Coagulation phenomenon simulation method based on particle model

A simulation method and particle technology, applied in the field of physical simulation, can solve the problems of not paying attention to details, and the simulation of air heat exchange is not intuitive, and achieve the effect of preventing particle penetration

Active Publication Date: 2017-05-10
EAST CHINA NORMAL UNIVERSITY
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem that the existing air heat exchange simulation is not intuitive and does not pay attention to details, and provides a simulation method of condensa

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  • Coagulation phenomenon simulation method based on particle model
  • Coagulation phenomenon simulation method based on particle model
  • Coagulation phenomenon simulation method based on particle model

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Embodiment

[0086] figure 2 Three different boundary processing methods are shown, which are virtual force method, Ghost particle method and the method of the present invention in sequence. The circular particles in the middle of the figure represent the solid particles involved in the boundary processing method, and the rest of the particles surrounded by the outside are air particles. The movement trend of air particles is from left to right.

[0087] The virtual force method shown in the picture on the left exerts a large force on close-range particles. In the left half of the picture, you can see a vacuum zone between the air and the solid, while in the right half of the picture, you can see that the air particles have a clear tends to move away from solid particles. The ghost particle method in the middle involves a large number of particles and can handle boundary particles well. However, it needs frequent sampling and relaxation operations on the surface and volume of solids, wh...

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Abstract

The invention discloses a coagulation phenomenon simulation method based on a particle model. The method includes the steps that 1, discrete modeling is conducted on the phenomenon that gas coagulates on the solid surface, wherein the influence of the dew point temperature and the relative humidity property in a humidity diffusion model on the details of the coagulation phenomenon is considered; 2, a soil-liquid coupled boundary density correction algorithm is proposed, the problem of particle loss of a smoothed-particle hydrodynamics model at the boundary is solved, and meanwhile particle penetration is prevented under the condition that the time step is not decreased; 3, a particle system is used for conducting discrete modeling on air, the simulation process can be expressed more visually, and adjustment and design can be conducted easily. By applying the method, the flow property, heat conduction property and the like of air can be conveniently adjusted, and the problems that existing air heat exchange phenomenon simulation is not visual in effect and lacks enough details are solved; the method has certain practical value.

Description

technical field [0001] The invention belongs to the field of physical simulation, in particular to a simulation method of condensation phenomenon based on a particle model, which involves fluid dynamics, GPU parallelism, air diffusion and heat exchange theory, computer graphics and the like. Background technique [0002] The phenomenon of heat exchange of air plays a very important role in virtual reality, medicine, manufacturing industry and other fields. The classic modeling methods in simulation include grid method and particle method. In 3D, the grid method divides objects into blocks and discretizes them according to the force interaction between blocks and their own physical laws of deformation. It has great advantages in scene simulation with small deformation and insensitive to details. However, the grid method is difficult to describe the local details, and cannot accurately calculate the physical quantities used to describe the details. In contrast, the particle ...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 王长波张泰滺施佳俊
Owner EAST CHINA NORMAL UNIVERSITY
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