上述研究仅仅是在单层的容积或者管道内进行，但是对于多层结构的容积或者多

The above studies are only carried out in the volume of a single layer or in the pipeline, but there is basically no research on the particle size distribution and volume concentration of the suspension in the volume of the multi-layer structure or the multi-layer pipeline. The research object of this paper is the mineral fluid in the multi-layer deep-sea flexible pipe. Using the BLBL model, the suspension in the multi-layer structure is simulated by COMSOL Multiphysics, and it is verified that the BLBL model is also suitable for the volume concentration monitoring of the mineral fluid in the multi-layer structure. .

The above research is only carried out in the volume of single layer or pipeline, but there is basically no research on the volume of multi-layer structure or the particle size distribution and volume concentration of suspension in multi-layer pipeline. The research object of this paper is the mineral fluid in multi-layer deep-sea flexible pipe. The suspension in multi-layer structure is simulated by using blbl model and COMSOL multiphysics. It is verified that blbl model is also suitable for the volume concentration monitoring of mineral fluid in multi-layer structure.

The above research is only carried out in the volume of single layer or pipeline, but there is little research on the volume of multi-layer structure or the particle size distribution and volume concentration of suspension in multi-layer pipeline. The research object of this paper is mineral fluid in multi-layer deep-sea flexible pipe. Using BLBL model, the suspension in multi-layer structure is simulated by COMSOL Multiphysics, which proves that BLBL model is also suitable for monitoring the volume concentration of mineral fluid in multi-layer structure.