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SPH-algorithm-based fluid simulation method and device

A fluid simulation and algorithm technology, applied in the field of computer simulation, can solve problems such as loss of tiny details, and achieve the effect of enhancing detail performance and improving fidelity

Inactive Publication Date: 2015-04-22
SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to provide a fluid simulation method and device based on the SPH algorithm, which aims to solve the problem of the loss of many tiny details caused by the fluid simulation method based on the SPH algorithm in the prior art

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Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] For fluid simulation, whether using the grid-based Euler method or the particle-based Lagrangian method, most of them use the Navier-stoke equation as the basic fluid motion physics equation to solve and simulate the force. The Navier-Stokes equation describes the momentum conservation motion equation of an incompressible fluid. For a constant temperature and viscous fluid, its basic physical quantities include velocity, mass, and pressure.

[0026] The usual representation of the Navier-Stokes equation is:

[0027] ∂ u →...

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Abstract

The invention belongs to the technical field of computer simulation, and provides an SPH-algorithm-based fluid simulation method and device. The method comprises the steps of initializing a flow field to generate discrete particles; calculating the density of each particle in the current flow field; according to the density of each particle, calculating the physical property of each particle, wherein the physical property comprises the eddy current confinement of each particle; according to the physical property of each particle, calculating the speed variation rate of each particle; according to the speed variation rate of each particle, updating the speed and position of each particle. Due to the fact that eddy current confinement is combined with the SPH algorithm in a seamless mode, the detail representation of fluid simulated based on the SPH algorithm is enhanced, and the fluid simulation fidelity is improved.

Description

technical field [0001] The invention belongs to the technical field of computer simulation, and in particular relates to a fluid simulation method and device based on an SPH algorithm. Background technique [0002] In the field of computer graphics, in recent years, the particle-based Lagrangian method has gradually become the main tool for fluid simulation, especially the smoothed particle hydrodynamics (Smoothed Partide Hydrodynamics, SPH) method, which can describe the medium more naturally The historical process of motion, simulate more fluid details, such as foam, water splash, etc., and deal with more complex fluid surfaces, and this method has a small amount of calculation and is easy to implement. [0003] However, due to the discretization of particles and the limitation of the simulation area, the SPH method inevitably increases the numerical dissipation, which will lead to the loss of many tiny details in the process of fluid simulation. Contents of the inventio...

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Application Information

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IPC IPC(8): G06F17/50
Inventor 陈珠超司伟鑫秦璟王琼王平安
Owner SHENZHEN INST OF ADVANCED TECH CHINESE ACAD OF SCI
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