Bowen Liu , Qing Wang , Zongyan Zhou , Ruiping Zou
{"title":"挡板对内加热转鼓内混合和传热特性的影响","authors":"Bowen Liu , Qing Wang , Zongyan Zhou , Ruiping Zou","doi":"10.1016/j.powtec.2022.117129","DOIUrl":null,"url":null,"abstract":"<div><p><span><span>Baffles can effectively improve the mixing and heat transfer in internally heated rotating drums. To explore the performance of baffles, discrete element method (DEM) is employed in this work, and the influence of the placement and length of baffles on the mixing and heat transfer in an internally heated drum is investigated. The simulation results show that a central cross baffle promotes the mixing and heat transfer significantly, and the optimal length varies with </span>material properties, for example, at the length-to-diameter ratio L/D = 0.4 for monodispersed glass particles, 0.6–0.7 for binary glass-steel mixtures. The peripheral baffle generally weakens the mixing and heat transfer performance, and effects only for a sufficiently long peripheral baffle at the length-to-radius ratio L/</span><em>R</em><span> = 0.9. Baffles promote the heat transfer process and do not change the thermal contribution of heat transfer paths.</span></p></div>","PeriodicalId":407,"journal":{"name":"Powder Technology","volume":null,"pages":null},"PeriodicalIF":4.5000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Influence of baffles on mixing and heat transfer characteristics in an internally heated rotating drum\",\"authors\":\"Bowen Liu , Qing Wang , Zongyan Zhou , Ruiping Zou\",\"doi\":\"10.1016/j.powtec.2022.117129\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p><span><span>Baffles can effectively improve the mixing and heat transfer in internally heated rotating drums. To explore the performance of baffles, discrete element method (DEM) is employed in this work, and the influence of the placement and length of baffles on the mixing and heat transfer in an internally heated drum is investigated. The simulation results show that a central cross baffle promotes the mixing and heat transfer significantly, and the optimal length varies with </span>material properties, for example, at the length-to-diameter ratio L/D = 0.4 for monodispersed glass particles, 0.6–0.7 for binary glass-steel mixtures. The peripheral baffle generally weakens the mixing and heat transfer performance, and effects only for a sufficiently long peripheral baffle at the length-to-radius ratio L/</span><em>R</em><span> = 0.9. Baffles promote the heat transfer process and do not change the thermal contribution of heat transfer paths.</span></p></div>\",\"PeriodicalId\":407,\"journal\":{\"name\":\"Powder Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":4.5000,\"publicationDate\":\"2022-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Powder Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0032591022000237\",\"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/S0032591022000237","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}
Influence of baffles on mixing and heat transfer characteristics in an internally heated rotating drum
Baffles can effectively improve the mixing and heat transfer in internally heated rotating drums. To explore the performance of baffles, discrete element method (DEM) is employed in this work, and the influence of the placement and length of baffles on the mixing and heat transfer in an internally heated drum is investigated. The simulation results show that a central cross baffle promotes the mixing and heat transfer significantly, and the optimal length varies with material properties, for example, at the length-to-diameter ratio L/D = 0.4 for monodispersed glass particles, 0.6–0.7 for binary glass-steel mixtures. The peripheral baffle generally weakens the mixing and heat transfer performance, and effects only for a sufficiently long peripheral baffle at the length-to-radius ratio L/R = 0.9. Baffles promote the heat transfer process and do not change the thermal contribution of heat transfer paths.
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.