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图学学报

• 专论：第18届中国虚拟现实大会暨第8届国际虚拟现实与可视化会议(ChinaVR & ICVRV 2018 青岛 ) • 上一篇    下一篇

真实感固流交互动画的统一物质点法模拟

  

  1. 华北电力大学控制与计算机工程学院，河北 保定 071003
  • 出版日期:2019-06-30 发布日期:2019-08-02
  • 基金资助:
    河北省自然科学基金项目(F2016502069)；国家自然科学基金项目(61502168)；北京市自然科学基金项目(4182018)；中央高校基本科研业 务费专项资金(2018MS068)

Unified Material Point Method for Realistic Simulation of  Fluid-Solid Interaction

  1. School of Control and Computer Engineering, North China Electric Power University, Baoding Hebei 071003, China
  • Online:2019-06-30 Published:2019-08-02

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摘要： 固流交互模拟是基于物理的流体模拟技术的重要研究内容，其中如何解决非穿透 和滑移接触是难点。为此，提出一种真实感固流交互动画的统一物质点法模拟方法。首先，给 出一种基于物质点法的快速微可压缩流体模拟方法，并在统一背景欧拉网格上对固体和流体动 量方程进行求解；其次，检测固流接触区域并在其上构建局部多重背景网格，给出一种动量守 恒保持的速度修正方法对固体和流体各自网格结点进行速度修正，从而实现固流交互的非穿透 和滑移接触效果模拟。实验结果表明，该方法可以模拟稳定、真实的固流交互动画，适用于计 算机图形学和虚拟现实领域中的真实感模拟应用。

关键词: 物质点法, 固流交互, 流体模拟, 物理模拟

Abstract: The simulation of fluid-solid interaction is an important research topic of physically based simulation technology. It is particularly difficult to solve the problems of non-penetration and slip contact at the interface . This paper puts forward a unified material point method (MPM) for realistic simulation of fluid-solid interaction animation. First, we propose an MPM-based method for simulating weakly compressible fluid, and solve the momentum equation of fluid and solid on the unified background grid. Second, we construct multiple background grids in fluid-solid contact regions, and propose a momentum-conserving velocity-position correction scheme to prevent the penetration artifacts and simulate slip contact. The results demonstrate that the proposed method produces stable and realistic fluid-solid coupling animations which can be applied to computer graphics and virtual reality.

Key words: material point method, fluid-solid coupling, fluid simulation, physically based simulation