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Tesi sul tema "Hydrodynamic modelling"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 luglio 2025

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1

Brajdic-Mitidieri, Petra. "Advanced modelling of hydrodynamic lubrication." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428482.

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2

Fowell, Mark Thomas. "Hydrodynamic Modelling of Textured Bearings." Thesis, Imperial College London, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.519607.

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3

Alaei, Ebrahim. "Hydrodynamic-plastic modelling of sand." Thesis, The University of Sydney, 2021. https://hdl.handle.net/2123/25046.

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This thesis focuses on proposing a novel comprehensively predictive modelling framework for granular materials which builds on the hydrodynamic procedure to satisfy the principles of thermodynamics, mass, momentum and energy conservations. In developing our physical arguments we recognise that complexity of the macroscopic mechanical response of granular media is mainly a result of kinematic degrees of freedom in granular scale. We therefore employ the original concept of two-stage irreversibility by Jiang and Liu (2009) and consider an energy sink from the mesoscopic granular entropy level to

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4

Ruziwa, Walter Rutendo. "Hydrodynamic modelling of pleated cartridge filters." Thesis, Loughborough University, 2004. https://dspace.lboro.ac.uk/2134/35607.

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The primary aim of this study is to develop and validate a hydrodynamic model for the design of pleated cartridge filters. This software package is intended to develop into a cost effective, robust and reliable design tool to enable engineers to appraise the operation of a filter. Mathematical theories are still being developed in order to build sound software for coupled flows in geometrically complicated domains. This is mainly due to the little understanding of the mathematical theories in addressing interfacial constraints in coupled flows. A 2-D computer code has been developed to simulat

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5

Manica, Rogério. "Modelling hydrodynamic interactions between deformable droplets /." Connect to thesis, 2007. http://eprints.unimelb.edu.au/archive/00003700.

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6

Allen, Leanne. "Modelling dolphin hydrodynamics : the numerical analysis and hydrodynamic stability of flow past compliant surfaces." Thesis, University of Surrey, 2001. http://epubs.surrey.ac.uk/844005/.

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Historical numerical methods for solving stiff ordinary differential equations are investigated and a new numerical framework developed and applied to a variety of hydrodynamic stability problems where the effects of passive wall compliance are investigated. The compound matrix method is set in a general coordinate free framework using exterior algebra, and is considered to be the most accurate and easy to implement method for complex systems. The effect of passive wall compliance on the Blasius boundary layer flow is studied. The linear stability of the mean flow state is considered using the

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7

Haq, Rafiq Ul. "The hydrodynamic modelling of an evolving sea." Thesis, London Metropolitan University, 1985. http://repository.londonmet.ac.uk/3318/.

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A model of a changing tidal regime in an evolving shallow sea such as the ancient North Sea is developed and solved analytically as a generalization of Taylor's problem. Characteristic scales and coefficients are treated as functions of historical time. The z dependency, dissipative and non-linear terms are effectively separated from the governing equations by the use of a Latta expansion. A composite solution is found which takes account of each of these features. A Green's function technique is used to calculate the effects of friction. A sloping bed topography is simulated by a horizontally

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8

van, 't Hoff J. "Hydrodynamic modelling of the Oscillating Wave Surge Converter." Thesis, Queen's University Belfast, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.517034.

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9

Engström, Jens. "Hydrodynamic Modelling for a Point Absorbing Wave Energy Converter." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-160319.

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Surface gravity waves in the world’s oceans contain a renewable source of free power on the order of terawatts that has to this date not been commercially utilized. The division of Electricity at Uppsala University is developing a technology to harvest this energy. The technology is a point absorber type wave energy converter based on a direct-driven linear generator placed on the sea bed connected via a line to a buoy on the surface. The work in this thesis is focused mainly on the energy transport of ocean waves and on increasing the transfer of energy from the waves to the generator and loa

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10

Crooks, David Joel. "Nonlinear hydrodynamic modelling of an oscillating wave surge converter." Thesis, Queen's University Belfast, 2017. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.725744.

