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Tesis sobre el tema "CFD"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 25 de julio de 2025

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1

Björk, Johan. "Compressor CFD simulation method development : A CFD study." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-69880.

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This master thesis project consisted of three parts that all were performed through CFD simulations with the purpose to develop Scania's methods in the subject of CFD. All parts included simulations on Scania's SC92T70 centrifugal compressor. Part one consisted of performing a mesh study for the purpose of reliability, to investigate the convergence of different parameters by refining the boundary layer. The method used is an inflation option called First layer thickness. Five different meshes were generated where the Richardson extrapolation method was used to examine the parameters between t

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2

King, Matthew Lee. "A CAD-centric Approach to CFD Analysis With Discrete Features." Diss., CLICK HERE for online access, 2004. http://contentdm.lib.byu.edu/ETD/image/etd570.pdf.

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3

Du, Jianyi. "Combustion CFD simulation." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0018/NQ56437.pdf.

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4

Gilani, Mohammad Nejad Hamzeei. "CFD of droplet entrainment." Thesis, Imperial College London, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.542939.

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5

Heinz, Matthias. "CFD- Berechnung von Axialkolbenpumpen." Technische Universität Chemnitz, 2019. https://monarch.qucosa.de/id/qucosa%3A34344.

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Axialkolbenpumpen bieten eine hohe Leistungsdichten und einfache Regelbarkeit. Allerdings neigen sie zu Kavitation, mit der Gefahr der Beschädigung und erhöhter Geräuschbildung durch Druckpulsationen. Die numerische Strömungssimulation bietet die Möglichkeit, die transienten Prozesse innerhalb dieser Pumpen zu verstehen und Optimierungsmöglichkeiten aufzuzeigen. Die komplexe Bewegung der Kolben erfordert bewegte Gitter, die translatorische und rotatorische Bewegungen sehr genau abbilden müssen. Die zu fördernde Hydraulikflüssigkeit muss als kompressibles Medium behandelt werden, insbesondere d

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6

Zaffagnini, Alberto. "Modellazione CFD di manufatti idraulici." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.

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Nel presente lavoro di tesi vengono studiati, per mezzo di simulazioni numeriche di fluidodinamica computazionale, diversi manufatti idraulici, partendo da casi più semplici la cui trattazione teorica e sperimentale è ampiamente conosciuta, come flusso attraverso una soglia e moto uniforme in canale rettangolare, fino a casi complessi di cui non esistono formulazioni teoriche ma solo sperimentali come pozzetti di salto cilindrici. In particolare, come caso conclusivo, si studia il comportamento di un manufatto ripartitore realmente esistente in un impianto di trattamento delle acque reflue.

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7

Nøttveit, Erlend. "Numerisk analyse (CFD) av stempelpumpe." Thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10575.

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<p>I denne oppgåva er det sett nærare på lekkasjar i stempelpumper. I starten presenterast den nødvendige teorien for CFD, pumper og spalter. Ein definerer deformasjons-lekkasje/trykk-lekkasje som eit forhold. Berekningar blir gjort på bakgrunn av teorien slik at ein konkret kan talfesta dette forholdet. Etter dette blir simuleringane som er utført presangtert og diskutert. Den første simuleringa er for ein enkel sylinder utan veggar. Det er med andre ord berre veskevolumet som er med. Denne modellen er brukt til å lære teknikken for deforming mesh. Dette er ein teknikk som er nødvendig f

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Vangbo, Petter Olav. "CFD in conceptual ship design." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-15480.

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Computational Fluid Dynamics (CFD) has been around for many years. It is a computer tool that can be used to find the hydrodynamic fluid performances. In ship design it is used in a wide area from smoke propagation to resistance estimations. It is however in resistance estimations that CFD have had most focus and research. There are many tools a designer can make use of nowadays. Most of the tools are computer based. This is optimization algorithms, computer aided design (CAD) and computational fluid dynamics (CFD). Using the tools should shorten the time of ship design and make better solutio

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9

Erlandsson, Johan, and Patrik Berg. "Analys av turbulensmodeller för CFD." Thesis, Uppsala universitet, Kärnfysik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-161110.

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This thesis has been a part of Forsmarks Kraftgrupp AB's evaluation of a turbulence model used in simulation of turbulent flow called PRNS (Partially Resolved Numerical Simulation). This model has promising properties and may be of use in saving computational resources. The purpose of this thesis was to analyze this model and compare it with industrially applied models such as k-omega SST and LES (Large Eddy Simulations). PRNS works as a hybrid of the k-omega SST and DNS (Direct Numerical Simulation) where a constant, RCP (Resolution Control Parameter) with a value between 0 and 1 are selected

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10

Vusirikala, Shanti. "CFD simulation of contact planarization." Diss., Rolla, Mo. : University of Missouri-Rolla, 2007. http://scholarsmine.umr.edu/thesis/pdf/Vusirikala_09007dcc80446043.pdf.

