Fluid-solid interaction simulation method based on video reconstruction and SPH model

Abstract

The invention discloses a fluid-solid interaction simulation method based on video reconstruction and an SPH model. The fluid-solid interaction simulation method includes steps: 1), adopting a bright-dark recovery shape method to quickly reconstruct fluid surface geometric information in video, and acquiring a surface height field of each frame of input image; 2), combining the height fields with a shallow water equation, and calculating to acquire a speed field on the surface of fluid in a form of a minimizing energy equation; 3), using the surface geometric information as a boundary constraint condition to be discretized into a whole three-dimension body to acquire volume data; 4), guiding the volume data reconstructed in the video into an SPH simulation scene to serve as an initial condition of the simulation scene, and interacting with other virtual environment objects in the scene. By the fluid-solid interaction simulation method, high-accuracy data reconstruction can be realized, fluid surface details can be retained, bidirectional interaction simulation is performed on the basis of reconstructed data and a physical simulation model, fluid animation effect closer to real condition is acquired, algorithm complexity is low, and the method has high creativity compared with related algorithms.

Description

technical field [0001] The invention belongs to the field of computer graphics, in particular to a fluid-solid interactive simulation method based on video reconstruction and SPH model, which includes reconstruction of fluid surface height field and velocity field, SPH fluid simulation method and fluid-solid coupling simulation. Background technique [0002] Fluid, including gas and liquid, multiphase flow and mixed flow, is a part of complex phenomena in nature, and fluid reconstruction and simulation are essential in engineering applications and theoretical research. In the field of graphics, it is often necessary to draw and simulate the movement process of fluids, such as natural phenomena such as floods that burst dikes, rough waves, and debris flow disasters. At the same time, fluid animation has been widely used in the fields of special effects for movies and games, natural disaster simulation prevention, and engineering applications. Applications. In the past two de...

AI Technical Summary

Problems solved by technology

Although physics-based methods have so far become the main method for generating realistic fluid animations, the three numerical approximation-based methods have their own limitations. These methods rely on the initial state and face the problem of numerical Bug issues, including volume loss and surface detail loss

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