Coalescence of colliding van der Waals liquid drops

Meleán, Y.; Sigalotti, Leonardo Di G.

doi:10.1016/j.ijheatmasstransfer.2005.04.006

Cited by 64 publications

(35 citation statements)

References 34 publications

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“…However, for higher Reynolds number and higher Weber number, the model has to be improved. Viscous droplet has also been studied using SPH method by many other researchers such as Jiang et al [18] and Meleán et al [19,20].…”

Section: Introductionmentioning

confidence: 99%

Smoothed particle hydrodynamics modeling of viscous liquid drop without tensile instability

2014

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a b s t r a c tSmoothed particle hydrodynamics (SPH), as a Lagrangian meshfree particle method, has been applied to modeling viscous liquid drop with surface tension and wetting dynamics. In the SPH model, the van der Waals (vdW) equation of state is usually used to describe the gas-to-liquid phase transition similar to that of a real fluid. However, the attractive forces between SPH particles originated from the cohesive pressure of the vdW equation of state can lead to tensile instability, which is associated with unphysical phenomena such as particle clustering or blowing away. This paper presents an improved SPH method for modeling viscous liquid drop. The inherent tensile instability in SPH is removed by using a hyperbolicshaped kernel function which possesses non-negative second derivatives. A single-step approximation for heat flux is used in modeling viscous liquid drop with smoother temperature field. The formations of viscous liquid drops, both in 2D and 3D, are tested and it clearly demonstrates that the tensile instability can be effectively removed. The improved SPH method is also used to model two other numerical examples including the oscillation and binary collision of liquid drops without tensile instability.

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Section: Introductionmentioning

confidence: 99%

Smoothed particle hydrodynamics modeling of viscous liquid drop without tensile instability

2014

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“…3 The occurrence of each mechanism largely depended on factors such as the ratio of droplet radii, the impact parameter, the relative velocity of collision, the surface tension and the density of the droplet. In this case theoretical calculations can be used to provide useful predictions for the droplet motion, and therefore the collision of the liquid droplets was studied by the smoothed particle hydrodynamics 4 and lattice Boltzmann method.…”

Section: Introductionmentioning

confidence: 99%

Molecular Dynamics Study on the Binary Collision of Nanometer-Sized Droplets of Liquid Argon

Chun¹,

Ha²,

Jang³

et al. 2011

Bulletin of the Korean Chemical Society

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Molecular dynamics simulation is used to study the binary collisions of nanometer-sized droplets of argon in the presence of a surrounding gas. By systematically varying the droplet size, the impact parameter and the velocity of collision, the outcome of such collisions were examined and they can be classified into coalescence, separation and shattering. If one of the colliding droplets is half or less than the other in diameter, a shattering is not possible to occur. The threshold of impact parameter for a given separation was studied by adjusting the Weber number. Overall nanoscale droplets were more likely to coalesce than the macroscopic sized ones due to their high surface-to-volume ratio.

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“…Prior to the work of [17], Nugent and Posch [22] and Meleán et al [23,24] To reduce the number of parameters, it is common to set s αα = s ββ . The main advantage of the PF-SPH model is that there is no need to prescribe the dynamic contact angle.…”

Section: Sph Pair-wise Force Model For Multiphase Flowsmentioning

confidence: 99%

Smoothed particle hydrodynamics and its applications for multiphase flow and reactive transport in porous media

et al. 2015

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Smoothed particle hydrodynamics (SPH) is aLagrangian method based on a meshless discretization of partial differential equations. In this review, we present SPH discretization of the Navier-Stokes and advection-diffusionreaction equations, implementation of various boundary conditions, and time integration of the SPH equations, and we discuss applications of the SPH method for modeling pore-scale multiphase flows and reactive transport in porous and fractured media.

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Coalescence of colliding van der Waals liquid drops

Cited by 64 publications

References 34 publications

Smoothed particle hydrodynamics modeling of viscous liquid drop without tensile instability

Smoothed particle hydrodynamics modeling of viscous liquid drop without tensile instability

Molecular Dynamics Study on the Binary Collision of Nanometer-Sized Droplets of Liquid Argon

Smoothed particle hydrodynamics and its applications for multiphase flow and reactive transport in porous media

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