首页|Study on hydrodynamic diffusion law of the swelling particle slurry in karst pipeline

Study on hydrodynamic diffusion law of the swelling particle slurry in karst pipeline

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
The swelling particle grouting material has demonstrated remarkable plugging effectiveness in high-pressure and large-flow burst water within karst pipelines.Currently,current research on the rheolog-ical model,flow computation theory,and plugging mechanism of this material is lacking.The conven-tional grouting slurry diffusion process,using the liquid-liquid two-phase flow method,fails to accurately simulate high solubility slurry and particle swelling.To address these limitations,this study established a precise constitutive model to describe the swelling particle slurry diffusion process in dynamic water.Additionally,a coupling calculation method was proposed to analyze the spatiotemporal heterogeneity of viscosity during slurry diffusion by considering the migration of slurry and the changes in viscosity.To investigate the interaction between particle swelling and flow field changes,a Compu-tational Fluid Dynamics-Discrete Element Method(CFD-DEM)coupling model was developed for the diffusion of swelling particle slurry.It is demonstrated that slurry viscosity increases exponentially within the diffusion front as the particle swelling rate rises,and the drag force exhibits an intriguing behavior of initially increasing and then decreasing as the slurry flows through the pipeline.Further-more,the CFD-DEM coupling model proved to be more accurate in describing viscosity distribution and diffusion distance compared to the finite element solution.The primary objective of this paper is to reveal the plugging mechanism and provide theoretical support for the engineering application of the swelling particle grouting material.

Karst pipelineSwelling particle grouting materialDynamic water diffusionSpatiotemporal variation of viscosityCFD-DEM coupling model

Bingchuan Cheng、Haibo Li、Guangming Pan、Runhuai Deng、Yu'an Gong、Shujun Xu、Kun Zhou、Zhuo Zheng

展开 >

School of Civil Engineering,Geotechnical and Structural Engineering Research Center,Shandong University,Jinan,250061,China

The Fourth Prospecting of Shandong Coal Geology Bureau,Weifang,261000,China

China Railway 14th Bureau Group Corporation Limited,Jinan,250101,China

School of Traffic Engineering,Shandong Jianzhu University,Fengming Road,Lingang Development Zone,Jinan,250101,China

展开 >

National Natural Science Foundation of China for the Young Scientists Fund,China国家重点研发计划

52109126202103AA080016

2024

10.1016/j.partic.2023.08.010

颗粒学报(英文版)
中国颗粒学会　中国科学院过程工程研究所

颗粒学报(英文版)

CSTPCD
影响因子：0.632
ISSN：1674-2001
年,卷(期)：2024.87(4)
  • 54