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Dissertations / Theses on the topic 'Re-suspension'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 March 2023

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1

Karadogan, Erol. "Numerical Modeling Of Re-suspension And Transport Of Fine Sediments In Coastal Waters." Master's thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12605676/index.pdf.

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In this thesis, the theory of three dimensional numerical modeling of transport and re-suspension of fine sediments is studied and a computer program is develped for simulation of the three dimensional suspended sediment transport. The computer program solves the three dimensional advection-diffusion equation simultaneously with a computer program prepared earlier for the simulation of three dimensional current systems. This computer program computes the velocity vectors, eddy viscosities and water surface elavations which are used as inputs by the program of fine sediment transport. The model

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2

Sobotka, Molly. "Legacy sediments in streams - effects on nutrient partitioning during simulated re-suspension events." VCU Scholars Compass, 2011. http://scholarscompass.vcu.edu/etd/2564.

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Anthropogenic inputs of nutrients and sediment are a widespread problem in U.S. streams causing localized impairment and contributing to eutrophication of coastal habitats. Sediments and dissolved nutrients interact through diverse processes including ion exchange, sorption and biotic assimilation by particle-bound bacteria. This study examined the effects of sediment re-suspension on nutrient partitioning in lab microcosms using fine benthic matter collected from two Virginia Coastal Plain streams. Kimages Creek was recently restored following dam removal and was characterized by large deposi

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3

Kularatne, Kottabogoda Angidigedera Samantha Rangajeewa. "Factors influencing sediment re-suspension and cross-shore suspended sediment flux in the frequency domain." University of Western Australia. School of Environmental Systems Engineering, 2006. http://theses.library.uwa.edu.au/adt-WU2007.0005.

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[Truncated abstract] With rapidly increasing population densities along coastlines and rising global sea levels, coastal protection has become a major concern for coastal communities. Predicting sediment transport in nearshore regions, however, is one of the most challenging tasks faced by coastal researchers in designing coastal structures or beach nourishment schemes. Although nearshore sediment transport mainly occurs in the longshore direction, cross-shore sediment transport is crucial in determining the shoreline evolution and beach morphology . . . This study investigated the factors inf

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4

Adams, Jonathan Frederick William. "Particle deposition, dispersion and re-suspension behaviour in turbulent square duct and circular pipes flows." Thesis, University of Leeds, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.574528.

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This study is concerned with the modelling of single-phase and two-phase turbulent flows in a square duct over a range of Reynolds numbers with attention focused on the deposition, dispersion and re-suspension of particles. Reynolds averaged Navier Stokes (RANS) modelling is used in conjunction with a Lagrangian particle tracker (LPT). Modelling and simulation of single- and two-phase turbulent flows in circular pipes with the presences of stationary flat beds are also considered using the previously stated methodologies, as well as large eddy simulation (LES). The performance of the RANS mode

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5

Obhrai, Charlotte. "A study of the processes controlling the re-suspension of sand under waves using acoustic instruments." Thesis, University of East Anglia, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268586.

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6

Venier, Chiara. "Evaluation of sediment properties using wind and turbidity observation and experimental investigation of the impact of macroalgal mats on sediment stability and flow dynamics in shallow tidal areas." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3425340.

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Sediment resuspension and deposition are key processes governing intertidal morphodynamics and are crucially influenced both by physical and biological factors. The present thesis addresses two important aspects of sediment trans- port processes in intertidal areas. The first topic concerns the quantitative analysis of suspended sediment concentration and wind forcing to provide estimates of sediment properties, such as settling velocity and the critical shear stress for erosion, valid at a spatial scale which is relevant for the overall morphodynamics of the system. The first part of the th

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7

Chen, Ru-Ching. "Development of a Supersonic Nozzle and Test Section for use with a Magnetic Suspension System for Re-Entry Aeroshell Models." Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case1544179612537658.

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8

MALIZIA, ANDREA. "Dust mobilization problem in an experimental nuclear reactor: experiments with stardust and simulations to validate a first re-suspension numerical model." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2010. http://hdl.handle.net/2108/1325.

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A recognized safety issue for future fusion reactors fueled with deuterium and tritium is the generation of sizeable quantities of dust. Several mechanisms [like plasma disruptions, Edge Localized Modes (ELM) and Vertical Displacement Events (VDE)] resulting from material response to plasma bombardment in normal and off-normal conditions are responsible for generating dust of micron and sub-micron length scales inside the VV (Vacuum Vessel) of experimental fusion reactors like the International Thermonuclear Experimental Reactor (ITER). The loss of coolant accidents (LOCA), loss of coolant flo

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9

Langdon, Justin David. "Design and Adaptive Control of a Lab-based, Tire-coupled, Quarter-car Suspension Test Rig for the Accurate Re-creation of Vehicle Response." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/31224.

