Simulation of interaction between a freely moving solid particle and a freely moving liquid droplet by lattice Boltzmann method

Yang, Bo; Chen, Sheng

doi:10.1016/j.ijheatmasstransfer.2018.06.112

Cited by 27 publications

(10 citation statements)

References 43 publications

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“…4(a) at a non-dimensional time, 3.75. It can be observed that the droplet interaction with the solid particle captured in the present model is similar to the behavior of the droplet that Yang and Chen 38 predicted. In addition, the time-dependent velocity of moving solid particles is also compared for two wetting parameters, hydrophobicity and hydrophilicity, and is shown in Fig.…”

Section: Numerical Modelingsupporting

confidence: 81%

“…It can also be noticed that the behavior of solid particle movement is captured well by the present model for both the wetting parameters with the data that are taken from the study of Yang and Chen. 38 These well-predicted qualitative and quantitative data show the ability of the present model for analyzing the behavior of respiratory droplets in an open environment with pollutants.…”

Section: Numerical Modelingsupporting

confidence: 55%

“…In order to confirm the correctness of a numerical model, a comparative evaluation between the present numerical model with the published available model needs to be performed. As there are no data available for the movement of respiratory droplets in an open environment with moving solid particles (pollutants) of different wetting characteristics, a similar study of the interaction between a freely moving solid particle and a freely moving liquid droplet analyzed by Yang and Chen 38 is considered for verifying the accurateness of the present numerical model. They investigated the interactions between a freely moving solid particle with different wettability and a freely moving liquid droplet in a different fluid domain, as shown in Fig.…”

Section: Numerical Modelingmentioning

confidence: 99%

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Study of the interactions of sneezing droplets with particulate matter in a polluted environment

2021

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We have performed a three-dimensional numerical simulation to determine the effect of local atmospheric pollution level on the spreading characteristics of the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) virus through ejected droplets during sneezing and coughing in an open space. Utilizing a finite volume-based numerical method, we have performed computations for various ranges of droplet diameters and sneezing speeds. The interactions between the droplets and the suspended particles are considered by taking both hydrophobic and hydrophilic wettability characteristics into account. Our computational results show that the virus-containing droplets partially affect aerosols during the path of their transmission. With the progression of time, the droplet distribution shows an asymmetric pattern. The maximum dispersion of these droplets is found for higher sneezing velocities. The droplets with a diameter of 50 μm travel a larger distance than the larger diameter droplets. We have found that an aerosol with hydrophilic wettability undergoes complete wetting by the disease-containing droplets and therefore is conducive to disease propagation. The droplet engagement duration with aerosol decreases with increase in the sneezing velocity. Our study recommends against using physical exercise centers in a closed environment such as gymnasium and indoor games during the COVID pandemic, especially in a polluted environment. The results from our work will help in deciding proper social distancing guidelines based on the local atmospheric pollution level. They may act as a precursor in controlling further spread of diseases during this unprecedented situation of the COVID pandemic.

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Section: Numerical Modelingsupporting

confidence: 81%

Section: Numerical Modelingsupporting

confidence: 55%

Section: Numerical Modelingmentioning

confidence: 99%

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Study of the interactions of sneezing droplets with particulate matter in a polluted environment

2021

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“…However, in reality, droplet and particle can freely move before and after the collision. In a recent study, Yang et al, [22] used 2D numerical simulations to investigate the drop-particle collision when both droplet and particle are freely moving. They noted that when a hydrophobic particle is tested, the droplet and particle would be separated after impact.…”

Section: Introductionmentioning

confidence: 99%

Building pathways to full encapsulation processes

Shamsipour

Manshadi

Khojasteh

et al. 2021

ICLASS

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Encapsulation, i.e. the coating of tiny solid or liquid particles in a liquid film, has received a growing interest among scholars due to its practical applications, especially in food and pharmaceutical industries. Encapsulation technology is used in coating and controlling drug delivery by protecting the active agents from environmental pressures (e.g., heat, oxygen) and unsought colours/odours. In practice, when dealing with solid particles, this process occurs through impacting liquid droplets of the coating material upon the agent particles. While, in reality, droplet and particle can freely move before and after the collision, a vast majority of the previous efforts to characterize drop-particle impact outcomes have considered that one of the two components is stationary. This study numerically investigates the head-on collisions between freely moving droplet of a glycerine-water solution or synthetic fluids, and freely moving dry spherical particles. In order to achieve this results, a novel 2D axisymmetric Level Set simulation includes fluid-structure interaction (FSI) and an arbitrary Lagrangian-Eulerian (ALE) technique The relative impact velocity and drop-to-particle density ratio are varied across the simulation cases to indicate the importance of variations in momentum. These preliminary results indicate that optimising the momentum is a key factor in achieving a full and stable encapsulation, requiring further research.

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“…Most studies were focused on relative velocity between particle and droplet. Recently, Yang et al [9] simulated the interaction between freely moving particle and droplet, and analyzed the results according to size and eccentricity ratio. It was carried out in plane 2D geometry which can be quite different from real physics.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of freely moving particle–droplet interaction with initial contact

Choi

Shin

2019

JMST Adv.

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We simulated freely moving particle-droplet interaction with initial contact. Fluid-structure interaction was modeled by fictitious domain method, and two-fluid interface was tracked using Level Contour Reconstruction Method. For tracking movement of the solid object, additional object distance function was calculated at Eulerian grid center. Since simple geometry, i.e., circle, was used in this study, object distance function can be easily computed from center location updated by averaged velocity to constrain solid movement. The interaction phenomenon was simplified as center-to-center contact without initial velocity. The gravitational acceleration was also ignored. We choose the size ratio and Ohnesorge (Oh) number as main parameters. Two characteristic behaviors were captured: the merging and separation case. Each velocity of the particle and droplet was shown to see the detailed evolution for merging and separation. In addition, two major forces acting on the particle, a capillary force and inertial force, were analyzed.

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Simulation of interaction between a freely moving solid particle and a freely moving liquid droplet by lattice Boltzmann method

Cited by 27 publications

References 43 publications

Study of the interactions of sneezing droplets with particulate matter in a polluted environment

Study of the interactions of sneezing droplets with particulate matter in a polluted environment

Building pathways to full encapsulation processes

Numerical investigation of freely moving particle–droplet interaction with initial contact

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