Effects of mud slurry on flow resistance of cohesionless coarse particles

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 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, Juan 2
刊名	POWDER TECHNOLOGY
	2017-04-01
卷号	310 页码:1-7
关键词	Mud slurry Cohesionless particles Excess pore fluid pressure Flow resistance Rheology
ISSN号	0032-5910
通讯作者	Hongjuan Yang
英文摘要	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.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Engineering, Chemical
研究领域[WOS]	Engineering
关键词[WOS]	DEBRIS FLOWS ; INTERSTITIAL FLUID ; GRANULAR FLOWS ; SUSPENSIONS ; AVALANCHE ; STRESS
收录类别	SCI
语种	英语
WOS记录号	WOS:000395211800001
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/18409]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
作者单位	1.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
推荐引用方式 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.