首页|考虑黏度时空分布的动水扩散数值模拟与试验研究

考虑黏度时空分布的动水扩散数值模拟与试验研究

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为研究新型岩溶管道注浆材料(WIS新型注浆材料)在动水条件下的扩散规律,从注浆材料自身的物理化学性质出发,通过流变性能试验研究WIS新型注浆材料的浆液流型,建立基于黏度时空分布的函数方程,阐述混合物浆液在管道内运移的动态演化过程;借助COMSOL Multiphysics数值模拟软件计算在不同注浆速率、管道直径、浆液粒径参数下浆液扩散形态随时间的变化特征,对比分析模拟试验中管道内速度场的演化规律.结果表明:WIS新型注浆材料为黏度时空变化型浆液;黏度时空分布状态下浆液的扩散运移过程中质点黏度不断增大,每相邻两个浆液质点的黏度随注浆扩散均各不相同,浆液质点的间距不断减小,扩散距离也不断减小;数值模拟计算结果显示:WIS新型注浆材料的扩散过程具有明显的非对称性,顺水扩散距离均随注浆扩散时间增大而增大,扩散距离与注浆速率成负相关关系,与管道直径、浆液粒径成正相关关系;注浆口下游管路流速与注浆扩散时间存在显著的负相关关系;数值模拟计算结果与模拟试验结果的速度场演化规律具有一致性,同时验证了在误差允许的范围内数值模拟规律的合理性.研究成果可为岩溶管道突涌水环境下的注浆参数设计提供可靠的理论依据及参考价值.
Numerical simulation and experimental study of hydrodynamic diffusion considering the spatial and temporal distribution of viscosity
In order to investigate the diffusion behavior of a novel Karst pipe grouting material(WIS new grouting material)under flowing water conditions,this study examined the flow pattern of WIS new grouting material through rheological experiments based on its inherent physical and chemical properties.Furthermore,it established a constitutive relationship by considering the temporal and spatial distribution of viscosity,thereby elucidating the dynamic evolution process of the mixture grout within the pipeline.The characteristics of slurry diffusion morphology changed over time under different parameters such as grouting rate,pipe diameter,and slurry particle size were calculated using COMSOL Multiphysics numerical simulation software.Furthermore,the simulation test compared and analyzed the evolution law of the velocity field in the pipe.The findings indicated that the new WIS grouting material could be classified as a slurry with viscosity exhibiting time-space variation;The viscosity of grout particles increased progressively during the process of diffusion migration,exhibiting a temporal and spatial distribution pattern.Each adjacent grout particle possessed distinct viscosity values as the grouting diffusion took place.The interparticle distance underwent continuous reduction,accompanied by a simultaneous decrease in the diffusion distance.The numerical simulation results demonstrated a distinct asymmetry in the diffusion process of WIS grouting material,with an increasing diffusion distance along the water as grouting diffusion time increased.The diffusion distance exhibited a negative correlation with the grouting rate and a positive correlation with both pipe diameter and slurry size.There was a significant negative correlation between the flow rate of the downstream pipe and the grouting diffusion time.The results of numerical simulation were in accordance with those of the simulation test,and the validity of the simulation test was verified within the acceptable range of error.The research findings could provide a dependable theoretical foundation and serve as a valuable reference for designing grouting parameters in Karst pipeline water outburst environments.

WIS new grouting materialrunning water groutingthe spatiotemporal variation of viscosityslurry diffusionnumerical simulation

王振军、刘人太、张庆松、惠冰、陈孟军、马晨阳、李鸿钊

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山东省交通科学研究院,山东 济南 250104

山东大学岩土与地下工程研究院,山东 济南 250061

WIS新型注浆材料 动水注浆 黏度时空变化 浆液扩散 数值仿真

国家自然科学基金资助项目国家自然科学基金资助项目国家重点研发计划资助项目山东省交通运输科技计划资助项目济南市新高校20条资助项目

52021005523783522022YFB2302204-05-42023B46202228071

2024

10.6040/j.issn.1672-3961.0.2024.041

山东大学学报(工学版)
山东大学

山东大学学报(工学版)

CSTPCD北大核心
影响因子：0.634
ISSN：1672-3961
年,卷(期)：2024.54(5)