IMHE OpenIR  > 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, Yan1; Wang, Hui-feng1; Chen, Hua-yong2; Hu, Kai-heng2; Wang, Xie-kang1
2017-09-01
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume14Issue:9Pages:1728-1738
SubtypeArticle
AbstractParticle 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.
KeywordHyper-concentrated Flow Debris Flow Flow Regime Velocity Profile Turbulent Kinetic Energy Open Channel
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11629-016-4132-y
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordPARTICLE IMAGE VELOCIMETRY ; SUSPENDED SEDIMENT CONCENTRATION ; VELOCITY PROFILES ; PIV TECHNIQUE ; TURBULENT ; 2-PHASE ; SUSPENSIONS ; FLUME ; WATER ; FINE
Language英语
WOS SubjectEnvironmental Sciences
WOS IDWOS:000409490000005
Funding OrganizationOpen 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)
PublisherSCIENCE PRESS
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/19070
CollectionJournal of Mountain Science_Journal of Mountain Science-2017_Vol14 No.9
山地灾害与地表过程重点实验室
Corresponding AuthorWang, Xie-kang
Affiliation1.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
Recommended Citation
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.
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