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This study develops further the conceptual model of Oscillating Wave Surge Converter (OWSC) hydrodynamics and improves the representation of hydrodynamic torques in the device's nonlinear time domain numerical model. Wave excitation torque tests were used to evaluate how the wave excitation torque experienced by a static OWSC varies with wave period and amplitude for a range of OWSC pitch angles. Forced oscillation tests were used to evaluate how the radiation torque experienced by an OWSC, due to its motion through still water, varies with oscillation period, oscillation amplitude and angular

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11

Sarjamee, Samieh. "Numerical Modelling of Extreme Hydrodynamic Loading on Coastal Structures." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35124.

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Natural disasters usually occur without any warning. They can leave trail of destruction and cause much tragedy. We are at a time when we witness fast technological advances; hence, we need to apply the force of scientific advancements to decrease economic losses and the number of human deaths. Tsunami is one of the extreme environmental events that leaves nothing but a path of death and destruction, and as a result, it is essential to understand this phenomenon and identify the mitigation strategies. Several mitigation strategies have been proposed so far; however, more investigations are sti

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12

Westwater, David. "Modelling hydrodynamic and shallow water processes over vegetated floodplains." Thesis, Cardiff University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391534.

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13

Whittaker, Peter. "Modelling the hydrodynamic drag force of flexible riparian woodland." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/62503/.

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In this thesis, two practical models for predicting the drag force exerted on flexible riparian vegetation under hydrodynamic loading have been developed. The models were formulated based on the results of a unique experimental data set that consisted of high resolution force-velocity and physical property measurements for twenty-one full-scale riparian trees, in both foliated and defoliated conditions. One of the models has then been used to numerically simulate the impact of riparian woodland on the flooding characteristics of a mid-catchment river site. Analysis of photographs and video foo

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14

Harris, John M. "Modelling random wave boundary layers." Thesis, University of Liverpool, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366399.

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15

Setegn, Shimelis Gebriye. "Modelling Hydrological and Hydrodynamic Processes in Lake Tana Basin, Ethiopia." Doctoral thesis, KTH, Vattendragsteknik, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-12024.

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Lake Tana Basin is of significant importance to Ethiopia concerning water resources aspects and the ecological balance of the area. The growing high demands in utilizing the high potentials of water resource of the Lake to its maximal limit, pictures a disturbing future for the Lake. The objective of this study was to assess the influence of topography, soil, land use and climatic varia-bility on the hydrological and hydrodynamic processes of the Lake Tana Basin. The physically based SWAT model was successfully calibrated and validated for flow and sediment yield. Se-quential uncertainty fitti

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16

Henshaw, M. J. deC. "Computer modelling of hydrodynamic instability in spherical laser accelerated targets." Thesis, University of Hull, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280834.

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17

Melville, Guy T. "Hydrodynamic and economic modelling of tidal current energy conversion systems." Thesis, Robert Gordon University, 2008. http://hdl.handle.net/10059/695.

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This thesis examines the contribution of computational modelling to the development of the tidal current energy industry, against the background of increasing commercial, government, academic and public interest. It does this through the practical application of a number of computational techniques in the areas of: 1. Tidal current analysis and prediction 2. Hydrodynamic flow modelling 3. Tidal resource analysis 4. Optimised economic modelling Appropriate survey set-up is essential in gathering data. Given this, processing the data using velocity profiles; statistical techniques; and harmonic

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18

Kulkarni, A. "Three dimensional hydrodynamic modelling of combined free/porous flow regimes." Thesis, Loughborough University, 2008. https://dspace.lboro.ac.uk/2134/13001.

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In the present scenario, as advances in research, technology and engineering application have been on a rise , thus persuading researchers and engineers to employ new computer modelling techniques for the design and analysis, mainly due to time, environmental and economic constraints. Moreover it also forms a basis for any observed anomalies, when comparing with the simulated and experimental results and taking steps to develop optimum design strategies. The present research work deals with the development of novel ftlter designs when employed in aeronautical hydraulic systems. These pleated c

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19

Allsop, Steven Christopher. "Hydrodynamic modelling for structural analysis of tidal stream turbine blades." Thesis, University of Exeter, 2018. http://hdl.handle.net/10871/33219.

