A lattice Boltzmann study on dripping process during 2D droplet impact onto a wetted rotating cylinder

Sayyari, Mohammad Javad; Kharmiani, Soroush Fallah

doi:10.1016/j.molliq.2018.11.087

Cited by 15 publications

(2 citation statements)

References 34 publications

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“…Shan & Chen (1993) developed an LB scheme using interparticle potentials to model multiphase and multicomponent fluid flows. Although this pseudo-potential model can simulate many phase separation phenomena (Li et al 2016;Sayyari, Kharmiani & Esfahani 2019), it suffers from some drawbacks. As He & Doolen (2002) showed in their work, the definition of interparticle potential in this model could lead to thermodynamic inconsistencies.…”

Section: Introductionmentioning

confidence: 99%

A new lattice Boltzmann model for liquid–solid phase transition and its application in the simulation of sessile droplet solidification – focusing on volume change

Mohammadipour,

Duan

2024

J. Fluid Mech.

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This paper introduces a new modification to the convective Cahn–Hilliard equation and a lattice Boltzmann framework to simulate liquid–solid phase transitions in multicomponent systems. The model takes into account changes in properties, such as density, caused by solidification, which leads to volume expansion or contraction. After validating the proposed model against classical problems and experimental data, the solidification of a sessile droplet was investigated in detail. Results of numerical simulations suggest that the environmental conditions are as important as the surface condition in deciding the freezing time and the final shape of the droplet. The environmental properties can also affect the freezing time indirectly through interaction with surface wettability. It has been demonstrated that hydrophobic surfaces may lose their advantages over hydrophilic surfaces in terms of anti-icing performance when primary solidification is initiated from the interface between the droplet and the environment fluid. The deformations of droplets, either with contraction or expansion, were confirmed and compared in different environments. This study offers a new perspective on droplet solidification by exposing the strong influence of environmental conditions and meanwhile provides a useful numerical method to predict the phase change process.

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Section: Introductionmentioning

confidence: 99%

A new lattice Boltzmann model for liquid–solid phase transition and its application in the simulation of sessile droplet solidification – focusing on volume change

Mohammadipour,

Duan

2024

J. Fluid Mech.

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“…Wang et al [8,18] investigated the dynamic behavior of droplet impacts on transmission lines modeled by cylindrical objects with varying wettability and size, employing numerical simulations. Sayyari et al [9,19] presented a study on pinch-off location and time dynamics during 2D droplet impact on a wetted stationary cylinder using the lattice Boltzmann method, employing a novel off-lattice boundary condition for curved boundaries.…”

Section: -Introductionmentioning

confidence: 99%

Investigation of Dynamics of a Droplet Impacting a Pair of Circular Cylinders

Ezzatneshan,

Fattahi

2024

Preprint

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This study explores the intricate dynamics of droplet impact on adjacent cylindrical surfaces. Utilizing the multiphase lattice Boltzmann method and the Allen-Cahn equation, the research delves into how various factors such as droplet size, velocity, surface wettability, and cylinder proximity influence the impact dynamics. It is found that increasing the distance between the cylinders enhances the penetration of the liquid phase and the maximum extent of the liquid ligament. Specifically, at certain distances, the droplet tends to reach equilibrium predominantly on one side of the cylinders, resulting in a shorter ligament length. The study also examines the impact of Reynolds and Weber numbers on droplet dynamics. A reduction in the Reynolds number diminishes the impact inertia, leading to a decrease in the initial length of the liquid ligament and the wetted surface area. Over time, however, the final length of the liquid between the cylinders and the wetted surface is higher for lower Reynolds number impacts due to less liquid separation from the cylinder surfaces. An increase in the Weber number, conversely, reduces surface tension effects relative to inertial force, causing more extensive spreading of the droplet on the cylinder surfaces and altering the movement of separated droplets post-impact. Furthermore, the study highlights the influence of surface wettability. As the contact angle increases, hydrophobic effects repel the liquid phase, resulting in more elongated droplets post-impact. At lower contact angles, the predominance of surface adhesion facilitates quicker equilibrium attainment, while higher contact angles lead to prolonged equilibrium due to oscillatory droplet behavior. These findings offer novel insights into the interactions between droplets and adjacent curved surfaces, with significant implications for optimizing industrial processes and developing new technologies in fields such as inkjet printing and spray coating.

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Multiscale modeling of gas-fluidized beds

Tang

Kuipers

2023

Modeling Approaches and Computational Methods for Particle-Laden Turbulent Flows

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A lattice Boltzmann study on dripping process during 2D droplet impact onto a wetted rotating cylinder

Cited by 15 publications

References 34 publications

A new lattice Boltzmann model for liquid–solid phase transition and its application in the simulation of sessile droplet solidification – focusing on volume change

A new lattice Boltzmann model for liquid–solid phase transition and its application in the simulation of sessile droplet solidification – focusing on volume change

Investigation of Dynamics of a Droplet Impacting a Pair of Circular Cylinders

Multiscale modeling of gas-fluidized beds

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