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The purpose of this study has two parts directed toward a common goal. First, a state-ofthe-art quarter-car test platform has been designed and constructed to offer increased testing flexibility at a reasonable cost not found commercially. With this new test rig completed, the second objective is a proof-of-concept evaluation of a well known adaptive control algorithm applied to this new quarter-car test rig for the purpose of replicating the dynamic suspension response, such as a response that was recorded during a road test. A successful application of this control algorithm on the quarter-c

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10

Monte, Christiane do Nascimento, and Elisamara Sabadini Santos. "Análise da biodisponibilidade de metais a partir de ensaio de ressuspensão de sedimentos da Baía de Sepetiba, Rio de Janeiro." Niterói, 2016. https://app.uff.br/riuff/handle/1/1604.

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Submitted by Biblioteca de Pós-Graduação em Geoquímica BGQ (bgq@ndc.uff.br) on 2016-04-11T16:45:54Z No. of bitstreams: 1 Dissertação Christiane Monte.pdf: 2209030 bytes, checksum: eeebb11c7f77055af279832c47fc6546 (MD5)<br>Made available in DSpace on 2016-04-11T16:45:54Z (GMT). No. of bitstreams: 1 Dissertação Christiane Monte.pdf: 2209030 bytes, checksum: eeebb11c7f77055af279832c47fc6546 (MD5)<br>Universidade Federal Fluminense. Instituto de Química. Programa de Pós-Graduação em Geociências-Geoquímica. Niterói, RJ<br>A ressuspensão de sedimentos por processos naturais ou atividades antrópic

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11

Muller, Sébastien. "Mécanisme d'entraînement dans un décanteur gravitaire." Toulouse, INSA, 2009. http://eprint.insa-toulouse.fr/archive/00000378/.

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La production de pétrole s’accompagne de la formation d’émulsions eau-pétrole dont la séparation est réalisée dans des décanteurs gravitaires horizontaux fonctionnant en continu. La coalescence lente des gouttes d’eau avec l’interface huile-eau forme une zone dense (DPZ) dont les gouttes peuvent être remises en suspension et réentraînée. L’objectif de ce travail consiste à identifier et quantifier les mécanismes de réentraînement par une étude expérimentale. Un canal rectangulaire fermé par un déversoir permet de reproduire l’écoulement stratifié huile-DPZ-eau. Considérant la DPZ comme un syst

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12

Ossman, Mouheyddine. "La culture matérielle de la Mésopotamie du Nord et de ses voisins, d’après l’étude de la céramique, de l’Uruk récent au Bronze ancien I/II." Thesis, Lyon 2, 2013. http://www.theses.fr/2013LYO20006.

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Durant le IVe millénaire, la Mésopotamie et ses voisins ont été reliés via un vaste réseau commercial, établi par des Urukéens lors de leur expansion en Iran et dans le Nord mésopotamien. À la fin du IVe et au début du IIIe, la Mésopotamie et ses voisins ont connu une phase de crise dont les causes nous sont toujours obscures en raison de l’absence des documents écrits remontant à cette phase. A cette phase, le réseau commercial urukéen et la colonisation urukéenne en Iran et en Mésopotamie du Nord, s’étant effondrés, les sites urukéens ont été abandonnés, ainsi qu’un grand nombre de sites ind

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13

SONGR, BUN-DENW, and 宋文展. "Particle Re-suspension in Rarefied Shear Flows." Thesis, 2001. http://ndltd.ncl.edu.tw/handle/50716422473786482614.

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碩士<br>國立臺灣大學<br>應用力學研究所<br>89<br>Due to the effect of rarefied gas in the micro-scale, the Navier-Stokes equation traditionally used in the continuum model is not correct any more. We have to replace it by the Boltzmann equation. This paper is divided into two parts. The first part is an analysis of the plane rarefied Couette flow of binary gas mixture in different flow field condition based on kinetic model equations and discrete ordinate method. The second part is for the first time the application of particle motion equation combined with kinetic theory results to discuss micron size parti

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14

Pringle, Justin James. "Wind induced sediment re-suspension in a shallow lake." Thesis, 2011. http://hdl.handle.net/10413/8330.

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Wind induced turbidity within shallow lakes can greatly affect the biological functioning of a system in either a positive or negative manner. This research aims to understand and model the physical processes that cause sediment re-suspension. Lake St Lucia on the east coast of South Africa, a UNESCO World heritage site was used as a case study. Lake St. Lucia is a shallow water system which commonly experiences high levels of turbidity. Coupled with the naturally shallow depth of the lake, it is currently drought stricken, resulting in abnormally low water levels. A simple model has been deve

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15

Lin, Hong-Wei, and 林鴻維. "Characteristics and Re-suspension Evaluation of River Fugitive Dust—A Field Study in Chunghua County." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/cdvv96.

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碩士<br>中山醫學大學<br>職業安全衛生學系碩士班<br>101<br>The major work of this study was to investigate the characteristics of fugitive dust along the riverside included the bare land, riverbed of rivers which was caused by monsoon in Chunghwa County, Taiwan. This study was conducted for one year which began in June 29th, 2011, until June 28th, 2012. Two rivers, Wu River and Chuoshui River, were recruited in the study. VEREWA-F701 PM10, PM2.5, Micro-Orifice Uniform Deposit Impactor, and TSI 8520 DustTrak Aerosol Monitor were used to sample the concentrations of fugitive dust along the riverside during the mons

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