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Thesis (M.S.)--University of Missouri--Rolla, 2007.<br>Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed March 25, 2008) Includes bibliographical references (p. 77-79).

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11

Jain, Arnav. "CFD beräkning på en jetmotorinstallation." Thesis, Mälardalens högskola, Akademin för innovation, design och teknik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-21746.

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Hawk Turbine AB tillverkar mindre jetmotorer som ofta används i små obemannade och radiostyrda flygplan. I flygplansmodellen Lockheed T-33 Shooting Star är motorn monterad inuti planet varför luften måste ledas ut till atmosfären. För bästa möjliga prestanda måste ejektorn och utblåsröret som leder luften dimensioneras efter motor och flyghastighet. En 3-dimensionell CAD modell av flygplanets installation skapades och därefter simulerats i en virtuell vindtunnel med hjälp av datorprogrammet SolidWorks Flow Simulation. Flera olika utblåsrör i varierande storlekar samt olika former har testats f

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12

Hartinger, Markus. "CFD modelling of elastohydrodynamic lubrication." Thesis, Imperial College London, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444143.

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Usually elastohydrodynamic lubrication (EHL) is modelled using the Reynolds equation for the fluid flow and the elastic deformation is calculated following the Hertzian contact theory. In this thesis a CFD approach for modelling EHL is established. The full Navier-Stokes equations are used which enables the entire flow domain to be modelled and which can resolve all gradients inside the contact. Liquid properties are introduced where the viscosity is piezo-viscous, shear-thinning and temperature dependent and where the density is a function of pressure. The phenomenon of cavitation is taken in

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13

Forster, Robin Norman George. "CFD modelling of vortex combustors." Thesis, University of Surrey, 1999. http://epubs.surrey.ac.uk/770204/.

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This dissertation examines the suitability of Computational Fluid Dynamics (CFD) modelling for the production of realistic flowfields and temperature fields within a series of vortex combustion chambers of differing geometries and operating under various conditions. Initial validation of the CFD predictions was obtained through modelling of a series of isothermal vortex chambers for which a comprehensive set of experimental data was available. It was observed that CFD did indeed produce representative flowfield predictions for chambers of various geometries and operating conditions. A vortex u

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14

Graysmith, J. L. "Using CFD in engine design." Thesis, University of Warwick, 1995. http://wrap.warwick.ac.uk/4252/.

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In this thesis the author presents two areas of work; exploring the integration of Computational Fluid Dynamics (CFD) into engine design for Jaguar Cars Ltd and developing a novel 'mesh construction' method for making mesh generation both easy and fast. It is concluded that Jaguar can use CFD in the evaluation stage of the engine design process, although not in the concept stage of design. The CFD predictions are shown to be useful for detecting flow related faults and determining the general flow trends, but they should not be used as an absolute measure of the flow variables. The author has

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15

Somarathne, Shini. "Dynamic thermal modelling using CFD." Thesis, Brunel University, 2003. http://bura.brunel.ac.uk/handle/2438/5523.

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Buildings expend vast quantities of energy, which has a detrimental impact on the environment. Buildings systems are often oversized to cope with possible extreme environmental conditions. Building simulation provides an opportunity to improve building thermal design, but the available tools are typically used in combination in order to overcome their individual deficiencies. Two such tools, often used in tandem are computational fluid dynamics (CFD) and dynamic thermal modelling (DTM). DTM provides a coarse analysis, by considering external and internal thermal conditions over a building (inc

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16

Vince, Tomáš. "CFD analýza tepelného zatížení trubkovnice." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2021. http://www.nusl.cz/ntk/nusl-443458.

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This diploma thesis focuses on the phenomena of multiphase flow in a steam generator as a one of probable causes of tubes and tubesheet weld cracking. In the first part of the work, a research was carried out focusing on the boiling and the phenomenon of two-phase flow in technical applications, its characteristics and properties. The thesis continuous with an overview of available numerical multiphase models in the ANSYS Fluent 2021 R1 and a research of previously published works focused on two-phase flow with the presence of boiling. The research is followed by a description of the particula

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17

Kubíček, Radek. "CFD simulace vibrací vyvolaných prouděním." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2019. http://www.nusl.cz/ntk/nusl-403865.

