{"title":"利用解析的 CFD-DEM 耦合模型深入了解气体对孔隙堵塞的影响","authors":"","doi":"10.1016/j.compgeo.2024.106866","DOIUrl":null,"url":null,"abstract":"<div><div>Pore clogging phenomena are commonly encountered in porous media and have been extensively investigated. However, with the increasing prominence of fields like hydrate extraction and carbon dioxide (CO<sub>2</sub>) sequestration, which involve gas–liquid two-phase flow, the effect of gas on pore clogging remains largely unexplored. This study employed a coupled resolved computational fluid dynamics and discrete element method (CFD-DEM) in conjunction with the volume of fluid (VOF) method to simulate gas–liquid two-phase flow. In addition, scanned real particles and a truncated-cone pore are employed to simulate pore clogging process under fluid flow. The results indicate that the presence of gas intensifies the turbulence within the fluid field. Additionally, the interaction among gas, fluid, and particles increases the variability of the drag forces acting on the particles. These two factors lead to a decrease in particle pile stability and reduce the possibility of pore clogging. Moreover, the parameters study shows that with the increase of gas fraction, the fluctuation of particle drag force increases and the velocity of particles passing through pore increases. With the increase of constriction diameter, the velocity of particles passing through pore is accelerated, and the influence of gas is reduced.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"An insight into the effect of gas on pore clogging using a resolved CFD-DEM coupling model\",\"authors\":\"\",\"doi\":\"10.1016/j.compgeo.2024.106866\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>Pore clogging phenomena are commonly encountered in porous media and have been extensively investigated. However, with the increasing prominence of fields like hydrate extraction and carbon dioxide (CO<sub>2</sub>) sequestration, which involve gas–liquid two-phase flow, the effect of gas on pore clogging remains largely unexplored. This study employed a coupled resolved computational fluid dynamics and discrete element method (CFD-DEM) in conjunction with the volume of fluid (VOF) method to simulate gas–liquid two-phase flow. In addition, scanned real particles and a truncated-cone pore are employed to simulate pore clogging process under fluid flow. The results indicate that the presence of gas intensifies the turbulence within the fluid field. Additionally, the interaction among gas, fluid, and particles increases the variability of the drag forces acting on the particles. These two factors lead to a decrease in particle pile stability and reduce the possibility of pore clogging. Moreover, the parameters study shows that with the increase of gas fraction, the fluctuation of particle drag force increases and the velocity of particles passing through pore increases. With the increase of constriction diameter, the velocity of particles passing through pore is accelerated, and the influence of gas is reduced.</div></div>\",\"PeriodicalId\":55217,\"journal\":{\"name\":\"Computers and Geotechnics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.3000,\"publicationDate\":\"2024-10-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computers and Geotechnics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0266352X2400805X\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computers and Geotechnics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0266352X2400805X","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
An insight into the effect of gas on pore clogging using a resolved CFD-DEM coupling model
Pore clogging phenomena are commonly encountered in porous media and have been extensively investigated. However, with the increasing prominence of fields like hydrate extraction and carbon dioxide (CO2) sequestration, which involve gas–liquid two-phase flow, the effect of gas on pore clogging remains largely unexplored. This study employed a coupled resolved computational fluid dynamics and discrete element method (CFD-DEM) in conjunction with the volume of fluid (VOF) method to simulate gas–liquid two-phase flow. In addition, scanned real particles and a truncated-cone pore are employed to simulate pore clogging process under fluid flow. The results indicate that the presence of gas intensifies the turbulence within the fluid field. Additionally, the interaction among gas, fluid, and particles increases the variability of the drag forces acting on the particles. These two factors lead to a decrease in particle pile stability and reduce the possibility of pore clogging. Moreover, the parameters study shows that with the increase of gas fraction, the fluctuation of particle drag force increases and the velocity of particles passing through pore increases. With the increase of constriction diameter, the velocity of particles passing through pore is accelerated, and the influence of gas is reduced.
期刊介绍:
The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.