laboratory analysis of mudflow properties|LABORATORY ANALYSIS OF MUDFLOW PROPERTIES : distributing LABORATORY ANALYSIS OF MUDFLOW PROPERTIES. By Jim S. O'Brien1 and Pierre Y. Julien,2 Member, ASCE. ABSTRACT: A rotational viscometer has been designed for . webWe offer instant play to all our games without downloads, login, popups or other distractions. Our games are playable on desktop, tablet and mobile so you can enjoy them at home or on the road. Every month over 50 million gamers from all over the world play their favorite games on Poki.
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A rotational viscometer has been designed for laboratory measurements of the rheological properties of natural mudflow deposits in Colorado. The mudflow matrices comprised of silt and clay particle.“Time dependent properties of cohesive sediment relevant to sedimentation .
LABORATORY ANALYSIS OF MUDFLOW PROPERTIES. By Jim S. O'Brien1 and Pierre Y. Julien,2 Member, ASCE. ABSTRACT: A rotational viscometer has been designed for .
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The objective of this study is to provide a better description of the physical properties of mudflow material. Laboratory measurements of the rheological properties of natural mudflow deposits .Laboratory Analysis of Mudflow Properties. A rotational viscometer has been designed for laboratory measurements of the rheological properties of natural mudflow deposits in . Discussion of “Laboratory Analysis of Mudflow Properties” by Jim S. O'Brien and Pierre Y. Julien (August, 1988, Vol. 114, No. 8)A rotational viscometer has been designed for laboratory measurements of the rheological properties of natural mudflow deposits in Colorado. The mudflow matrices comprised of silt and clay particles are sheared under temperature-controlled conditions at volumetric sediment concentrations ranging from 0.10 – 0.45.
A laboratory study of the rheology of mudflows in Hangzhou Bay, China, is reported in this paper. Both the steady and oscillatory (dynamic) rheological properties are studied using RMS-605 rheometer. A Dual-Bingham model is proposed for analyzing flow curves and compared with Worrall-Tuliani model.
Laboratory Analysis of Mudflow Properties
A rotational viscometer has been designed for laboratory measurements of the rheological properties of natural mudflow deposits in Colorado. The mudflow matrices comprised of silt and clay particles are sheared under temperature-controlled conditions at volumetric sediment concentrations ranging from 0.10 – 0.45. To date, direct laboratory tests on the liquid limit (LL) and their direct simulations have not yet been conducted. In the present research, the direct shear test (DST) and the moving ball test (MBT) are conducted by Lee et al. (2008) and Hendriks (2009), respectively, to obtain the yield stress (τ y), which is the key mudflow parameter for the numerical simulation.
A quadratic rheological model, developed from field and laboratory mudflow data, enables appropriate simulations of flooding conditions ranging from clear water to hyperconcentrated sediment flows. Computer‐aided design (CAD) graphics of predicted time‐sequenced flood depths automates the delineation of flood hazards. DOI: 10.1016/S1001-6279(10)60014-5 Corpus ID: 129656182; A laboratory study of rheological properties of mudflows in Hangzhou Bay, China. @article{Huang2009ALS, title={A laboratory study of rheological properties of mudflows in Hangzhou Bay, China.}, author={Zhenhua Huang and Huhe Ao-de}, journal={International Journal of Sediment .
Rheological analyses, however, reveal exceptionally low yield strengths (3.5 Pa and lower) for laboratory slurries (<1.5 g/cm 3) made with the mudflow sediments. The low yield strengths are inconsistent with previous interpretations that the mudflows were spawned from glacial sediments that were rapidly deposited as till deltas on the upper .
Several basic properties of the mudflow samples are summarized in Table 1. . b 11, b 12, b 21 and b 22, obtained by the regression analysis for each mudflow sample, according to the regions (1) and (2) respectively, are presented in Fig. 4. A good agreement can be observed between the experimental data and the predicted results . Comparison between the model predictions and laboratory experiments shows reasonable agreement. The model is used to study the effect of the ambient fluid density, initial shape of the failed mass, and rheological model on the simulated propagation of the front and runout characteristics of muddy debris flows. . Mudflow rheology and dynamics .
LABORATORY ANALYSIS OF MUDFLOW PROPERTIES By Jim S. O'Brien1 and Pierre Y. Julien,2 Member, ASCE . ABSTRACT: A rotational viscometer has been designed for laboratory measurements of the rheological properties of natural mudflow deposits in Colorado.
