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dc.contributor.authorKim, Byungmoon
dc.contributor.authorLiu, Yingjie
dc.contributor.authorLlamas, Ignacio
dc.contributor.authorRossignac, Jaroslaw R.
dc.date.accessioned2007-01-09T16:09:08Z
dc.date.available2007-01-09T16:09:08Z
dc.date.issued2006
dc.identifier.urihttp://hdl.handle.net/1853/13113
dc.description.abstractLiquid and gas interactions often contain bubbles surrounded by thin liquid films. Simulation of these liquid films is challenging since they quickly become thinner than the grid resolution, which leads to premature bursting or merging of the bubbles. We prevent this thinning process by applying a disjoining force to the film, obtaining bubbles that last much longer without bursting or merging. The surface tension on the liquid film is the next diffuculty. Since the level set is not differentiable at the center of the thin liquid film, the curvature computed from the level set gradient is noisy, and the thin liquid film ruptures quickly. To prevent this, we compute the surface tension from the local isosurface, obtaining long-lasting liquid films. However, since bubbles stay longer without bursting or merging, the volume loss of each bubble is noticeable. To solve this problem, we modify the pressure projection to produce a velocity field whose divergence is controlled by the proportional and integral feedback. This allows us to preserve the volume or, if desired, to inflate or deflate the bubbles. In addition to premature bursting and volume change, another difficulty is the complicated liquid surface, which increases memory and computational costs. To reduce storage requirement, we collocate the velocity and pressure to simplify the octree mesh. To reduce the computational complexity of the pressure projection, we use a multigrid method.en
dc.format.extent1418556 bytes
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen
dc.publisherGeorgia Institute of Technologyen
dc.relation.ispartofseriesGVU Technical Report;GIT-GVU-06-10en
dc.subjectFoamen
dc.subjectBubblesen
dc.subjectFluiden
dc.subjectOctreeen
dc.subjectLevel seten
dc.titleSimulation of Bubbles and Liquid Filmsen
dc.typeTechnical Reporten


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