文献类型：期刊文献

英文题名：A method for measuring the critical pore diameter of a homogeneous microchannel separator based on image analysis and a simulation comparison of CFD-DEM

作者：Xu, Dingliang[1];Yuan, Cong[2];Dai, Li[1];Zeng, Lin[1];Li, Long[1];Guan, Xiangwei[3];Lv, Wenjie[2];Tian, Chengcheng[2,4];Wang, Hualin[2]

机构：[1]Chongqing Univ Technol, Coll Chem & Chem Engn, Chongqing 400054, Peoples R China;[2]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, Shanghai 200237, Peoples R China;[3]China Kunlun Contracting & Engn Corp CKCEC, Beijing 100044, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2025

卷号：360

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20245017499073);WOS:【SCI-EXPANDED(收录号:WOS:001375042500001)】；

基金：This work is supported by the Scientific Research Foundation of Chongqing University of Technology, Science and Technology Research Program of Chongqing Municipal Education Commission (KJQN202201124) , Chongqing Postdoctoral Science Foundation (CSTB2023NSCQ-BHX0146) , CNPC Engineering Co., Ltd. coordinates scientific research projects (2022ZYGC-06-02) and Innovation Program of Shanghai Municipal Education Commission (2023ZKZD41) .

语种：英文

外文关键词：Homogeneous microchannel separator; Feret diameter; Unresolved CFD-DEM method; Deep bed filtration

摘要：Fine particles being captured or escaping from particle beds (microchannel separator) is a widespread phenomenon, with the size and distribution of pores (microchannel) significantly affecting these phenomena. However, due to the complexity of the pore structure, accurately measuring and validating it poses challenges. This paper introduces a new method to calculate the critical pore diameter of homogeneous microchannel separators (three types of homogeneous separation media with particle sizes of 0.8 mm, 1.0 mm and 1.2 mm). Initially, particle bed units with a thickness twice the diameter of the separation media were captured from multiple orthogonal projection directions to obtain high-resolution images of the pore structure. Then, the Feret diameter distribution of the pores were analyzed to quantify pore size and distribution. Next, unresolved CFDDEM method was used to simulate the capture of fine particles to optimize and supplement the results. The results show that the average Feret diameter of the pores differs by only 0.85 mu m, 1.70 mu m, and 2.46 mu m from the simulation results, and it is noted that the critical pore diameter is approximately 0.153 times that of the separation media diameter, the numerical difference from the critical dimension ratio is only 0.0017. Additionally, when the diameter of the fine particles is 0.155 to 0.165 times the diameter of the separation media, the homogeneous microchannel separator exhibits the highest efficiency during the deep bed filtration process. The study also examines the separation of homogeneous fine particles at varying inlet liquid flow rates, which can offer theoretical guidance for analyzing the porosity of microchannel separators and the efficient removal of solid pollutants, thus contributing novel ideas to deep bed filtration research.