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The predictable nature of the tides offers a regular, reliable source of renewable energy that can be harnessed using tidal stream turbines (TSTs). The UK's practically extractable tidal stream energy resource has the potential to supply around 7 % of the country's annual electricity demand. As of 2016, the world's first commercial scale arrays have been deployed around the UK and France. The harsh nature of the marine operating environment poses a number of engineering challenges, where the optimal turbine design solution remains under investigation. In this thesis, a numerical model is devel

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20

Larsen, Genevieve Ruth. "Modelling hydrodynamic processes within Pumicestone Passage, Northern Moreton Bay, Queensland." Thesis, Queensland University of Technology, 2007. https://eprints.qut.edu.au/16634/1/Genevieve_Larsen_Thesis.pdf.

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Estuaries can be considered as vital natural resources and are unique ecosystems at the interface between terrestrial and marine environments. The increase of population density centred on these coastal features and associated anthropogenic activities such as trade, industry, agriculture and recreation can adversely affect these sensitive environments. The Pumicestone Passage, located in northern Moreton Bay, Australia, is one such estuarine environment where there are concerns about degradation of water quality resulting from rapid land use change. These changes are both immediate to the P

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21

Larsen, Genevieve Ruth. "Modelling hydrodynamic processes within Pumicestone Passage, Northern Moreton Bay, Queensland." Queensland University of Technology, 2007. http://eprints.qut.edu.au/16634/.

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Abstract (sommario):

Estuaries can be considered as vital natural resources and are unique ecosystems at the interface between terrestrial and marine environments. The increase of population density centred on these coastal features and associated anthropogenic activities such as trade, industry, agriculture and recreation can adversely affect these sensitive environments. The Pumicestone Passage, located in northern Moreton Bay, Australia, is one such estuarine environment where there are concerns about degradation of water quality resulting from rapid land use change. These changes are both immediate to the Pas

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22

Forth, Shaun Anthony. "Morphological and hydrodynamic instabilities in undirectional alloy solidification." Thesis, University of Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292481.

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23

Suckling, H. "Modelling of hydrodynamic effects and optimization of energy benefit in tidal power schemes." Thesis, University of the West of England, Bristol, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233602.

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Energy Benefit in Tidal Power Schemes' by Helen Suckling Abstract Predictions of energy output from a barrage in the Severn Estuary can be made by using a mathematical model describing the operation of the barrage linked to one of tidal flow. Estimates of the likely energy production from such a barrage have been made using a flat surface model of the estuary which incorporates real machinery operating characteristics. The flow through the barrage can be controlled optimally in order to obtain the greatest amount of energy from the tides. The energy predictions made by using the flat surface m

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24

Semuwemba, James. "Modelling tracer breakthrough curves to determine stream reaeration and hydrodynamic properties." Thesis, Queen's University Belfast, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.580085.

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This study investigates and applies robust modelling techniques for analysis of tracer concentration versus time curves (so-called breakthrough curves; BTCs) for the direct (gas) tracer technique in an attempt to quantify more accurately both the reaeration coefficient (K2) and other hydrodynamic parameters with associated uncertainties. Three issues related to the Peak, Modified Peak and Area methods (the standard methods in literature) used to compute K2 from tracer BTCs have been addressed. (a) The three methods rely on the presumption that transport is prescribed by the Advection-Dispersio

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25

Zainy, Mohammed. "Hydrodynamic modelling of cerebrospinal fluid motion within the human ventricular system." Thesis, Nottingham Trent University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.272855.

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26

Wang, Xio Shan. "Hydrodynamic behaviour and coal combustion modelling of a circulating fluidised bed." Thesis, University of Leeds, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303327.

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27

Bhinder, Majid. "3D non-linear numerical hydrodynamic modelling of floating wave energy converters." Ecole centrale de Nantes, 2013. http://www.theses.fr/2013ECDN0028.

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Dans cette thèse, on cherche à quantifier l’impact des effets d’origine visqueuse sur la dynamique et la production d’énergie des systèmes houlomoteurs. A l’heure actuelle, l’état de l’art pour évaluer la production d’énergie des houlomoteurs repose sur des approches en théorie linéarisée des écoulements potentiels (codes BEM) car la CFD (Computational Fluid Dynamics) est encore trop coûteuse en terme de temps de calcul. Cependant, l’approche potentielle est limité par les hypothèses de linéarité sur laquelle elle repose. Ces limitations doivent être comprises et des améliorations apportées. E

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28

Vallet, Alexandra. "Hydrodynamic modelling of the shock ignition scheme for inertial confinement fusion." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0214/document.

