The properties of dilute debris flow and hyper-concentrated flow in different flow regimes in open channels

doi:10.1007/s11629-016-4132-y

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 > Journal of Mountain Science > Journal of Mountain Science-2017 > Vol14 No.9

	The properties of dilute debris flow and hyper-concentrated flow in different flow regimes in open channels
	Liu, Yan 1; Wang, Hui-feng 1; Chen, Hua-yong2 ; Hu, Kai-heng2 ; Wang, Xie-kang 1
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2017-09-01
卷号	14 期号:9 页码:1728-1738
关键词	Hyper-concentrated Flow Debris Flow Flow Regime Velocity Profile Turbulent Kinetic Energy Open Channel
ISSN号	1672-6316
DOI	10.1007/s11629-016-4132-y
文献子类	Article
英文摘要	Particle Image Velocimetry (PIV) technique was used to test the analogues of hyper-concentrated flow and dilute debris flow in an open flume. Flow fields, velocity profiles and turbulent parameters were obtained under different conditions. Results show that the flow regime depends on coarse grain concentration. Slurry with high fine grain concentration but lacking of coarse grains behaves as a laminar flow. Dilute debris flows containing coarse grains are generally turbulent flows. Streamlines are parallel and velocity values are large in laminar flows. However, in turbulent flows the velocity diminishes in line with the intense mixing of liquid and eddies occurring. The velocity profiles of laminar flow accord with the parabolic distribution law. When the flow is in a transitional regime, velocity profiles deviate slightly from the parabolic law. Turbulent flow has an approximately uniform distribution of velocity and turbulent kinetic energy. The ratio of turbulent kinetic energy to the kinetic energy of time-averaged flow is the internal cause determining the flow regime: laminar flow (kI.../KI... < 0.1); transitional flow (0.1 < kI.../KI... < 1); and turbulent flow (kI.../KI... > 1). Turbulent kinetic energy firstly increases with increasing coarse grain concentration and then decreases owing to the suppression of turbulence by the high concentration of coarse grains. This variation is also influenced by coarse grain size and channel slope. The results contribute to the modeling of debris flow and hyper-concentrated flow.
WOS关键词	PARTICLE IMAGE VELOCIMETRY ; SUSPENDED SEDIMENT CONCENTRATION ; VELOCITY PROFILES ; PIV TECHNIQUE ; TURBULENT ; 2-PHASE ; SUSPENSIONS ; FLUME ; WATER ; FINE
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000409490000005
资助机构	Open Foundation of Key Laboratory of Mountain Hazards and Earth Surface Process, Chinese Academy of Sciences(201503) ; Key Research Program of the Chinese Academy of Sciences(KZZD-EW-05-01) ; National Natural Science Foundation of China(51579163) ; Open Foundation of State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University(SKHL1426)
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/19070]
专题	Journal of Mountain Science _Journal of Mountain Science-2017_Vol14 No.9 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
通讯作者	Wang, Xie-kang
作者单位	1.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Sichuan, Peoples R China 2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yan,Wang, Hui-feng,Chen, Hua-yong,et al. The properties of dilute debris flow and hyper-concentrated flow in different flow regimes in open channels[J]. JOURNAL OF MOUNTAIN SCIENCE,2017,14(9):1728-1738.
APA	Liu, Yan,Wang, Hui-feng,Chen, Hua-yong,Hu, Kai-heng,&Wang, Xie-kang.(2017).The properties of dilute debris flow and hyper-concentrated flow in different flow regimes in open channels.JOURNAL OF MOUNTAIN SCIENCE,14(9),1728-1738.
MLA	Liu, Yan,et al."The properties of dilute debris flow and hyper-concentrated flow in different flow regimes in open channels".JOURNAL OF MOUNTAIN SCIENCE 14.9(2017):1728-1738.