A Simulation Method of Fluid Under the Influence of Dynamic Obstacles

Abstract

The invention relates to a simulation technology imitating a dynamic barrier to influence lower fluid behaviors on the basis of a physical mode. The technology comprises the steps of sequentially calculating the convective term, the outer force term and the pressure term in a hydrodynamic equation (Navier-Storkes equation); upgrading physical quantities, such as speed and pressure, of fluid; finishing the simulation calculation of the fluid. When the pressure term is calculated, mutual influence of the fluid and the barrier is considered, and a coupled linear equation between the fluid and the barrier is set up according to the Lagrange's equation of motion of the barrier and the uncompressed conditions of the fluid. The pressure term is upgraded through solving the linear equation. Due to the fact that the simulation calculation of the fluid is realized in a GPU, and the simulation of the barrier is executed in a CPU, in order to make the fluid to be coupled with the barrier, a voxelization process is conducted on the dynamic barrier in the simulation process according to the simulation technology, the dynamic barrier is is mapped onto a simulation grid of the fluid, and the calculation of fluid pressure is finished through the combination of the CPU and the GPU.

Description

technical field [0001] The invention belongs to the technical field of virtual reality, and in particular relates to a method for simulating a fluid under the influence of a dynamic obstacle in a physical manner based on the combination of a CPU and a GPU. Background technique [0002] In real life, there are many phenomena about fluids, such as rising smoke, flowing rivers, burning flames and so on. In the fluid, there are often various obstacles, both dynamic and static, such as fish swimming freely in the river, smoke passing through the forest, etc. In the field of computer simulation of natural phenomena, fluid simulation is one of the important research directions. It is like a useful building block and the basis for simulating many natural phenomena. However, due to its huge computational cost, it has been only in the domain of high-quality offline rendering. In real-time applications, the effects of 3D fluids often rely on particle systems. Although particle system...

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Problems solved by technology

However, due to its huge computational cost, it has always been only in the field of high-quality offline rendering

In real-time applications, the effects of 3D fluids often rely on particle systems. Although particle systems can produce very attractive results, they do not conform to the real appearance and behavior of fluids. The simulation of real-time fluids is still a kind of Challenges, especially the simulation of various obstacles in the fluid

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