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Le schéma d'allumage par choc pour la fusion par confinement inertiel utilise une impulsion laser intense à la fin d'une phase d'assemblage de combustible. Les paramètres clefs de ce schéma sont la génération d'une haute pression d'ablation, l'amplification de la pression du choc généré par un facteur supérieur à cent et le couplage du choc avec le point chaud de la cible. Dans cette thèse, de nouveaux modèles semi-analytiques sont développés afin de décrire le choc d'allumage depuis sa génération jusqu'à l'allumage du combustible. Tout d'abord, un choc sphérique convergent dans le coeur pré-c

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29

Angelotti, de ponte rodrigues Natalia. "Open water swimming : Monitoring and hydrodynamic modelling for sanitary conditions assessment." Electronic Thesis or Diss., Marne-la-vallée, ENPC, 2023. http://www.theses.fr/2023ENPC0046.

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La baignade en eau libre connait un fort engouement, notamment en milieu urbain où les canicules estivales sont de plus en plus fréquentes. Pour éviter les risques sanitaires, le suivi d’indicateurs de micro-organismes pathogènes, les bactéries indicatrices fécales (BIF) telles que E. coli, est nécessaire. Les résultats des méthodes de référence en laboratoire sont obtenus au mieux en 24h.Pour qu’une baignade soit ouverte au public, les concentrations de BIF doivent être inférieures à des seuils réglementaires. En cours d'eau, ces conditions peuvent être estimées à partir de mesures en un poin

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30

Chen, Yiping. "Numerical modelling of solute transport processes using higher order accurate finite difference schemes : numerical treatment of flooding and drying in tidal flow simulations and higher order accurate finite difference modelling of the advection diffusion equation for solute transport predictions." Thesis, University of Bradford, 1992. http://hdl.handle.net/10454/4344.

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The modelling of the processes of advection and dispersion-diffusion is the most crucial factor in solute transport simulations. It is generally appreciated that the first order upwind difference scheme gives rise to excessive numerical diffusion, whereas the conventional second order central difference scheme exhibits severe oscillations for advection dominated transport, especially in regions of high solute gradients or discontinuities. Higher order schemes have therefore become increasingly used for improved accuracy and for reducing grid scale oscillations. Two such schemes are the QUICK (

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31

Phelps, Jack. "Modelling hydrodynamic transport and larval dispersal in North-East Atlantic Shelf seas." Thesis, University of Liverpool, 2015. http://livrepository.liverpool.ac.uk/2026939/.

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This thesis presents a series of numerical modelling studies into hydrodynamic transport and larval dispersal. The initial investigation seeks to evaluate retention timescales in Liverpool Bay. The flushing time and residence time are equal to 136 days and 103 days respectively, however small concentrations of seawater are retained over several years due to vigorous tidal mixing. The age distribution is shown to be highly variable and dependent upon tracer input duration, however salinity can be used to estimate the mean age, which is not directly observable in practice. Chapters 3, 4 and 5 al

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32

McEwan, Robert. "Interdisciplinary study of hydrodynamic and biogeochemical processes of a large-scale river plume." Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/1551.

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This research has utilised the Massachusetts Institute of Technology gen- eral circulation model (MITgcm) along with observations taken as part of the River In uences on Shelf Ecosystems (RISE) study to investigate the dynamic processes associated with the Columbia River plume at different temporal and spatial scales. Firstly, a high resolution ( x= y=25 m) investigation of the near-field plume was undertaken using the fully non-hydrostatic mode of the MITgcm. This resulted in the reproduction of a detailed inner plume as well as a series of radiated internal waves. In addition to first mode i

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33

Goodhue, Nigel David. "Hydrodynamic and water quality modelling of the lower Kaituna River and Maketu Estuary /." The University of Waikato, 2007. http://hdl.handle.net/10289/2375.

