Numerical simulation of binary collisions using a modified surface tension model with particle method

Sun, Zhongguo; Xi, Guang; Chen, Xi

doi:10.1016/j.nucengdes.2008.12.017

Cited by 11 publications

(16 citation statements)

References 40 publications

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“…First, droplet motion in a gas phase was compared with the theoretical oscillation period of a fluid with no viscosity. 20) Next, for wettability with the solid phase, the contact angle was compared with the result of an experiment in which a droplet was dropped on a horizontal solid surface. 21,22) Finally, for dynamic droplet behavior, the contact angle was compared with the result of an experiment in which a droplet was dropped on a solid surface inclined at an angle of 60°.…”

Section: Resultsmentioning

confidence: 99%

Wettability Model Considering Three-Phase Interfacial Energetics in Particle Method

et al. 2012

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Wettability of a solid by a liquid plays a key role in achieving the purpose of the process in moving bed-type reactors. In recent years, particle method has been proposed for the design of processes which include multiphase flows. Using this method, it is possible to analyze a free surface flow without explicitly tracking the interface. Although surface tension and wettability models using the particle method have already been proposed, the complexity of calculations of normal line and curvature of the surface particle has been pointed out as a problem. In this study, surface tension and wettability model were introduced in terms of interparticle potential, and theoretical and experimental verifications were performed for a 3-dimensional particle method which stabilizes the internal pressure distribution in fluids. The analytical solution for the droplet oscillation period by this method showed good agreement with the theoretical solution, and the surface tension between a gas and liquid could be calculated correctly. Because the difference in the number density of a liquid phase and solid phase becomes remarkable in a 3-dimensional space, a technique which corrects for this in particles at a three-phase interface was introduced. Time change in the droplet shape was compared with the experimental results by changing the droplet impact velocity to obtain agreement of the Weber number. It is considered possible to express the droplet shape correctly during rotating falling on a solid surface.

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Section: Resultsmentioning

confidence: 99%

Wettability Model Considering Three-Phase Interfacial Energetics in Particle Method

et al. 2012

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“…To calculate surface tension forces, we followed the framework of Nomura et al [12] and Sun et al [13], selecting a different way to calculate the direction of a surface tension force. The surface tension force, the fourth term of the right hand side of Eq.…”

Section: Surface Tension Modelmentioning

confidence: 99%

“…(15), the surrounding particles with number densities greater than or equal to than that of 1 st i n [13] (as opposed to only larger densities in Nomura et al's work [12]) are shown weighted as the particle i's neighbors. Then the resulting 2 st i n results in a smoother curvature than Nomura's especially on the corner of a droplet.…”

Section: Surface Tension Modelmentioning

confidence: 99%

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Calculation of water droplet impingement using the coupled method of rigid body dynamics and the moving particle semi-implicit method

Park

Jeun

2011

J Mech Sci Technol

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When a liquid droplet impacts on a solid surface, it recoils to the center of that surface after reaching its maximum spreading diameter. The mechanism of droplet recoiling is not fully understood. To simulate this recoiling of a droplet, a particle method is a good choice because it does not require grids for simulating fluid motions, and can easily handle a large deformation of fluid. In this study, the coupled method of rigid body dynamics and the moving particle semi-implicit (MPS) method (Park and Jeun, 2011) was used to calculate three-dimensional droplet impingement. Also, the previous surface tension model for MPS (Nomura et al., 2001) was revised to get a more realistic surface tension force. A two-step calculation was performed. In the first step, a MPS calculation was performed with particles that were considered to have no mass or volume. In the second step, rigid body dynamics came into the calculation and considered the diameters of particles being slightly lesser than the initial distance between particles. In this study, the calculated results were compared with the measured data (Kim and Chun, 2000) and the recoiling lengths of droplets for the various initial impingement speeds were estimated.

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“…However, due to the quite large number of parameters involved in the process, it appears more and more difficult to control the important parameters accurately in experiment, especially the Weber number is high. As the CFD technologies development, numerical simulation studies on two-phase flow thus remain a research topic of high interest and many different methods have been developed to investigate the atomization and droplet transport, such as the particle-incell (PIC) method [7], the smoothed particle hydrodynamics (SPH), the volume of fluid (VOF) [8], the level set method [9], the moving particle semi-implicit (MPS) method [10], and the Lattice Boltzmann method. There numerical studies have been carried out using either "front tracking" methods or "front capturing" methods.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Weber Numbers on Central Collision Between Two Droplets

Feng¹,

Wansheng²,

Zheng³

et al. 2015

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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Numerical simulation of binary collisions using a modified surface tension model with particle method

Cited by 11 publications

References 40 publications

Wettability Model Considering Three-Phase Interfacial Energetics in Particle Method

Wettability Model Considering Three-Phase Interfacial Energetics in Particle Method

Calculation of water droplet impingement using the coupled method of rigid body dynamics and the moving particle semi-implicit method

The Effects of Weber Numbers on Central Collision Between Two Droplets

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