FLO‐2D is a two‐dimensional finite difference model that simulates clear‐water flood hazards, mudflows, and debris flows on alluvial fans and urban floodplains. Interactive flood or mudflow routing between channel, street, and floodplain flow is performed using a uniform grid system to describe complex floodplain topography. A quadratic rheological model, developed . The simulation of the Pine Creek mudflow during the 1980 eruption of Mount St. Helens is presented as an example of our continuing progress in the physically-based analysis of natural disasters from heavily sediment-laden flows. . Laboratory Analysis of Mudflow Properties, J. Hyd. Eng., ASCE, 114(8), 877–887. Google Scholar O'Brien, J.S., P .2013). Cui et al. (2015) carried out laboratory experiments to study the impact force of a viscous debris flow, measuring separately the dynamic pressure of the slurry and the impact pressure of the coarse grains, through a wavelet analysis of the signal. An empirical model is proposed for predicting the slurry impact, while the grain
Laboratory Analysis of Mudflow Properties. J. S. O'brien P. Julien. Environmental Science, Geology. 1988; A rotational viscometer has been designed for laboratory measurements of the rheological properties of natural mudflow deposits in Colorado. The mudflow matrices comprised of silt and clay particles . Expand. 387. PDF. For a viscoplastic mudflow basic physical properties include its density ρ, viscosity μ, and yield strength τ y. Fluid compressibility is neglected. Pore pressure, permeability, gain properties, and stress induced by the particulate phase are considered as irrelevant since pore-scale mechanisms do not dominate in the propagation of mudflows.
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Abstract: A rotational viscometer has been designed for laboratory measurements of the rheological properties of natural mudflow deposits in Colorado. The mudflow matrices comprised of silt and clay particles are sheared under temperature‐controlled conditions at volumetric sediment concentrations ranging from 0.10–0.45.The analysis of mudflow is usually divided into three components, as depicted in Fig. 1: source, . a laboratory flume channel, and a fall cone penetrometer to obtain viscosity. Butthis type of flow in the Laboratory of Analysis of Mudflow Properties, 1988 [3] and Julien & Lan, 1991 [4]. These studies indicate that the sludge flow behaves like bingham-type fluids with low deformation velocities. The rheological parameters for the simulation will be deter - mined later. 2.1 Numerical solution of the modelBased on laboratory results, the volumetric sediment concentration of a mudflow fluid matrix ranges from approximately 45% < cv < 55% (O'Brien, 1986). Mudflows exhibit high viscosity and yield stress, can travel long distances on . A detailed theological analysis of mudflow properties has been presented by O'Brien and Julien (1988), Major and .
O’Brien JS, Julien PY (1988) Laboratory analysis of mudflow properties. Journal of Hydraulic Engineering 114: 877–887. DOI: 10.1061/(ASCE)0733-9429(1988)114:8 (877) Article Google Scholar Ovarlez G, Mahaut F, Bertrand F, et al. (2011) Flows and heterogeneities with a vane tool: Magnetic resonance imaging measurements. A laboratory study of the rheology of mudflows in Hangzhou Bay, China, is reported in this paper. Both the steady and oscillatory (dynamic) rheological properties are studied using RMS-605 rheometer.
LABORATORY ANALYSIS OF MUDFLOW PROPERTIES
A rotational viscometer has been designed for laboratory measurements of the rheological properties of natural mudflow deposits in Colorado. The mudflow matrices comprised of silt and clay particles are sheared under temperature-controlled conditions at volumetric sediment concentrations ranging from 0.10-0.45. O.'Brien, J. S. and P. Y. Julien (1985), “Physical properties and mechanics of hyper-concentrated sediment flows, Proc. Specialty Conference on Delineation of Landslides Flash Flood & Debris flow Hazards in Utah, pp. 260–279. Google Scholar O'Brien, J.S. and P. Y. Julien (1988) “Laboratory analysis of mudflow properties.” Xu and Huhe reported the rheological analysis of estuarine mud at Lianyungang, China with the help of both steady and dynamic rheological methods [12]. They found an exponential increase in the yield stress of their mud samples as a function of increasing volume fraction of solids. . Laboratory analysis of mudflow properties. J. Hydraul. Eng . 2 Henan International Joint Laboratory of Dynamics of Impact and Disaster of Engineering Structures, Nanyang Institute of Technology, Nanyang, China; . O'Brien J. S, & Julien, P. Y. (1998) Laboratory analysis of mudflow properties. Journal of Hydraulic Engineering, 114(8), 877–887.
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laboratory analysis of mudflow properties|LABORATORY ANALYSIS OF MUDFLOW PROPERTIES