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The Maketu Estuary is a shallow intertidal estuary (2.3 km2) located in the Bay of Plenty, North Island, New Zealand. The Kaituna River contributes the largest freshwater flow into the estuary through control gates. Lake Rotoiti and indirectly Lake Rotorua supply the base flow to the Kaituna River, with tributaries along the 50 km reach also significantly contributing to the flow. Water quality within the river is affected by elevated nutrients, faecal coliforms, high oxygen demand and algae concentrations derived from the lakes as well as contributions from tributaries and industrial and urba

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34

Jennings, Christopher Ashley. "Radiation transport effects in wire array Z pinches and magneto-hydrodynamic modelling techniques." Thesis, Imperial College London, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423270.

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35

Roc, Thomas. "Numerical modelling for hydrodynamic impact and power assessments of tidal current turbine arrays." Thesis, University of Plymouth, 2013. http://hdl.handle.net/10026.1/1557.

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Channel constrictions in which strong currents are mainly driven by tidal processes represent sites with high potential for harvesting renewable and predictable tidal stream energy. Tidal Current Turbines (TCTs) deployed in arrays appear to be the most promising solution to efficiently capturing this carbon neutral energy resource. However to ensure the sustainable character of such projects, the balance between power extraction maximization and environmental impact minimization must be found so that device layout optimization takes into account environmental considerations. This is particular

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36

Gardano, Paola. "Modelling of hydrodynamic forces acting on the human arm during front crawl stroke." Thesis, Queen Mary, University of London, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.504543.

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Propuisive force generated by swimmers' hand/forearm is the key factor determining performances in human competitive swimming. This work analysed the propulsion given by swimmer's arm performing front crawl stroke by using two complimentary methods: experimental tests and computational methods. The experimental part of the project aimed to derive both appropriate input and validation data from wind tunnel experiments on two models of human arm in order to obtain Drag and Lift values and related pressure distribution. However, due to the limitations in the experimental methods in terms of added

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37

Gao, Guanghai. "Numerical modelling of hydrodynamic and sediment-bacteria interaction processes in estuarine and coastal waters." Thesis, Cardiff University, 2008. http://orca.cf.ac.uk/54738/.

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A study has been undertaken to investigate and improve the representation and modelling of a range of various hydrodynamic, biochemical and sediment transport processes relating to the transport of enteric bacteria organisms in estuarine waters. In this study a relatively simple turbulence model was first further investigated to predict the complex three-dimensional flow structure in a flume with vegetation. The main purpose of this part of the study was to try and acquire accurate velocity profiles of complex flows without the need for a more advanced two-equation turbulence model, requiring

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38

Hornung, Ralf. "Numerical modelling of stratification in Lake Constance with the 1-D hydrodynamic model DYRESM." [S.l. : s.n.], 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10361133.

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39

Moore, Rowena Deborah. "Hydrodynamic and Morphometric Modelling of a Macro-Tidal Estuary : The Dee Estuary of NW England." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511030.

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40

Arnau, Notari María Rosario. "Hydrodynamic and biochemical Computational Fluid Dynamic modelling of full-scale anaerobic digesters for wastewater treatment." Doctoral thesis, Universitat Jaume I, 2022. http://dx.doi.org/10.6035/14107.2022.234094.

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Anaerobic digestion is one of the most widely used biological treatments for the stabilisation of sewage sludge, but the effectiveness of the process depends on good mixing. The Computational Fluid Dynamics (CFD) technique allows analysing the mixing and hydrodynamics, so it has been widely used to study anaerobic digestion. In this thesis, hydrodynamics in full-scale digesters have been studied by means of CFD models, evaluating their mixing systems by means of different scenarios according to mixing and design parameters and dead volumes. In a second part, a new CFD solver was developed to c

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41

Justice, Brad L. "Modelling of Calcium Carbonate Precipitation in Natural Karst Environments Under Hydrodynamic and Chemical Kinetic Control." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1145310619.

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42

Mahrabian, Mozaffar Ali. "Experimental, theoretical and computational modelling of flow in corrugated channels to investigate thermal and hydrodynamic characteristics of plate heat exchangers." Thesis, University of Bristol, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387964.

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43

Marshall, Miles Ramsvik. "Spatial variablity and pesticide leaching : measurement and modelling the hydrodynamic aspects of pesticide leaching in soils." Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402812.

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44

Appelgren, Patrik. "Experiments with and modelling of explosively driven mangetic flux compression generators." Licentiate thesis, KTH, Rymd- och plasmafysik, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9638.

