Simulation of droplet impact on liquid film with CLSVOF

Guo, Yali; Lan, Wei; Liang, Gangtao; Shen, Shengqiang

doi:10.1016/j.icheatmasstransfer.2014.02.006

Cited by 65 publications

(32 citation statements)

References 16 publications

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“…In the present paper the computational model for such a nonisothermal flow is formulated and validated within the framework of the volume-of-fluid-based (VOF) method for free-surface capturing [2]. Due to its relevance in many fields in engineering and industry, interfacial multiphase flow modeling has been the subject of various investigations regarding impingement of liquid jet, droplet impact on surfaces, rising gas bubbles, flow in thin liquid sheets, atomization and some of the more recent contributions are given in [3,4,5,6,7].…”

Section: Introductionmentioning

confidence: 99%

Computational Modeling and Simulation of Nonisothermal Free-surface Flow of a Liquid Jet Impinging on a Heated Surface

Berberović

Šikalo

2015

Procedia Engineering

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The study is aimed at formulating and validating the computational model for the nonisothermal two-phase flow with freesurfaces. The testing flow configuration consists of the liquid jet impacting on a heated wall generating simultaneous heat transfer from the wall surface. The interface capturing methodology implemented in the open-source software OpenFOAM based on the volume-of-fluid (VOF) model in the framework of Computational Fluid Dynamics (CFD) is extended to incorporate heat transfer. The potential of the model is evaluated by contrasting the results of numerical simulations to the existing experimental and numerical results. The computational procedure based on the numerical model demonstrates good qualitative and quantitative predictive capabilities by reproducing correctly the studied flow and heat transfer characteristics.

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Section: Introductionmentioning

confidence: 99%

Computational Modeling and Simulation of Nonisothermal Free-surface Flow of a Liquid Jet Impinging on a Heated Surface

Berberović

Šikalo

2015

Procedia Engineering

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“…The method combines the good conservation of the VOF method with the advantages of the Level-set method to deal with the local sharp corners of the interface, greatly improving the above two-interface methods. Liang et al (2014), Guo et al (2014), and Dai et al (2015) used the CLSVOF method to study droplet impacting on liquid film. The simulation results are in good agreement with experiments, and successfully solve some problems in the field of droplet impacting on liquid film.…”

Section: Simulation Methods and Modelmentioning

confidence: 99%

“…The effects of surrounding gas with different viscosity and density on crown were discussed, which was showed that the increase of viscosity and density leads to the decrease of expansion diameter and height. Guo et al (2014) studied the morphology of crown generated by droplet impacting on horizontal liquid film at different velocities and droplet impacting on different thickness liquid film at the fixed velocities. The phenomenon of bubble entrainment was captured.…”

Section: Introductionmentioning

confidence: 99%

Numerical study on characteristics of single droplet impacting on wetted surface

Chen

Wang

Mao

et al. 2020

Exp. Comput. Multiph. Flow

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In this paper, the mathematical and physical models of the single droplet impacting on liquid film are established. The axisymmetric numerical simulation of the single droplet impacting on liquid film is carried out by using the Couple Level-set and VOF (Volume of Fluid) numerical simulation method, which is verified by experiment, studying the influence of the liquid film thickness, surface tension, viscosity, and density of liquid on the liquid crown, and analyzing the thickness effect on the neck ejecta sheet. Through the analysis of pressure and velocity field, the mechanism of crown formation is studied. The results show that: (1) experiment and simulation are in good agreement, so CLSVOF method (the Couple Level-set and VOF) is suitable for research of droplet impacting on liquid film; (2) with the increase of liquid film thickness, the expansion radius and height of crown decrease, and the crater depth increases; (3) the surface tension, density, and viscosity of the fluid have influence on the crown; (4) ejecta sheet velocity decreases with the increase of the liquid film thickness but when H * > 1.0 (ratio of film thickness to droplet diameter), the ejecta sheet velocity does not change; (5) neck ejecta sheet is caused by neck pressure difference.

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“…The liquid film on the plate promoted microdroplet splashing. Guo et al [16] conducted a simulation study to investigate droplet evolution after colliding with a plate covered by liquid film with the combined level set and volume of fluid (CLSVOF) method. The splashing time is advanced by accelerated droplet motion and the spreading diameter tended to decrease with an increase in liquid film thickness.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Effect of Wall Roughness and Lubricant Film on the Adhered Fuel Film of N-Butanol-Diesel Blends after Spray Impingement

et al. 2018

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Abstract:The effect of wall roughness with different lubricant film thicknesses on the characteristics of adhered fuel films of diesel-n-butanol blending fuels after spray impingement has been investigated. Four steel plates with different types of roughness (root mean square height-Sq) that were coated with different lubricant film thicknesses (h l ) were used as impinged walls. The experimental conditions included dry walls (h l = 0), semi-wetted walls (SWW) with different thin oil films (0 < h l /Sq < 1), and fully wetted walls (FWW) with a thick lubricant film (h l > Sq). The results indicate that the adhered fuel mass ratio (ε) of blended fuel with 25% n-butanol (B25) was higher than that of blended fuel with 15% n-butanol (B15) under the same conditions. ε increased with an increase in Sq on the dry walls, but, under SWW conditions, it decreased with an increase in oil film thickness. The fuel film morphology was almost unaffected by the change in Sq, but the results implied that the roughness parameter-Skewness (Ssk) exerted a greater impact. The mean thickness h a and accumulated diameter D l of the adhered fuel film increased with an increase in h l , but, under FWW conditions, the effect of the roughness on the adhered film's features was insignificant.

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Simulation of droplet impact on liquid film with CLSVOF

Cited by 65 publications

References 16 publications

Computational Modeling and Simulation of Nonisothermal Free-surface Flow of a Liquid Jet Impinging on a Heated Surface

Computational Modeling and Simulation of Nonisothermal Free-surface Flow of a Liquid Jet Impinging on a Heated Surface

Numerical study on characteristics of single droplet impacting on wetted surface

Experimental Investigation on Effect of Wall Roughness and Lubricant Film on the Adhered Fuel Film of N-Butanol-Diesel Blends after Spray Impingement

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