Numerical investigation on the influence of surface tension and viscous force on the bubble dynamics with a CLSVOF method

Wang, Zhiying; Li, Yikai; Huang, Biao; De-ming, Gao

doi:10.1007/s12206-016-0516-8

Cited by 24 publications

(6 citation statements)

References 44 publications

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“…While the LS method is not mass-conserving, the VOF satisfies mass conservation. On the other hand, surface normal and curvature can be calculated by the LS method accurately, but they cannot be estimated by the VOF precisely (Wang et al 2016). The coupled level-set volume-of-fluid (CLSVOF) technique was proposed and developed for complex flows to overcome the disadvantages of the LS and VOF techniques.…”

Section: Governing Equations and Numerical Methodsmentioning

confidence: 99%

Non-Newtonian effects on solid particles settling in sharp stratification

Amooshahi

Bayareh

2020

Fluid Dyn. Res.

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Gravitational settling of solid particles through density interfaces is studied numerically when at least one of the fluids is non-Newtonian. The Carreau-Yasuda model is used to model the shear-thinning behavior of the non-Newtonian fluid. The coupled level-set and volume-of-fluid method is used to track the interface between the two fluids. It is found that the presence of shear-thinning fluids significantly affects the settling dynamics of solid spheres. For lower power index, the lighter fluid is more entrained by the sphere into the denser fluid. It is revealed that the sphere velocity after impacting the interface increases with the power index, density ratio and buoyancy jump. The shear-thinning effect of the upper and lower non-Newtonian fluids is quite noticeable and the motion of the solid sphere before crossing the interface is different to the case of Newtonian fluids. For the case of upper Newtonian fluid, there is a smaller resistance force at the interface, which causes the sphere to fall in the lower non-Newtonian fluid with about 90% of its terminal velocity.

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Section: Governing Equations and Numerical Methodsmentioning

confidence: 99%

Non-Newtonian effects on solid particles settling in sharp stratification

Amooshahi

Bayareh

2020

Fluid Dyn. Res.

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“…However, its oversimplification results in poor generalizability and accuracy, and human factors have a great impact on the calculation results. In the DNS-like method, the phase interface between the gas and liquid is directly identified using interface capture technology, which is of great significance to study the spray mechanism [66,67]. This method is distinguished from the DNS method, since the simulations such as interface identification and turbulence are still closed with models.…”

Section: Modeling Of Multiphase Flowmentioning

confidence: 99%

A Review of the Developments of the Characteristics and Mechanisms of Airless Spraying on Complex Surfaces

Wu,

Chen,

Liu

et al. 2023

Coatings

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The special surface appearance of complex surfaces restricts the coating film quality of spraying. The study of the atomization and film formation characteristics of typical complex surfaces, as well as the spraying mechanism, is essential for planning the spraying robotic trajectory and improving the spraying efficiency. In this paper, modeling and characteristics of the atomization and film formation process, based on CFD numerical simulations in previous studies, are systematically reviewed, focusing especially on airless spraying. In addition, the advantages and disadvantages of the existing research from the perspective of numerical models and methods are discussed. Finally, a further research direction for spraying on complex surface is prospected. Overall, a comprehensive and up-to-date review of spray atomization and film formation characteristics is considered valuable to practitioners and researchers in these fields, and will facilitate the further application of robotic spraying in the mechanical, automotive, marine, aerospace, petrochemical and other industries.

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“…The CLSVOF method is employed to capture the moving interface. The detailed information about treatment for gas-liquid interface is reported by the works of Wang et al [24].…”

Section: Eulerian Fluid Equationsmentioning

confidence: 99%

Numerical Investigation of the Dynamic Responses of Composite Material Subjected to Bubble Collapse

Ma¹,

Huang²,

Wang³

2017

Computational and Experimental Methods in Multiphase and Complex Flow IX

Self Cite

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The presence of composite materials is an alternative solution to effectively overcome the troubles caused by the occurrence of bubble collapse in the marine propulsion systems, such as noise, vibration, pressure pulsations, and heavy erosion. The objective of this paper is to apply computational method to investigate the deformation of composite material with clamped ends subjected to the pressure loads caused by a 2D single bubble with a non-spherical collapse. The Euler-Lagrangian numerical method is supposed to simulate the bubble shape evolution, the transient pressure loads, and the dynamic response between fiber layers. With emphasis on numerical method, the CLSVOF method is used to track the air-liquid interface and the Ghost Fluid method is adopted to simulate the incompressible flow. The numerical results reveal that the substantial increase in pressure fluctuations on the composite material boundary are caused by the bubble evolution process near the wall, involving the motion of bubble rising to the boundary, the formation of the re-entrant jet, and the splitting of the daughter bubble. The impact pressure load significantly contributes to the deformation of the composite material. Furthermore, the effect of standoff distance between the bubble and wall on the dynamic responses among the fiber layers of composite material boundary is preliminarily discussed.

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Numerical investigation on the influence of surface tension and viscous force on the bubble dynamics with a CLSVOF method

Cited by 24 publications

References 44 publications

Non-Newtonian effects on solid particles settling in sharp stratification

Non-Newtonian effects on solid particles settling in sharp stratification

A Review of the Developments of the Characteristics and Mechanisms of Airless Spraying on Complex Surfaces

Numerical Investigation of the Dynamic Responses of Composite Material Subjected to Bubble Collapse

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