CFD-DEM seepage erosion damage simulation method considering particle shape

Abstract

The invention discloses a CFD-DEM seepage erosion damage simulation method considering particle shapes, which comprises the following steps: determining particle shape parameters of a sample in a DEM module, and calculating the particle size of non-spherical particles by using an equivalent spherical diameter method; configuring at least two preset spaces in the DEM module, and generating samples in the preset spaces by adopting a layered compaction method, wherein a solid plate is adopted between every two adjacent preset spaces; establishing a fluid model in the CFD module; carrying out bidirectional coupling on the coupling module in the DEM module and the CFD module, replacing solid plates at the two ends of a sample with pore plates, and simulating the process of seepage erosion damage through coupling calculation. A sample of the non-spherical particles is established through discrete elements, bidirectional coupling calculation is carried out on the sample and a CFD module, the interaction mechanism of the particles and fluid can be further researched from macro and micro angles, the influence of the particle shape on seepage erosion damage is considered, the accuracy is higher, and the method is more suitable for engineering practice.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a method for simulating seepage erosion damage with CFD-DEM considering particle shape. Background technique [0002] Seepage erosion damage refers to the transportation or loss of fine particles in the pores formed by coarse particles under the action of fluid. This is a complex process of fluid-particle interaction, which will affect the durability and stability of geotechnical structures, and is one of the most common causes of damage to dams and underground pipelines, so its related research is of great significance in the field of hydraulic geotechnical engineering . [0003] At present, the methods for simulating seepage erosion mainly include finite element method and CFD-DEM method. Although the finite element method has advantages in simulating the deformation of continuum at the macro level, it is difficult to capture the changes in the microscopic con...

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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a CFD-DEM method for simulating seepage and erosion damage considering the particle shape in view of the above-mentioned defects of the prior art, aiming to solve the problem that the effect of the particle shape on the fluid-solid coupling is not considered in the prior art The impact of the results, causing the problem of lower accuracy

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