Lei Xu , Xingchen Chen , Xiukai Wu , Jingyin Liang , Shiyi Bao , Qijun Zheng
{"title":"对稀释气固流诱导的弯头侵蚀进行粗粒度 CFD-DEM 模拟:多层次研究","authors":"Lei Xu , Xingchen Chen , Xiukai Wu , Jingyin Liang , Shiyi Bao , Qijun Zheng","doi":"10.1016/j.powtec.2024.119916","DOIUrl":null,"url":null,"abstract":"<div><p>A coarse-grained (CG) approach, which can significantly facilitate large-scale modelling of particle systems, was proposed for predicting the surface erosion in an elbow pipe induced by dilute gas-particle flow. In the approach, the particle sizes and forces such as gas-particle interactions are scaled in terms of a CG ratio. A particle-level Shear Impact Energy Model (SIEM) is applied to calculate the erosion rate. The accuracy of the CG approach is evaluated extensively for different particle concentrations and tube diameters. The CG approach is found to work satisfactorily when suitable fluctuation velocities are used at the inlet of the tube. The reason is that the fluctuation velocities keep the kinetic energy of particles conservative within the elbow. An equation was provided for determining the magnitude of the fluctuation velocity in CG modelling of the elbow pipe and its universality is tested under different coarse-grained ratios and particle concentrations.</p></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.5000,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Coarse-grained CFD-DEM simulation of elbow erosion induced by dilute gas-solid flow: A multi-level study\",\"authors\":\"Lei Xu , Xingchen Chen , Xiukai Wu , Jingyin Liang , Shiyi Bao , Qijun Zheng\",\"doi\":\"10.1016/j.powtec.2024.119916\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A coarse-grained (CG) approach, which can significantly facilitate large-scale modelling of particle systems, was proposed for predicting the surface erosion in an elbow pipe induced by dilute gas-particle flow. In the approach, the particle sizes and forces such as gas-particle interactions are scaled in terms of a CG ratio. A particle-level Shear Impact Energy Model (SIEM) is applied to calculate the erosion rate. The accuracy of the CG approach is evaluated extensively for different particle concentrations and tube diameters. The CG approach is found to work satisfactorily when suitable fluctuation velocities are used at the inlet of the tube. The reason is that the fluctuation velocities keep the kinetic energy of particles conservative within the elbow. An equation was provided for determining the magnitude of the fluctuation velocity in CG modelling of the elbow pipe and its universality is tested under different coarse-grained ratios and particle concentrations.</p></div>\",\"PeriodicalId\":407,\"journal\":{\"name\":\"Powder Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.5000,\"publicationDate\":\"2024-05-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Powder Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S003259102400559X\",\"RegionNum\":2,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Technology","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S003259102400559X","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Coarse-grained CFD-DEM simulation of elbow erosion induced by dilute gas-solid flow: A multi-level study
A coarse-grained (CG) approach, which can significantly facilitate large-scale modelling of particle systems, was proposed for predicting the surface erosion in an elbow pipe induced by dilute gas-particle flow. In the approach, the particle sizes and forces such as gas-particle interactions are scaled in terms of a CG ratio. A particle-level Shear Impact Energy Model (SIEM) is applied to calculate the erosion rate. The accuracy of the CG approach is evaluated extensively for different particle concentrations and tube diameters. The CG approach is found to work satisfactorily when suitable fluctuation velocities are used at the inlet of the tube. The reason is that the fluctuation velocities keep the kinetic energy of particles conservative within the elbow. An equation was provided for determining the magnitude of the fluctuation velocity in CG modelling of the elbow pipe and its universality is tested under different coarse-grained ratios and particle concentrations.
期刊介绍:
Powder Technology is an International Journal on the Science and Technology of Wet and Dry Particulate Systems. Powder Technology publishes papers on all aspects of the formation of particles and their characterisation and on the study of systems containing particulate solids. No limitation is imposed on the size of the particles, which may range from nanometre scale, as in pigments or aerosols, to that of mined or quarried materials. The following list of topics is not intended to be comprehensive, but rather to indicate typical subjects which fall within the scope of the journal's interests:
Formation and synthesis of particles by precipitation and other methods.
Modification of particles by agglomeration, coating, comminution and attrition.
Characterisation of the size, shape, surface area, pore structure and strength of particles and agglomerates (including the origins and effects of inter particle forces).
Packing, failure, flow and permeability of assemblies of particles.
Particle-particle interactions and suspension rheology.
Handling and processing operations such as slurry flow, fluidization, pneumatic conveying.
Interactions between particles and their environment, including delivery of particulate products to the body.
Applications of particle technology in production of pharmaceuticals, chemicals, foods, pigments, structural, and functional materials and in environmental and energy related matters.
For materials-oriented contributions we are looking for articles revealing the effect of particle/powder characteristics (size, morphology and composition, in that order) on material performance or functionality and, ideally, comparison to any industrial standard.