DEM particle size and bonding attribute partition fluid-solid coupling analysis method based on CFD grid

• Main Authors: SHI YUPENG, XIE QIANG, TIAN XIAOXU, SONG ZHANPING, SUN WEICHEN, YANG PENGTAO, CAO ZHILIN
• Format: Patent
• Language: Chinese; English
• Published: 04.06.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention relates to the technical field of numerical simulation, in particular to a CFD (computational fluid dynamics) grid-based DEM (digital elevation model) particle size and bonding attribute partition fluid-solid coupling analysis method, which comprises the following steps of: establishing a fractured rock particle DEM model, and calibrating a fractured rock particle bonding strength parameter in the DEM model; cFD grid node coordinate information is imported into the DEM model; on the basis of CFD grid node coordinate information, the attribution of each CFD grid area and the center of each fractured rock mass particle in the DEM model is judged by adopting a ray method, each fractured rock mass particle area is divided according to each CFD grid area, and the particle size and the bonding attribute of the fractured rock mass particles in the corresponding divided area are obtained; calculating an equivalent particle size and an equivalent permeability coefficient of each region; calculating the p