Volume preserving viscoelastic fluids with large deformations using position-based velocity corrections

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• 作者：Tetsuya Takahashi ; Yoshinori Dobashi ; Issei Fujishiro…
• 关键词：Fluid simulation ; Viscoelasticity ; Deformation ; Volume preservation ; Velocity correction
• 刊名：The Visual Computer
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：32
• 期：1
• 页码：57-66
• 全文大小：1,705 KB
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• 作者单位：Tetsuya Takahashi (1)
  Yoshinori Dobashi (2)
  Issei Fujishiro (3)
  Tomoyuki Nishita (4)
  
  1. UEI Research, Keio University, Tokyo, Japan
  2. Hokkaido University, UEI Research, Sapporo, Japan
  3. Keio University, Tokyo, Japan
  4. UEI Research, Hiroshima Shudo University, Tokyo, Japan
  
• 刊物类别：Computer Science
• 刊物主题：Computer Graphics
  Computer Science, general
  Artificial Intelligence and Robotics
  Image Processing and Computer Vision
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-2315

文摘

We propose a particle-based hybrid method for simulating volume preserving viscoelastic fluids with large deformations. Our method combines smoothed particle hydrodynamics (SPH) and position-based dynamics (PBD) to approximate the dynamics of viscoelastic fluids. While preserving their volumes using SPH, we exploit an idea of PBD and correct particle velocities for viscoelastic effects not to negatively affect volume preservation of materials. To correct particle velocities and simulate viscoelastic fluids, we use connections between particles which are adaptively generated and deleted based on the positional relations of the particles. Additionally, we weaken the effect of velocity corrections to address plastic deformations of materials. For one-way and two-way fluid-solid coupling, we incorporate solid boundary particles into our algorithm. Several examples demonstrate that our hybrid method can sufficiently preserve fluid volumes and robustly and plausibly generate a variety of viscoelastic behaviors, such as splitting and merging, large deformations, and Barus effect. Keywords Fluid simulation Viscoelasticity Deformation Volume preservation Velocity correction