文献类型：期刊文献

英文题名：An improved semi-resolved computational fluid dynamics-discrete element method for simulating liquid-solid systems with wide particle size distributions

作者：Wen, Xiaojiang Zheng, Lingna Zhao, Xun Liu, Yingke Kang, Jianhong Ye, Guoqing Wang, Fengchao Yuan, Man Jiang, Mingjun

第一作者：Wen, Xiaojiang

通信作者：Liu, YK[1];Kang, JH[2]

机构：[1]China Univ Min & Technol, Jiangsu Key Lab Coal based Greenhouse Gas Control, Xuzhou 221008, Jiangsu, Peoples R China;[2]China Univ Min & Technol, Sch Safety Engn, Xuzhou 221116, Jiangsu, Peoples R China;[3]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Guizhou, Peoples R China;[4]China Univ Min & Technol, Sch Low Carbon Energy & Power Engn, Xuzhou 221116, Jiangsu, Peoples R China

第一机构：China Univ Min & Technol, Jiangsu Key Lab Coal based Greenhouse Gas Control, Xuzhou 221008, Jiangsu, Peoples R China

通信机构：corresponding author), China Univ Min & Technol, Jiangsu Key Lab Coal based Greenhouse Gas Control, Xuzhou 221008, Jiangsu, Peoples R China;corresponding author), China Univ Min & Technol, Sch Safety Engn, Xuzhou 221116, Jiangsu, Peoples R China.

年份：2024

卷号：36

期号：3

外文期刊名：PHYSICS OF FLUIDS

收录：;EI(收录号：20241315803556);Scopus(收录号：2-s2.0-85188536621);WOS:【SCI-EXPANDED(收录号:WOS:001186633100008)】；

基金：This work was supported by the Science and Technology Major Project of Shanxi Province, China (No. 20201102001), the Major Independent Research Project of Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization (No. 2020ZDZZ02D), the National Natural Science Foundation of China (No. 52104150), the Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. KYCX22_2660), and the Guizhou Provincial Science and Technology Projects (Qianke Support [2023] General 360).

语种：英文

外文关键词：Fluidization - Mining - Momentum - Numerical methods - Particle size - Size distribution - Two phase flow - Volume fraction

摘要：Vertical hydraulic transport of particles with wide particle size distributions is a crucial process for coal physical fluidized mining. In the present study, an improved semi-resolved computational fluid dynamics (CFD)-discrete element method was developed to simulate particle flows with wide particle size distributions. In this model, the CFD cells allocated to the particle volume and the momentum source term were defined as the dependent domain and the influential domain, respectively. On this basis, the two-way domain expansion method and the one-way domain expansion method were adopted for the liquid-solid simulation of coarse and fine particles, respectively. The dependent domain expansion coefficient and the influential domain expansion coefficient were proposed to determine the spatial range of the dependent domain and influential domain for the coarse particles, and the optimal modeling strategy for the dependent domain and influential domain expansion coefficient for the coarse particles was determined. Furthermore, a volume expansion method and a momentum source expansion method were proposed for calculating the solid volume fraction of the dependent domain and the source term of the influential domain for the coarse particles. Furthermore, the sample point method was adopted to obtain the solid volume fraction in the dependent domain for the fine particles, and the momentum source term was only updated to the particle-located cell. Subsequently, single-particle settling and binary-particle fluidizing numerical experiments were used to verify the calculation accuracy of the model. The investigation can provide a new method for numerical simulation of liquid-solid flow with wide particle size distributions.