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Showing 1 to 17 of 17 for “"erosion process"”.
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A model to predict the lifetime of pneumatic conveyor bends
… in pneumatic conveyor pipelines in industrial processes are a well-known hindrance to the smooth operation of any plant. Unanticipated stoppages can have serious financial implications for any company using pneumatic conveying technology, and health and safety factors are also paramount. This …
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Continuous-wave cavity ring down spectroscopy sensor for Hall thruster erosion measurement
… time (several thousands of hours). Sputter erosion of boron nitride (BN) acceleration channel wall is principal lifetime limitation for Hall thrusters. The sputtered particles can redeposit causing a critical contamination effect. There is an urgent need for improved experimental tools to …
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The role of accessory minerals in inhibiting bentonite erosion in the geological disposal of higher activity radioactive waste
The chemical erosion of bentonite buffer material, during periods of glaciation, is a point of concern in the approval of safety cases for disposal of radioactive waste in crystalline rock. Currently, quantitative mass loss assessments are based on a 100% montmorillonite buffer and lead to …
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An application of LIDAR to examine erosion in the southern Monterey Bay during the 1997-98 El Nino
… Bay region and to qualitatively assess the erosional impact of large storms on coastal dune areas. LIDAR provides a rapid and accurate survey technique to measure topographic elevation. A LIDAR survey was performed in October 1997 and then a second survey in April 1998 to measure the erosion …
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A water flow algorithm for optimization problems
… the hydrological cycle in meteorology and the erosion phenomenon in nature. Basic operators of this algorithm are based on the raindrop distribution simulation, the property of water flow always moving to lower positions, and the erosion process to overcome obstacles. In this thesis, our focus …
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Pressure drop and flow characteristics for the pneumatic transport of fine particles through curved and straight circular pipes
… the flowing suspension. Investigations into bend erosion have explained the mechanism of the erosion process, and the data analysis has produced an equation which defines the mean wear rate as a function of the mean air velocity and the solids-to-air mixture ratio. This study has revealed the need …
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Erosion and nutrient loading characteristics of two small agricultural watersheds in Piedmont Virginia
The erosion process was characterized on two small agricultural watersheds in Piedmont Virginia. Rainfall and runoff were measured for all storms at both watersheds over a two year monitoring period. Although the data base was relatively short, the data covered a wide range of rainfall and runoff …
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Computational modeling of brittle impact erosion mechanisms
Materials are subjected to an erosion-corrosion environment in a wide range of applications today. Elevated temperatures promote the formation of oxide layers in jet engines. In fluidized bed boilers, the bed materials and piping of slurries and caustic materials cause erosion and corrosion. The …
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The erosion of ductile metals by solid particle impact
Erosion is a wear process, in which surface damage is caused by the repeated application of high localised stresses. Erosion by solid particle impact is a problem of great practical significance which can result in component failures in, for example, turbines and energy conversion systems. This …
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The erosion of pipe bends in pneumatic conveying systems
… parameters involved in the erosive wear process in 90 pipe bends, by a stream of pneumatically conveyed suspensions of solid particles. From appropriate analysis of the test data, a basis of correlation in terms of the respective parameters has been established, from which the likelihood …
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Assessment of Site and Soil Characteristics of Rill Erosion Following the Lockheed Fire in the Little Creek Watershed, Swanton Pacific Ranch
… subwatershed where an extensive network of rill erosion had occurred. The purpose of this study was to determine what factors were related to the erosion process on two burned hillslopes. Water repellency, infiltration, saturated hydraulic conductivity, and particle size class were assessed to …
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Smart rocks for bridge scour monitoring -- Design and localization using electromagnetic techniques and embedded orientation sensors
<p>"River bridge scour is an erosion process in which flowing water removes sediment materials (such as sand, rocks) from a bridge foundation, river beds and banks. As a result, the level of the river bed near a bridge pier is lowering such that the bridge foundation stability can be compromised, …
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Development and evaluation of the manufacture of a coronary stent for the South African market
… to manufacture stent prototypes by spark erosion to establish the general suitability of the method for stent manufacturing. The initial design was adjusted several times to the manufacturing process and suitable machine parameters were evaluated. For comparison a stent of a similar design …
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Experimental investigation of leakage-induced pipe erosion outside of pipe leaks
… fluidisation offers an explanation for the erosion of pipe material adjacent to pipe leaks. In this study, the removal of pipe material adjacent to leaks due to internal fluidisation has been termed "leakage-induced pipe erosion." This phenomenon has received minimal attention from …
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Advancements for the Numerical Simulation of Free Fall Penetrometers and the Analysis of Wind Erosion of Sands
… infrastructure will be subjected to increased erosion and scouring, endangering the people they are meant to protect. Understanding soil dynamics and fluid interaction is crucial to predict the effects of sand erosion. In particular, the study of wind erosion of sands in coastal dunes is …
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Analysis of soil erodability and rainfall erosivity on the Soutpansberg Range, Limpopo Province, South Africa
Soil erosion is a global challenge that threatens ecological functionality. The need for better soil conservation practices keeps growing due to the twin challenges of climate change and population growth. However, effective soil erosion management solutions remain elusive to practitioners due to …
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Evaluación de procesos de erosión en pistas forestales no pavimentadas: (Sistema Ibérico noroccidental, La Rioja)
… functioning, suggest an increase of erosion processes (both variety and intensity) and in sediment yield, particulary in those hill-roads that were built with low budgets, and carry heavy traffic and do not include even minimal conservation techniques. In the mountains of La Rioja, …