An Efficient Simulation Method for Fluid-Structure Interaction in Complex Scenes Based on Hybrid Physics and Non-Physics

Abstract

The invention discloses a physical and non-physical mixture-based complex scene fluid-solid coupling efficient simulation method. The method comprises the steps of 1) performing incompressible fluid simulation, combining an Euler method and a Lagrange method, and proposing an implicit particle method-based zero-divergence smooth particle fluid dynamics method; 2) performing dynamics problem solving in fluid-solid coupling, subdividing a motion problem of a simulation object into three sub-problems according to object attributes, and solving the three sub-problems by using different methods respectively to realize a multi-dimensional classification combination computing framework; and 3) combining a strain energy density concept in fracture mechanics with Voronoi spatial segmentation to realize a physical perception-based crushing method. The simulation efficiency problem difficult to solve in complex fluid-solid coupling scene simulation is solved. Compared with a conventional fluid-solid coupling method, the method can simulate a fluid scene with richer details under the same system resources, and can meet the demand of simulating solid crushing under fluid impact.

Description

technical field [0001] The invention relates to the field of particle-based fluid simulation and fluid-solid two-way coupling simulation, in particular to an efficient simulation method for fluid-solid coupling in complex scenes based on the mixture of physics and non-physics. Background technique [0002] In the field of graphics, the use of fluid-structure interaction methods is often accompanied by fluid simulation. From the calculation object, it can be divided into one-way solid-to-fluid coupling, one-way fluid-to-solid coupling and two-way coupling ). In the solid-fluid one-way coupling method, the solid moves according to the set state, and the fluid will not affect the movement path of the solid. Correspondingly, in the fluid-solid one-way coupling method, the influence of the fluid on the motion of the solid is determined by integrating the fluid pressure and torsional force on the contact surface. However, these two methods can only be used simply as the boundar...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the existing fluid-solid coupling simulation in the field of graphics is limited to a small scene scale due to the limitation of calculation efficiency, and it is impossible to simulate the effects of solid breaking and other effects during the coupling process, and proposes a physics-based Efficient simulation method of fluid-structure interaction in complex scenes mixed with non-physics

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