Modeling of droplet collision-induced breakup process

Ko, Gwon Hyun; Ryou, Hong Sun

doi:10.1016/j.ijmultiphaseflow.2005.02.004

Cited by 68 publications

(37 citation statements)

References 9 publications

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“…Previous applications of fragmenting models [Kim et al 2009;Ko and Ryou 2005;Munnannur and Reitz 2007] have assumed simpli ed criteria for satellite creation, merging all satellites from a collision into a single 'parcel' and initialising them with entirely uniform values. To allow satellites to join our system as otherwise normal droplets, we cannot use these simpli cations.…”

Section: Satellite Creationmentioning

confidence: 99%

Physically-based droplet interaction

Jones¹,

Southern²

2017

Proceedings of the ACM SIGGRAPH / Eurographics Symposium on Computer Animation

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In this paper we present a physically-based model for simulating realistic interactions between liquid droplets in an e cient manner. Our particle-based system recreates the coalescence, separation and fragmentation interactions that occur between colliding liquid droplets and allows systems of droplets to be meaningfully represented by an equivalent number of simulated particles. By considering the interactions speci c to liquid droplet phenomena directly, we display novel levels of detail that cannot be captured using other interaction models at a similar scale. Our work combines experimentally validated components, originating in engineering, with a collection of novel modi cations to create a particle-based interaction model for use in the development of mid-to-large scale dropletbased liquid spray e ects. We demonstrate this model, alongside a size-dependent drag force, as an extension to a commonly-used ballistic particle system and show how the introduction of these interactions improves the quality and variety of results possible in recreating liquid droplets and sprays, even using these otherwise simple systems.

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Section: Satellite Creationmentioning

confidence: 99%

Physically-based droplet interaction

Jones¹,

Southern²

2017

Proceedings of the ACM SIGGRAPH / Eurographics Symposium on Computer Animation

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“…The researchers have found that possible droplets collision outcomes from observing experimental results can exhibit five distinct collision regimes, namely: (I) coalescence following minor deformation, (II) bouncing, (III) coalescence following substantial deformation, (IV) coalescence followed by separation for near head-on collisions, and (V) coalescence followed by separation for off-center collisions [5,6]. However, due to the quite large number of parameters involved in the process, it appears more and more difficult to control the important parameters accurately in experiment, especially the Weber number is high.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Weber Numbers on Central Collision Between Two Droplets

Feng¹,

Wansheng²,

Zheng³

et al. 2015

Proceedings of the 2015 International Conference on Mechatronics, Electronic, Industrial and Control Engineering

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“…Larger droplets with higher inertia provide a longer contact time, while a higher level of turbulence increases the probability that an eddy will separate the droplets. On the basis of a collision Weber number and an impact parameter as controlling factors for the different outcomes, Qian et al [7] and Ko et al [10] produced a map for the identification of the collision regimes and post-characteristics of the droplet collisions. The relevant expressions read:…”

Section: Introductionmentioning

confidence: 99%

“…In the original references by Qian et al [7] and Ko et al [10], the droplet diameter is based on the average size of the colliding droplets, while the diameter of the smaller colliding droplet was considered in others, according to Kollár et al [11].…”

Section: Introductionmentioning

confidence: 99%

Mean Droplet Size and Local Velocity in Horizontal Isothermal Free Jets of Air and Water, respectively, Viscous Liquid in Quiescent Ambient Air

2006

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Measurements using two-dimensional Phase Doppler Anemometry as well as high speed cinematography in free jets at several nozzle exit pressures and mass flow rates, show that the Sauter mean droplet diameter decreases with increasing air and liquid-phase mass flow ratio due to the increase of the air stream impact on the liquid phase. This leads to substantial liquid fragmentation, respectively primary droplet breakup, and hence, satellite droplet formation with small sizes. This trend is also significant in the case of a liquid viscosity higher than that of water. The increased liquid viscosity stabilizes the droplet formation and breakup by reducing the rate of surface perturbations and consequently droplet distortions, ultimately also leading, in total, to the formation of smaller droplets. The droplet velocity decreases with the nozzle downstream distance, basically due to the continual air entrainment and due to the collisions between the droplets. The droplet collisions may induce further liquid fragmentation and, hence, formation of a number of relatively smaller droplets respectively secondary breakup, or may induce agglomeration to comparatively larger liquid fragments that may rain out of the free jet.

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Modeling of droplet collision-induced breakup process

Cited by 68 publications

References 9 publications

Physically-based droplet interaction

Physically-based droplet interaction

The Effects of Weber Numbers on Central Collision Between Two Droplets

Mean Droplet Size and Local Velocity in Horizontal Isothermal Free Jets of Air and Water, respectively, Viscous Liquid in Quiescent Ambient Air

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