{"title":"VOF-DEM numerical study of mesoscale bubble dynamics in the gas-liquid-solid three-phase flow system","authors":"Hongshi Yu, Shiliang Yang, Hua Wang","doi":"10.1002/aic.18614","DOIUrl":null,"url":null,"abstract":"<p>Mesoscale bubble dynamics play a critical role in governing the overall performance of gas-liquid-solid systems. In this study, the volume of fluid method coupled with a discrete element method is utilized to scrutinize the mesoscale bubble dynamics within a gas-liquid-solid system featuring a dense particle bed. The results reveal that the squeezing effect of the particle bed induces a bubble pairs regime, which causes the bubble collision, coalescence and breakup, thereby generating daughter bubbles. Additionally, the combined influence of large size, flattened shape, off-center collisions and the exists of particles facilitate bubble wakes to transform from closed into asymmetrical open patterns, further causing particles released from bubble wakes. Finally, the high-speed region is predominantly confined to the bubble wake area, resulting in a diminished overall stirring capability compared with two-phase system. The insights obtained from this study shed valuable light on bubble behaviors within gas-liquid-solid systems, offering implications for further study in this field.</p>","PeriodicalId":120,"journal":{"name":"AIChE Journal","volume":"70 12","pages":""},"PeriodicalIF":3.5000,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"AIChE Journal","FirstCategoryId":"5","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/aic.18614","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Mesoscale bubble dynamics play a critical role in governing the overall performance of gas-liquid-solid systems. In this study, the volume of fluid method coupled with a discrete element method is utilized to scrutinize the mesoscale bubble dynamics within a gas-liquid-solid system featuring a dense particle bed. The results reveal that the squeezing effect of the particle bed induces a bubble pairs regime, which causes the bubble collision, coalescence and breakup, thereby generating daughter bubbles. Additionally, the combined influence of large size, flattened shape, off-center collisions and the exists of particles facilitate bubble wakes to transform from closed into asymmetrical open patterns, further causing particles released from bubble wakes. Finally, the high-speed region is predominantly confined to the bubble wake area, resulting in a diminished overall stirring capability compared with two-phase system. The insights obtained from this study shed valuable light on bubble behaviors within gas-liquid-solid systems, offering implications for further study in this field.
期刊介绍：
The AIChE Journal is the premier research monthly in chemical engineering and related fields. This peer-reviewed and broad-based journal reports on the most important and latest technological advances in core areas of chemical engineering as well as in other relevant engineering disciplines. To keep abreast with the progressive outlook of the profession, the Journal has been expanding the scope of its editorial contents to include such fast developing areas as biotechnology, electrochemical engineering, and environmental engineering.
The AIChE Journal is indeed the global communications vehicle for the world-renowned researchers to exchange top-notch research findings with one another. Subscribing to the AIChE Journal is like having immediate access to nine topical journals in the field.
Articles are categorized according to the following topical areas:
Biomolecular Engineering, Bioengineering, Biochemicals, Biofuels, and Food
Inorganic Materials: Synthesis and Processing
Particle Technology and Fluidization
Process Systems Engineering
Reaction Engineering, Kinetics and Catalysis
Separations: Materials, Devices and Processes
Soft Materials: Synthesis, Processing and Products
Thermodynamics and Molecular-Scale Phenomena
Transport Phenomena and Fluid Mechanics.
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