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Fluid simulation method based on Eulerian-Lagrangian coupling method

A fluid simulation and fluid technology, applied in the field of fluid simulation, to achieve good authenticity, ensure speed advantage, and high efficiency

Active Publication Date: 2015-01-07
BEIHANG UNIV +1
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Problems solved by technology

[0006] The technical problem solved by the present invention is to overcome the efficiency problem of the existing fluid simulation method, provide a fluid simulation technology based on the Euler-Lagrangian coupling method, solve the contradiction between the scale and details of the fluid simulation, and satisfy the To meet the need for real-time simulation of the fluid movement process

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  • Fluid simulation method based on Eulerian-Lagrangian coupling method
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  • Fluid simulation method based on Eulerian-Lagrangian coupling method

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Embodiment Construction

[0028] figure 1 The overall processing flow of the fluid simulation based on the Eulerian-Lagrangian coupling method is given, and the present invention is further described below in conjunction with other drawings and specific implementation methods.

[0029] The present invention provides a fluid simulation technology based on the Euler-Lagrangian coupling method, which is specifically implemented as LBM-SPH coupling fluid simulation, and the main steps are introduced as follows:

[0030] 1. Physical simulation of large-scale fluid

[0031] The present invention uses the LBM method to simulate the movement of large-scale fluids. LBM is developed from the Lattice Gas Automata (LGA) proposed and developed in the 1970s. Therefore, LBM can be regarded as a method for describing fluid movements. physical model. The LBM method improves problems such as noise and exponential complexity in the traditional LGA method. In LBM, the particle distribution function is used to replace t...

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Abstract

The invention discloses a fluid simulation method based on the Eulerian-Lagrangian coupling method. According to the aim of achieving efficient fluid simulation and the core idea of solving the N-S equation through the Eulerian method and the Lagrangian method to carry out fluid simulation, research is conducted through the multi-method coupling calculation method on the basis of SPH and LBM fluid simulation. Firstly, large-scale fluid field modeling is carried out through the LBM method based on Eulerian grids to build the main part of fluid simulation; then, simulation is carried out on fluid details such as spindrifts and water drops through the SPH method based on the Lagrangian particle idea, LBM fluid and SPH fluid are integrated by designing a coupling algorithm, and lifelike and rapid large-scale fluid simulation with details involved is achieved.

Description

technical field [0001] The invention relates to a fluid simulation technology based on the Euler-Lagrangian coupling method. Background technique [0002] At present, fluid simulation is developing rapidly in the direction of multi-discipline, multi-angle, and multi-platform. However, due to the limitation of existing hardware level and the limitation of simulation algorithm, there are still many difficulties in accurately, quickly and realistically restoring the fluid model. . In recent years, realistic fluid simulation that meets the requirements of engineering and scientific research has attracted the attention of domestic and foreign scholars and scientific research institutions. The research on realistic fluid simulation based on physics will undoubtedly face a huge challenge for researchers engaged in fluid related research and computer graphics researchers, and it is also very attractive. [0003] The physics-based fluid simulation methods are mainly divided into tw...

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Application Information

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IPC IPC(8): G06T17/30G06T15/00
CPCG06T15/005G06T17/30
Inventor 郝爱民李帅高阳
Owner BEIHANG UNIV
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