Supersonic and near-equilibrium gas-driven granular flow

doi:10.1063/5.0030707

	Supersonic and near-equilibrium gas-driven granular flow
	Wang, Junwu 1,2,3; Zhao, Peng 1,3; Zhao, Bidan 1,3
刊名	PHYSICS OF FLUIDS
	2020-11-01
卷号	32 期号:11 页码:8
ISSN号	1070-6631
DOI	10.1063/5.0030707
英文摘要	Studies have found the surprising ability of hydrodynamic theory, which is based on the validity of the local thermodynamic equilibrium postulate, to capture the main features of shock waves in supersonic granular gases. However, its underlying mechanism remains unclear. To explore the factors underpinning the relationship between hydrodynamic theory and the behavior of shock waves in granular gases, a discrete particle method was used to systematically study gas-driven granular flow in gas-solid fluidized beds. It was shown that the flow of granular gases is typically supersonic, consistent with the previous understanding of shear granular flow. However, the Knudsen numbers and entropy criterion, which are used to quantify the distance from the local thermodynamic equilibrium state, were generally small. This finding explains why hydrodynamic theory can describe the behavior of supersonic granular flows; that is, shock waves in granular gases are locally near-equilibrium even though they are supersonic. This study also indicates that shock waves in ordinary gases and granular gases are fundamentally different.
资助项目	National Natural Science Foundation of China[11988102] ; National Natural Science Foundation of China[21978295] ; National Natural Science Foundation of China[91834303] ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM-2019-A13] ; Key Research Program of Frontier Science, Chinese Academy of Sciences[QYZDJ-SSW-JSC029] ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program from the Chinese Academy of Sciences[XDA21030700]
WOS关键词	DYNAMIC MULTISCALE METHOD ; SOLID FLOW ; CLUSTERING INSTABILITY ; 2-FLUID MODEL ; SIMULATION ; VALIDITY ; WAVES ; BED
WOS研究方向	Mechanics ; Physics
语种	英语
出版者	AMER INST PHYSICS
WOS记录号	WOS:000589658900002
资助机构	National Natural Science Foundation of China ; Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; Key Research Program of Frontier Science, Chinese Academy of Sciences ; Transformational Technologies for Clean Energy and Demonstration Strategic Priority Research Program from the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/42612]
专题	中国科学院过程工程研究所
通讯作者	Wang, Junwu
作者单位	1.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, POB 353, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Wang, Junwu,Zhao, Peng,Zhao, Bidan. Supersonic and near-equilibrium gas-driven granular flow[J]. PHYSICS OF FLUIDS,2020,32(11):8.
APA	Wang, Junwu,Zhao, Peng,&Zhao, Bidan.(2020).Supersonic and near-equilibrium gas-driven granular flow.PHYSICS OF FLUIDS,32(11),8.
MLA	Wang, Junwu,et al."Supersonic and near-equilibrium gas-driven granular flow".PHYSICS OF FLUIDS 32.11(2020):8.