Surveying the effects of concave obstacles with different edge walls on hollow glycerin droplet impacting using the volume of fluid approach

Sayyari, Hossein; Peiravi, Mohammad Mohsen; Alinejad, Javad

doi:10.1177/16878132221133712

Cited by 3 publications

(1 citation statement)

References 18 publications

(20 reference statements)

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“…In recent years, many scholars have conducted indepth studies on the kinetic properties of single droplet. [6][7][8][9] Yin et al 10 used numerical methods to study the spreading and slipping characteristics of a single droplet colliding an inclined hydrophobic surface. It was found that the maximum spreading diameter of the droplet becomes larger as the inclination angle of the wall increases, and the oscillation of the droplet becomes stronger and more unstable.…”

Section: Introductionmentioning

confidence: 99%

Study of spreading, vibration, and fracture behavior of double droplets after positive collision

Sun,

Ma,

Tian

et al. 2024

Advances in Mechanical Engineering

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The droplet collision phenomenon is a more complex heat and mass transfer phase transition phenomenon, which is subject to the joint action of kinetics and thermodynamics. During the collision process, the mutual fusion interference of double droplets makes the kinetic mechanism after droplet collision more complicated, and its in-depth study can provide important theoretical support for the fields of engineering applications, industrial production and wetted wall design. In order to investigate the kinetic behavior of double droplets positive collision, this paper mainly combines experimental and numerical simulation methods to investigate the spreading, vibration and fracture characteristics of double droplets of the same volume after collision. Firstly, the rebound vibration of the fused droplet and single droplet is equivalent to a single-degree-of-freedom damped vibration system, and the spreading and vibration characteristics of the single droplet and the double droplets after collision under the same collision velocity are analyzed comparatively by experimental methods. The results show that when the droplet does not fracture, the spreading factor and damping coefficient of single droplet and double droplets gradually increase with the increase of collision velocity, and the vibration time gradually decreases. The damping coefficient and vibration time of the double droplets are higher than that of the single droplet, while the spreading factor is lower than that of the single droplet. Then, the double droplets positive collision phenomenon is studied in depth, and it is found that the spreading factor of the fused droplet increases with the increase of the droplet diameter, the collision velocity, and the wall contact angle. Affected by the low wall temperature, the fused droplet undergoes a phase transition, which affects the bottom flow of the droplet, leading to an increase in the damping coefficient and a decrease in the vibration time. With the decrease of the collision velocity and wall contact angle, the damping coefficient gradually increases and the vibration time decreases. Finally, the numerical simulation method reveals that rebound fracture and spreading fracture phenomena occur after double droplets positive collision, and the critical values of the collision velocity required for the occurrence of rebound fracture and spreading fracture are found. This provides a reliable theoretical basis for the study of the heat and mass transfer process after the collision of multiple droplets on the wall.

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Section: Introductionmentioning

confidence: 99%

Study of spreading, vibration, and fracture behavior of double droplets after positive collision

Sun,

Ma,

Tian

et al. 2024

Advances in Mechanical Engineering

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Variation in sprinkler irrigation droplet impact angle on the physical crusting properties of soils

Zhang,

Zheng,

Zhu

et al. 2023

Agricultural Water Management

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Three-dimensional numerical simulation and theoretical model of a hollow droplet impacting on a solid surface

Yang,

Chen,

Yan

et al. 2024

Physics of Fluids

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The phenomenon of a hollow droplet impacting on a solid surface is widely found in various fields. The dynamic characteristics of hollow diesel droplets impacting on a solid surface are studied by combining numerical simulation and theoretical analysis. The dynamic contact angle model presented in this paper couples the advantages of existing dynamic contact angle models for simulating both the spreading and retracting stages. It also considers the continuous variation of the contact angle during the maximum spreading state. Compared to existing models, the maximum error has been reduced from 14.9% to 4.6%. The effects of impact velocity, impact angle, and volume ratio of a hollow droplet on the spreading and jetting characteristics are investigated by three-dimensional numerical simulations. It is found that air entrainment occurred in the counter-jet, and the presence of the impact angle increased the asymmetry of the counter-jet and spreading liquid film, promoting fingerlike splashing at the front liquid film. Based on energy conservation law, the theoretical prediction models of the maximum spreading coefficient of the hollow droplet impacting on the surface and the velocity of the counter-jet at the maximum spreading state are established using the multi-regional modeling method and the energy distribution principle. Compared with existing hollow droplet theoretical models, the proposed theoretical models exhibit a more concise expression, higher accuracy, and wider applicability range.

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Surveying the effects of concave obstacles with different edge walls on hollow glycerin droplet impacting using the volume of fluid approach

Cited by 3 publications

References 18 publications

Study of spreading, vibration, and fracture behavior of double droplets after positive collision

Study of spreading, vibration, and fracture behavior of double droplets after positive collision

Variation in sprinkler irrigation droplet impact angle on the physical crusting properties of soils

Three-dimensional numerical simulation and theoretical model of a hollow droplet impacting on a solid surface

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