11,127 research outputs found
Ion-irradiation Induced Clustering in W-Re-Ta, W-Re and W-Ta alloys: an Atom Probe Tomography and Nanoindentation Study-Data
No full textThis is the data in Excel format that underpins the figures in Ion-irradiation Induced Clustering in W-Re-Ta, W-Re and W-Ta alloys: an Atom Probe Tomography and Nanoindentation Stud
CFD modelling of the gas-solid flow dynamics and thermal conversion processes in fluidised beds
No full textEThOS - Electronic Theses Online ServiceGBUnited Kingdo
Movement of water in restructured saline and sodic clay topsoils under a rainfall simulator
No full textThe nature of water movement through freely draining saturated and field moist aggregates of saline sodic clay topsoil was studied using 200 mm long columns filled with soil aggregates. Water containing tritium as a tracer was supplied either by means of rainfall simulator or directly to the surface of the soil under a negative pressure head of 500 Pa.The proportion of macropore and micropore flow was elucidated. The micropores of the aggregates were shown to convey very little water (0.013 mm h?) and hence, even at low rainfall intensities water was expected to move down through the macropores. In practice, at a low water application rate of 0.6 mm h? drainage did not begin from the base of the column until the aggregates had become fully saturated due to mobile water in the macropores being continuously absorbed into the micropores. The results, however, indicated that extensive rapid bypassing does occur at medium and high rainfall intensities ( > 2.3 mm ?) , with the result that a large proportion of the water falling on the unsaturated plough layers of clay soils is drained before the topsoil becomes saturated.The soil absorbed water continuously during the application of the equivalent of a wetter than average winter's rain (400 mm), the rate of absorption being directly proportional to the amount of salt leached.Tritium, used as a tracer, was found to be preferentially absorbed by the clay during the leaching process, the concentration in the soil water rising to 1.8 times that of the applied tritiated water.<br/
Behavioural responses of juvenile Atlantic salmon (Salmo salar) to presence of boulders
No full textThe influence of boulder presence on the behaviour of juvenile Atlantic salmon (Salmo salar) was investigated experimentally in an indoor flume fed by a 161s(-1) flow of natural river water. The flume was divided into 16 arenas (each 1 m2) that were landscaped with river gravel and standardized boulders, to represent relative 'complex' or 'simple' habitats. Each arena housed three wild-caught fish. In a three-week trial, the effects of landscape on aspects of individual behaviour were recorded. Food intake was highest in the simple landscape and directly related to social status and time spent in the water column. The fish in the complex chambers actively maintained station in the water column significantly more than fish in simple landscapes and therefore partially compensated for reduced foraging rates associated with complexity. Fish in simple chambers spent more time orientated upstream than those in complex landscapes. There was no evidence that habitat complexity influenced levels of aggression, average aggressive distance, 'constrained' territory size, or dominance. Activity and space use varied with social status. Overall, this study illustrates that addition of boulders can result in costs to Atlantic salmon parr, which can be expected to offset to some extent benefits brought about by increased stream complexity. Work is now needed to evaluate the balance of costs and benefits at different life stages and under various environmental conditions
Adaptive mesh refinement of gas-liquid flow on an inclined plane
No full textCarbon Capture & Storage (CCS) is one of the various methods that can be used to reduce the carbon footprint of the energy sector. The efficiency with which CO2 is absorbed from flue gas using packed columns is highly dependent on the structure of the liquid films that form on the packing materials. This work examines the hydrodynamics of these liquid films using the CFD solver, OpenFOAM to solve two-phase, isothermal, non-reacting flow using the volume-of-fluid (VOF) method. Local adaptive mesh refinement (AMR) is used to ensure improved resolution of the geometrical grids at the gas-liquid interface. Comparisons are made between the solutions obtained using AMR and those obtained using highly refined static meshes. It was observed that local AMR produced results with much better correlation to experimental dat
Tu Tu Tu - Ta Ta
No full textTu tu tu - Ta ta is a five-sound pattern produced by the Afro-Latin instrument known as clave. The clave serves as a fundamental rhythmic cell, integral to every Afro-Latin and Latin American traditional genre. This pattern forms the foundation and structure of the music, guiding the arrangement and direction of all other instruments. In this project, the author metaphorically uses tu tu tu - ta ta to represent the concept of home, symbolizing the key to one\u27s inner roots and the map to one\u27s own heart. Through this metaphor, tu tu tu - ta ta is explored as the sound of home, encapsulating the essence of belonging and identity.https://remix.berklee.edu/graduate-studies-cmat/1105/thumbnail.jp
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