Animating bubble interactions in a liquid foam

Busaryev, Oleksiy; Dey, Tamal K.; Wang, Huamin; Ren, Zhong

doi:10.1145/2185520.2185559

Cited by 44 publications

(16 citation statements)

References 36 publications

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“…Since simulating density ratios in the order of ρwater/ρair would require considerably more computational effort, there exist alternative air bubble generation techniques to avoid multi-phase simulations (e.g. [Hong et al 2008;Ihmsen et al 2011a;Busaryev et al 2012]). We believe that the realism of our results can be further improved by using such a method.…”

Section: Discussion and Future Workmentioning

confidence: 99%

Versatile surface tension and adhesion for SPH fluids

2013

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Figure 1: A water crown emerges as a result of the impact of a water droplet into a filled container. Our surface tension force allows realistic simulation of such natural phenomena. AbstractRealistic handling of fluid-air and fluid-solid interfaces in SPH is a challenging problem. The main reason is that some important physical phenomena such as surface tension and adhesion emerge as a result of inter-molecular forces in a microscopic scale. This is different from scalar fields such as fluid pressure, which can be plausibly evaluated on a macroscopic scale using particles. Although there exist techniques to address this problem for some specific simulation scenarios, there does not yet exist a general approach to reproduce the variety of effects that emerge in reality from fluidair and fluid-solid interactions. In order to address this problem, we present a new surface tension force and a new adhesion force. Different from the existing work, our surface tension force can handle large surface tensions in a realistic way. This property lets our approach handle challenging real scenarios, such as water crown formation, various types of fluid-solid interactions, and even droplet simulations. Furthermore, it prevents particle clustering at the free surface where inter-particle pressure forces are incorrect. Our adhesion force allows plausible two-way attraction of fluids and solids and can be used to model different wetting conditions. By using our forces, modeling surface tension and adhesion effects do not require involved techniques such as generating a ghost air phase or surface tracking. The forces are applied to the neighboring fluidfluid and fluid-boundary particle pairs in a symmetric way, which satisfies momentum conservation. We demonstrate that combining both forces allows simulating a variety of interesting effects in a plausible way.

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Section: Discussion and Future Workmentioning

confidence: 99%

Versatile surface tension and adhesion for SPH fluids

2013

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“…Also, with similar motivation to ours for droplets, interactions between other small-scale multi-phase phenomena have been considered, such as bubbles [Busaryev et al 2012;Patkar et al 2013].…”

Section: Related Workmentioning

confidence: 92%

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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“…Cleary et al [2007] augmented an SPH liquid simulator with a discrete bubble model, using cohesion forces to encourage the formation of foam "rafts" on the liquid surface, while Ihmsen et al proposed a method to layer foam onto an SPH animation as a post-process [Ihmsen et al 2012]. To better approximate the foam geometry and to improve volume preservation, Busaryev et al [2012] exploited the properties of Voronoi diagrams. Hong et al coupled an SPH bubble model with an Eulerian liquid to enliven the bubble behavior [Hong et al 2008].…”

Section: Particle Models For Foams and Bubblesmentioning

confidence: 99%

Continuum Foam

et al. 2015

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We consider the simulation of dense foams composed of microscopic bubbles, such as shaving cream and whipped cream. We represent foam not as a collection of discrete bubbles, but instead as a continuum. We employ the Material Point Method (MPM) to discretize a hyperelastic constitutive relation augmented with the Herschel-Bulkley model of non-Newtonian viscoplastic flow, which is known to closely approximate foam behavior. Since large shearing flows in foam can produce poor distributions of material points, a typical MPM implementation can produce non-physical internal holes in the continuum. To address these artifacts, we introduce a particle resampling method for MPM. In addition, we introduce an explicit tearing model to prevent regions from shearing into artificially-thin, honey-like threads. We evaluate our method's efficacy by simulating a number of dense foams, and we validate our method by comparing to real-world footage of foam.

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Animating bubble interactions in a liquid foam

Cited by 44 publications

References 36 publications

Versatile surface tension and adhesion for SPH fluids

Versatile surface tension and adhesion for SPH fluids

Physically-based droplet interaction

Continuum Foam

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