中南大学学报（自然科学版）2017，Vol.48Issue(5)：1308-1315,8.DOI:10.11817/j.issn.1672-7207.2017.05.025
基于CFD−DPM耦合法新型差压密度计中水泥浆液流动特性分析
Flow characteristic analysis of grout in new type differential pressure densimeter based on CFD?DPM coupling method
摘要
Abstract
To reveal the velocity and particle distribution regularity in the measuring cylinder, a coupling method of continuous and discrete phase model was established based on Euler?Lagrange method. The velocity distribution was solved by the CFD continuous model and the solid?phase particle trajectory was solved by DPM discrete model, and the velocity and particle field in the new type differential pressure densimeter were simulated. The results show that, during the measurement of the new type densimeter, the flow velocity of low concentration grouts with water-cement ratio of 5:1?3:1 has a uniform distribution along the center line and transverse direction of the cylinder, while high concentration grouts with water-cement ratio of 3:1?0.5:1 has a uniform distribution along the center line but gradient distribution along the transverse direction of the cylinder, and so normal concentration grouts show laminar flowing state in the core measuring area of the cylinder. Solid particle is distributed evenly over the cylinder and there is no special local accumulation or vacuum area for grouts with water–cement ratio of 0.5:1?5:1. Double coupling model solves the simulate distortion of tradition single model and provides specific evidence for the development of new type differential pressure densimeter.关键词
CFD−DPM/水泥浆液/流动特性/水灰比/固液两相流Key words
CFD−DPM/cement grout/flow characteristic/water−cement ratio/solid liquid two phase flow分类
信息技术与安全科学引用本文复制引用
李静雅,徐力生,徐蒙..基于CFD−DPM耦合法新型差压密度计中水泥浆液流动特性分析[J].中南大学学报（自然科学版）,2017,48(5):1308-1315,8.基金项目
国家自然科学基金资助项目(51208514) （51208514）
国家中小企业创新基金资助项目(12C26214304879) （12C26214304879）
中南大学中央高校基本科研业务费专项资金资助项目(2011QNZT007) (Project(51208514) supported by the National Natural Science Foundation of China （2011QNZT007）
Project(12C26214304879) supported by the National Small and Medium Enterprises Technology Innovation Foundation （12C26214304879）
Project(2011QNZT007) supported by the Scientific Research Special Foundation of Central South University) （2011QNZT007）
