IMHE OpenIR  > 山地灾害与地表过程重点实验室
Effects of mud slurry on flow resistance of cohesionless coarse particles
Yang, Hongjuan1,2; Wei, Fangqiang2; Hu, Kaiheng2; Lyu, Juan2
Corresponding AuthorHongjuan Yang
2017
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
EISSN1873-328X
Volume310Pages:1-7
SubtypeArticle
Abstract

Laboratory experiments were performed to investigate the effect of mud slurry on the flow resistance of cohesionless particles in debris flow. For one thing, natural angles Of repose were measured for the gravel materials resting in air, in water, and in mud slurry separately. For another, rheological tests Were taken using a vane rheometer to measure the torque-time response of sand particles Within mud slurries of varying solid concentrations both at low and high rotational speeds. The stable torque obtained at the low rotational rate, which represents flow resistance primarily caused by particle contact friction, was nondimensionalized to compare the internal friction coefficient in each case. Furthermore, flow resistance of sand particles within one of the mud slurries was measured over a wide range of rotational speeds to compare with that in the dry system. It was found that the mud slurry has no significant effects on the frictional coefficient of cohesionless coarse particles. However, the mud slurry tends to decrease flow resistance of the particles, with the effect being more significant at higher rotational speeds or for more concentrated slurries. This derives from excess pore fluid pressure, which is easier to maintain at higher shear rates or within more cohesive slurries.

KeywordMud Slurry Cohesionless Particles Excess Pore Fluid Pressure Flow Resistance Rheology
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2017.01.036
WOS Subject ExtendedEngineering
Indexed BySCI
WOS KeywordDEBRIS FLOWS ; INTERSTITIAL FLUID ; GRANULAR FLOWS ; SUSPENSIONS ; AVALANCHE ; STRESS
Language英语
Quartile2区
TOP
WOS SubjectEngineering, Chemical
WOS IDWOS:000395211800001
Funding OrganizationNational Natural Science Foundation of China(41201011) ; Key Research Program of the Chinese Academy of Sciences (CAS)(KZZD-EW-05-01) ; Youth Talent Team Program of Institute of Mountain Hazards and Environment ; CAS(SDSQB-2013-01)
Accession numberAccession number:20170203242241
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/18409
Collection山地灾害与地表过程重点实验室
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Peoples R China
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Yang, Hongjuan,Wei, Fangqiang,Hu, Kaiheng,et al. Effects of mud slurry on flow resistance of cohesionless coarse particles[J]. POWDER TECHNOLOGY,2017,310:1-7.
APA Yang, Hongjuan,Wei, Fangqiang,Hu, Kaiheng,&Lyu, Juan.(2017).Effects of mud slurry on flow resistance of cohesionless coarse particles.POWDER TECHNOLOGY,310,1-7.
MLA Yang, Hongjuan,et al."Effects of mud slurry on flow resistance of cohesionless coarse particles".POWDER TECHNOLOGY 310(2017):1-7.
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