Object interactive combustion simulation method based on physics

A simulation method and interactive technology, applied in image data processing, 3D image processing, animation production, etc., can solve the problem that the deformation effect of three-dimensional objects cannot be simulated visually, and achieve the effect of improving design efficiency

CN101561939AInactive Publication Date: 2009-10-21TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2009-10-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an object interactive combustion simulation method based on physics, which is characterized in that the method mainly comprises the following steps of: 1) adopting a hydrodynamic theory to draw flame; 2) simulating the spreading of the flame on an object; 3) stimulating the evolution of a combustion interface; and 4) simulating the object deformation caused by the combustion. The method calculates the deformation degree of a region according to the heating difference and the decomposition difference of a pair of FFD control vertexes mapped onto a cell by adopting the simulation based on gradient change for the spreading of the flame and utilizing a level set method to trace back the change of an object shape and realistically realizes the deformation effect when a three-dimensional object combusts, and vividly shows the interaction effect of the flame and the object during the combustion. The method provides a convenient and quick design tool for film and TV special effect producers, animation mentors and the like, can also be used for combustion simulation of objects in fire hazard, and has important significance on the suppression, rescue and evaluation of the fire hazard and the like.
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Description

technical field

[0001] The invention relates to a realistic simulation method of object combustion, in particular to a physics-based interactive combustion simulation method for objects. Background technique

[0002] Realistic simulation of burning objects includes flame simulation, flame spread simulation, and deformation simulation of objects during combustion. However, existing techniques mainly focus on the simulation of the flame itself. The spread of flame and the deformation of objects caused by burning are integral parts of the phenomenon of burning, and its realistic simulation directly affects the fidelity of the scene.

[0003] For the realistic simulation of flames, there are two main types of current methods: heuristic methods and physics-based methods. Reeves used particle systems to simulate flame phenomena (Reeves WT. Particle systems-a technique for modeling a class offuzzy objects. In: Proceedings of SIGGRAPH, 1983.359-376.). Pakeshi et al. proposed a fl...

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Embodiment Construction

[0026] see figure 1 , the specific embodiment of the present invention is as follows ( Figure 2-Figure 3 It is the rendering of the present invention):

[0027] Step 1: Draw the flame using the theory of fluid mechanics: model the motion of the flame based on the Navier-Stokes equations, as shown in the following formula:

[0028] ▿ · u → = 0

[0029] ∂ u ∂ t = - ( u → · ▿ ) u → - 1 ρ p + υ ▿ 2 u → + f → - - - ( ...