Rapid search method for discrete element pore system based on GPU matrix calculation

Abstract

The invention discloses a rapid search method for a discrete element pore system based on GPU matrix calculation. The method comprises the following steps of: establishing a grid number matrix; a preliminary adjacent particle array is established, each particle being centered relative to its adjacent particle; first, a neighbor matrix N is obtained in discrete element calculation; and sorting theN matrixes in the row direction according to the connection angles, and converting the N matrixes into a connection matrix C; and using a connection matrix control search algorithm to find out a reverse connection index matrix CI of the connection matrix C and a next connection index matrix CN; and then, starting from the initial connection, a next connected index matrix CN is used for searching nodes forwards until the nodes return to the original point, and all pores of the accumulation body are obtained through the method. According to the method, the speed of a discrete element numerical method is remarkably increased, a rapid and simple method is provided for finding all holes in the fluid-solid coupling process, and dynamic simulation of a large-scale fluid-solid coupling system canbe achieved.

Description

Technical field [0001] The invention relates to a particle discrete element simulation, in particular to searching all pores in a two-dimensional discrete element accumulation body. Background technique [0002] A large number of important engineering problems in geotechnical engineering, geological engineering and energy engineering involve complex fluid-solid coupling processes, such as tunnel water and mud inrush, grouting process, sand base liquefaction, ground settlement, hydraulic fracturing, etc. Since conventional numerical simulation methods such as finite element method or element-free method cannot fully consider the fluid-solid interaction and the progressive change of porosity and seepage caused by the transition and loss of solid particles, it is difficult to truly simulate the fluid-solid coupling process. Seepage and seepage failure law. [0003] However, discrete element numerical simulation can solve this type of problem very well. In the numerical simulation of...

AI Technical Summary

Problems solved by technology

Since conventional numerical simulation methods such as finite element method or element-free method cannot fully consider the fluid-solid interaction and the gradual change of porosity and seepage caused by the transition and loss of solid particles, it is difficult to truly simulate the process of fluid-solid interaction. Seepage and seepage damage law

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