Fluid-solid coupling method based on smoothed-particle hydrodynamics (SPH) and nonlinear finite elements

A technology of fluid dynamics and smooth particles, which is applied in special data processing applications, instruments, electrical digital data processing, etc., to achieve improved effects, high precision, and convenient effect control

Inactive Publication Date: 2014-04-02
BEIHANG UNIV
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Problems solved by technology

However, the current research on the real-time simulation of fluid and its coupling with fluid still faces many challenges, because there are more complex physical mechanisms behind these phenomena, and to achieve convincing simulation effects, multidisciplinary interdisciplinary theories, software and hardware are required Combined efficient algorithm design as support

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  • Fluid-solid coupling method based on smoothed-particle hydrodynamics (SPH) and nonlinear finite elements
  • Fluid-solid coupling method based on smoothed-particle hydrodynamics (SPH) and nonlinear finite elements
  • Fluid-solid coupling method based on smoothed-particle hydrodynamics (SPH) and nonlinear finite elements

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Embodiment Construction

[0029] figure 1 The overall processing flow of the fluid-solid coupling method based on SPH and nonlinear finite element is given, and the present invention is further described below in conjunction with other drawings and specific implementation methods.

[0030] The present invention provides a fluid-solid coupling method based on SPH and nonlinear finite elements, and the main steps are as follows:

[0031] 1. Collision detection method

[0032] In this method, the fluid is represented by particles, and the soft body is represented by finite element mesh. The main goal of collision detection is to detect whether particles collide with triangles. The main process includes establishing a space hash grid, throwing each collision detection unit (particle, triangle) into the hash grid, establishing a collision unit index, detecting whether the particle intersects with the triangle, and outputting the collision point. This method realizes the above process, and according to the...

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Abstract

The invention provides a fluid-solid coupling method based on smoothed-particle hydrodynamics (SPH) and nonlinear finite elements. The method comprises the following six steps: at a collision detection stage, detecting collision information of fluid particles with a finite element network; at an agent particle generation stage, generating collision agent particles presenting a finite element model according to the collision information for processing the collision between a fluid and a solid; at a coupling force calculation stage, calculating force generated by collision between agent particles and fluid particles according to the position and speed relations of the agent particles and the fluid particles; at a coupling force allocation stage, controlling the position relation of the agent particles and the finite element model and allocating the coupling force to a finite element stress model; at a position and speed updating stage, driving the position and speed update of the finite element model and a fluid particle model according to the calculated coupling force; at a non-penetration modification stage, modifying penetration fluid particles according to an updated position.

Description

technical field [0001] The invention relates to the technical field of fluid simulation and fluid-solid coupling, in particular to a fluid-solid coupling method based on smoothed-particle hydrodynamics (SPH) and nonlinear finite elements. Background technique [0002] Since the 1990s, the research on fluid simulation and fluid-structure interaction has been developed for more than 20 years. Research in this field involves multiple academic directions such as computational fluid dynamics, continuum mechanics, numerical calculation, differential ensemble, and computer graphics. It has high practical value in game entertainment, scientific computing, and simulation training. A very challenging research hotspot. In recent years, with the popularization of GPU parallel processing technology, physics-based fluid simulation and fluid-solid coupling technology have developed rapidly and become a new research hotspot in the field of computer graphics. With the help of GPU parallel a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 郝爱民杨丽鹏李帅秦洪
Owner BEIHANG UNIV
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