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MECHANICS OF ARCHING IN A MOVING-BED STANDPIPE WITH INTERSTITIAL GAS-FLOW
Alternative TitlePowder Technol.
LI, HZ
1994-02-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume78Issue:2Pages:179-187
AbstractThe mechanism of arching in a moving-bed standpipe with interstitial gas flow has been studied using the theories of particulate media mechanics and non-fluidized gas-solids flow. In order to determine the critical arching radius, which marks the change from arching to flow, a situation where all the powder is in a critical passive state of stress is considered, and the powder in the standpipe is assumed to be composed of arched layers. The differential equations of force balance for a elemental arched layer corresponding to conical, trapezoidal, cylindrical, and rectangular tube shapes were given, respectively. The solutions of these differential equations, which can be used to determine the critical arching span, were also given. The boundary condition for solving these differential equations are that minor principal stresses equal zero at bottom surface of the arched layers. The calculated results of the critical arching span agree well with experimental data and these equations for predicting the possibility of arching can therefore be applied to industrial operation and design to preclude moving-bed flow from arching.; The mechanism of arching in a moving-bed standpipe with interstitial gas flow has been studied using the theories of particulate media mechanics and non-fluidized gas-solids flow. In order to determine the critical arching radius, which marks the change from arching to flow, a situation where all the powder is in a critical passive state of stress is considered, and the powder in the standpipe is assumed to be composed of arched layers. The differential equations of force balance for a elemental arched layer corresponding to conical, trapezoidal, cylindrical, and rectangular tube shapes were given, respectively. The solutions of these differential equations, which can be used to determine the critical arching span, were also given. The boundary condition for solving these differential equations are that minor principal stresses equal zero at bottom surface of the arched layers. The calculated results of the critical arching span agree well with experimental data and these equations for predicting the possibility of arching can therefore be applied to industrial operation and design to preclude moving-bed flow from arching.
KeywordParticle Flow Dynamics Fluid
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPARTICLE FLOW ; DYNAMICS ; FLUID
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:A1994NA64700012
Citation statistics
Cited Times:15[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/7998
Collection研究所(批量导入)
Recommended Citation
GB/T 7714
LI, HZ. MECHANICS OF ARCHING IN A MOVING-BED STANDPIPE WITH INTERSTITIAL GAS-FLOW[J]. POWDER TECHNOLOGY,1994,78(2):179-187.
APA LI, HZ.(1994).MECHANICS OF ARCHING IN A MOVING-BED STANDPIPE WITH INTERSTITIAL GAS-FLOW.POWDER TECHNOLOGY,78(2),179-187.
MLA LI, HZ."MECHANICS OF ARCHING IN A MOVING-BED STANDPIPE WITH INTERSTITIAL GAS-FLOW".POWDER TECHNOLOGY 78.2(1994):179-187.
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