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Data-driven identification of coherent structures in gas-solid system using proper orthogonal decomposition and dynamic mode decomposition

文献类型：期刊论文

作者Li, Dandan1,3; Zhao, Bidan1,2,3; Wang, Junwu1,2,3
刊名PHYSICS OF FLUIDS
出版日期2023
卷号35期号:1页码:14
ISSN号1070-6631
DOI10.1063/5.0131112
英文摘要Spatiotemporal coherent structures are critical in quantifying the hydrodynamics of dense gas-solid flows. In this study, two data-driven methods, proper orthogonal decomposition (POD) and dynamic mode decomposition (DMD), are applied to identify and characterize the dominant spatiotemporal coherent structures in a bubbling fluidized bed. It is found that (i) with the same number of modes (or coherent structures), POD captures more defined energy than DMD; (ii) the main coherent structure of POD is symmetric and confirms the existence of bubble-emulsion two-phase structure; (iii) the coherent structures with a frequency of 0 Hz in DMD analysis can construct the mean flow field more reasonably than POD; and (iv) POD reconstructs the transient flow fields more accurately with the same number of modes. This study offers insights into the coherent structures in gas-solid systems.
WOS关键词MAGNETIC-RESONANCE MEASUREMENTS ; DIRECT NUMERICAL-SIMULATION ; DISCRETE ELEMENT MODEL ; FLUIDIZED-BED ; SPATIOTEMPORAL PATTERNS ; FLOW STRUCTURES
资助项目National Natural Science Foundation of China[11988102] ; National Natural Science Foundation of China[21978295] ; Innovation Academy for Green Manufacture ; Chinese Academy of Sciences[IAGM2022D02] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA29040200]
WOS研究方向Mechanics ; Physics
语种英语
出版者AIP Publishing
WOS记录号WOS:000912154000008
资助机构National Natural Science Foundation of China ; Innovation Academy for Green Manufacture ; Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.ipe.ac.cn/handle/122111/56771]  
通讯作者Wang, Junwu
作者单位1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China
3.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Li, Dandan,Zhao, Bidan,Wang, Junwu. Data-driven identification of coherent structures in gas-solid system using proper orthogonal decomposition and dynamic mode decomposition[J]. PHYSICS OF FLUIDS,2023,35(1):14.
APA Li, Dandan,Zhao, Bidan,&Wang, Junwu.(2023).Data-driven identification of coherent structures in gas-solid system using proper orthogonal decomposition and dynamic mode decomposition.PHYSICS OF FLUIDS,35(1),14.
MLA Li, Dandan,et al."Data-driven identification of coherent structures in gas-solid system using proper orthogonal decomposition and dynamic mode decomposition".PHYSICS OF FLUIDS 35.1(2023):14.

入库方式： OAI收割

来源：过程工程研究所

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