Fluid simulation method for combining SPH and dynamic surface mesh

A technology for surface mesh and fluid simulation, applied in animation production, instrumentation, computing, etc., can solve problems such as difficult performance, limited resolution, etc.

Active Publication Date: 2014-04-09
PEKING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The implicit surface is limited by the resolution of spatial discretization, and it is often difficult to express such features;

Method used

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  • Fluid simulation method for combining SPH and dynamic surface mesh
  • Fluid simulation method for combining SPH and dynamic surface mesh
  • Fluid simulation method for combining SPH and dynamic surface mesh

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Embodiment Construction

[0067] The present invention will be described in detail below through specific embodiments and accompanying drawings.

[0068] The invention proposes a fluid simulation method combining explicit surface and SPH fluid. This approach enables explicit surface tracking of fluids sampled with particle systems, and automatically handles self-intersections and topology changes during the simulation, maintaining the quality of the triangular mesh. In this method, a new explicit surface-based adaptive resampling method is proposed. SPH simulations do not easily exhibit very thin and thin features, especially if the particle resolution is insufficient. On the basis of traditional SPH, if you want to reflect better details, you can increase the resolution of particles, but increasing the resolution will correspondingly increase the calculation cost in time and space. If adaptive resampling can be realized, limited computing resources can be reasonably allocated according to the thickn...

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Abstract

The invention relates to a fluid simulation method for combining SPH and a dynamic surface mesh. The method makes a display surface track fluid sampled through a particle system, self-crosslinking and topological changes are automatically processed in the simulation process, and quality of a triangular mesh is maintained; according to the method, a new self-adaptation resampling method based on the display surface is provided. SPH simulation displays very fine and thin characteristics with difficulty, and particularly, under the condition that the particle resolution ratio is not sufficient, even unnatural voids can further be formed. On the basis of traditional SPH, if people want to embody better details, the particle resolution ratio can be increased, but calculation cost for time and space can be correspondingly increased. According to the method, on the basis of the self-adaptation resampling method of the display surface, very refined fluid surface details can be simulated, so that the simulation effect is improved, and meanwhile simulation efficiency and speed can be improved.

Description

technical field [0001] The invention belongs to the technical field of computer graphics and animation, and relates to a fluid simulation data representation method and an efficient simulation calculation method for fluid motion and animation. Background technique [0002] In nature and in daily life, fluid is a very common form of matter. In many computer graphics applications, fluid simulation also occupies a very important position, such as animation, games and other entertainment fields, as well as applications in scientific visualization and medical applications. Now there are many fluid simulation and animation methods in computer graphics. The mainstream ones are the finite difference method based on the Euler viewpoint (commonly known as the Euler method) and the particle method based on the Lagrangian viewpoint (the meshless method, commonly known as the Lagrange method). Grange method). Both methods have advantages and disadvantages, and each has its application....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00G06T13/20
Inventor 李胜任毅王衡汪国平
Owner PEKING UNIV
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