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This thesis presents work performed on explosively driven magnetic flux compression generators. This kind of devices converts the chemically stored energy in a high explosive into electromagnetic energy in the form of a powerful current pulse. The high energy density of the high explosives makes flux compression generators attractive as compact power sources. In order to study these devices a generator was designed at FOI in the mid-90ies. Two generators remained unused and became available for this licentiate work. The thesis reports experiments with, and simulations of, the operation of the

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45

Ekwall, Jakob, and Julian Kolesnik Lindgren. "Hydrodynamic Modelling of the Nanjing Reach in the Yangtze River. : Managing the impact of Three Gorges dam." Thesis, KTH, Industriell ekologi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-149945.

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Due to the impoundment of the Three Gorges Dam a decrease in sediment flow has been a major factor for erosion on the riverbed further downstream in the Yangtze River. This rapport studies the water flow conditions in the Nanjing reach. It also examines the effect of building a diversion dike at the head of the reach as a measure to redistribute some of the water flow to the northern branch. This branch suffers from a declining water flow, largely as a consequence from the erosion in the southern branch. By constructing a numerical model model with the software SMS, the current conditions of t

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46

Blackman, David Rhys. "Kinetic-hydrodynamic modelling of short-pulse Doppler-shift spectroscopy experiments, and resistive filamentation of fast-electron transport." Thesis, University of York, 2017. http://etheses.whiterose.ac.uk/18765/.

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Three pump-3ω-probe Doppler-shift spectroscopy experiments are presented along with both 1D radiation-hydrodynamics modelling (HYADES) and 1D three-stage modelling process involving: HYADES radiation-hydrodynamics pre-pulse calculations; EPOCH kinetic particle-in-cell main-pulse calculation initialised from HYADES result; followed by hydrodynamic calculations, initialised from EPOCH result, of the evolution after the main-pulse. These investigations are aimed at exploring the formation of shocks at the front surface of targets after interaction with an ultra-short (30 fs), ultra-intense (10^18

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47

Iyalla, Ibiyekariwaripiribo. "Computational fluid dynamics modelling of pipeline on-bottom stability." Thesis, Robert Gordon University, 2017. http://hdl.handle.net/10059/2721.

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Subsea pipelines are subjected to wave and steady current loads which cause pipeline stability problems. Current knowledge and understanding on the pipeline on-bottom stability is based on the research programmes from the 1980’s such as the Pipeline Stability Design Project (PIPESTAB) and American Gas Association (AGA) in Joint Industry Project. These projects have mainly provided information regarding hydrodynamic loads on pipeline and soil resistance in isolation. In reality, the pipeline stability problem is much more complex involving hydrodynamic loadings, pipeline response, soil resistan

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48

Snyman, Jasper Lodewyk. "Modelling of the heliosphere and cosmic ray transport / Jasper L. Snyman." Thesis, North-West University, 2007. http://hdl.handle.net/10394/1814.

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49

Inga, Juan Ricardo. "Hydrodynamic studies and reactor modelling of a three phase slurry reactor in Fischer Tropsch application / Juan Ricardo Inga." Thesis, Potchefstroom University for Christian Higher Education, 1992. http://hdl.handle.net/10394/9611.

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In this .study the hydrodynamic characteristics of the slurry bed reactor was investigated. This study was aimed to the under" standing of the important parameters that describe the hydrodynamic regime and their quantification. In order to determine the relevant parameters the use of a theoretical model was necessary. This model should include all the hydrodynamic parameters in form of correlations. A sensitivity study was done and the parameters which have great impact were determined. An extensive literature review was done in order to gather the experience of previous investigations. Unfort

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50

Boye, Brian A. "Integrated modelling of hydrodynamic processes, faecal indicator organisms and related parameters with Improved accuracy using parallel (GPU) computing." Thesis, Cardiff University, 2014. http://orca.cf.ac.uk/60096/.

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Environmental problems and issues are not limited by artificial boundaries created by man. Usually there are different teams or individuals working on the catchments, estuaries, rivers and coastal basins in different countries using different parameters and formulations for various processes. However, the system is a natural one and as such no boundaries exist. When a rain drop of water moves from a catchment to a stream, river or estuary and to the sea, it does not know at any stage whether it is in the catchment, river, estuary or sea. In recent years there has been growing concern about the

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