, which uses connected segments (Lagrangian grid) that move on a fixed grid (Eulerian grid) to represent the interface between the liquids. Methods: The interface points are advected by the velocity interpolated from those of the fixed grid using the area weighting function. The coordinates of the interface points are used to construct the indicators specifying the different fluids and compute the interfacial tension force. Results: The simulation results show that under the effects of the interfacial tension, the capsuleshaped filament can transform into a spherical compound droplet (i.e., non-breakup) or can break up into smaller spherical compound and simple droplets (i.e., breakup). When the density ratio of the outer to middle fluids increases, the filament changes from non-breakup to breakup upon contraction. Conclusion: Increasing the density ratio enhances the breakup of the compound filament during contraction. The breakup is also promoted by increasing the initial length of the filament.

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