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The presented diploma thesis focuses on flow-induced vibrations of a tube. The main aim and benefit is the analysis of tube stiffness in contact with the other one and the following use of obtained values and characteristics in CFD simulations. The work can be divided into three parts. The first part is about the current state of knowledge of flow-induced vibrations. It introduces the basic mechanisms of vibration and methods for their suppression. The second part deals with the determination of stiffness of defined geometry tube including the collision with the other tube. The final part demo

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18

Zach, Jiří. "Obchodování s akciovými CFD kontrakty." Master's thesis, Vysoké učení technické v Brně. Fakulta podnikatelská, 2014. http://www.nusl.cz/ntk/nusl-224713.

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The aim of this thesis is to design an investment strategy focused on tool called CFD. The first theoretical part contains basic information about financial derivates and explains basic principles of trading on stock market with contracts for difference. Chapter of the investment analysis explains the methods and rules used in trading. The practical part presents the results of my trading CFDs and evaluated my proposed strategy along with the benefits of work.

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19

Stromský, Ondřej. "Optimalizace geometrie výměníku pomocí CFD." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2008. http://www.nusl.cz/ntk/nusl-228337.

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The main task of thesis is to find optimum geometry of the heat exchanger. The biggest emphases is placed to finding the most optimum of streaming liquid in the heat exchanger and to minimisation pressure losses. There is a effort to regulate the streaming liquids in heat exchangers so that in multitube and on the shell side don´t create dead areas, it means to avoid sedimentation of particle in these places. Dead areas cause rising resistance against heat transfer and necessity of frequently cleaning the heat exchanger. For these reasons is necessary to do analyse of flowing and to looking fo

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20

Kroupa, Michal. "CFD simulace poryvu bočního větru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-318722.

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This thesis deals with the investigation of unsteady effects on vehicle that has been exposed to a crosswind gust. First crosswind velocity function was created, which is a function of both time and space. A comparison of continual and trapeze gust model was carried out. Next step was to compare unsteady and quasi-steady evolution of the aerodynamic loads using accumulated forces, surface pressures and flow field around the car. The penultimate part deals with investigation of unsteady behaviour of drag and in the last part the influence of rear geometry of the car on unsteady phenomena was in

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21

Svedjeland, Magnus. "CFD-simulering av luft- och temperaturflöde i ett apparatskåp." Thesis, University West, Department of Technology, Mathematics and Computer Science, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:hv:diva-756.

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22

Garcia, Barceló Roger. "Mesh sensitivity analysis on wind farms using CFD wind flow models and CFD wake models." Mémoire, École de technologie supérieure, 2012. http://espace.etsmtl.ca/1087/1/GARCIA_BARCELO_Roger.pdf.

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Actuellement, les énergies renouvelables semblent prendre au jour le jour plus de poids dans les politiques énergétiques actuelles. Entre les multiples formes, l’énergie éolienne, ayant une grande présence de nos jours, est celle qui présente des prévisions de majeure croissance lors des prochaines décennies. Un outil très efficace pour la prédiction de la ressource éolienne sont les simulations CFD. Cette technique permet de résoudre les équations qui gouvernent le mouvement d’écoulement en tenant compte des effets de recirculation et de séparation. Evidemment, les résultats d’une simulati

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23

Thompson, Peter Mark. "Computation of CAD-based design velocities for aerodynamic design optimisation with adjoint CFD data." Thesis, Queen's University Belfast, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.675476.

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This thesis describes the investigation and development of a novel CAD-based aerodynamic optimisation system, with the aim of allowing gradient-based optimisation of feature-based, parametric models within commercial CAD packages in timescales acceptable for industrial design processes. The process developed is based on linking parametric design velocities (geometric sensitivities computed from the CAD model representing the displacement of a point on the model boundary due to a perturbation of a CAD model parameter) with adjoint surface mesh sensitivities (which represent the derivative of a

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24

Poutiainen, Aaron. "Undertray Design and Development Procedure with CFD : An Optimization Study of Different UndertrayDesigns with CFD Computations." Thesis, KTH, Strömningsmekanik och Teknisk Akustik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-301732.

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Race car aerodynamics has played a vital part to improve lap times over the years of motor racing. Having good road adhesion with slick tires and aerodynamic downforce will increase the vehicles maximum lateral force and thus higher cornering speeds can be achieved. The undertray and diffuser is the most efficient aerodynamic component on most racing vehicles and is capable of producing six times more downforce than its contribution to drag plus, if optimized correctly, able to significantly reduce the vehicle's drag coefficient. The intent of this project is to optimize a completely unique un

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25

Dall'Olio, Giacomo. "CFD study of electric motor's cooling." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Nowadays electrification is one of the leading fields of engineering as it is seen as one of the key factors that can reduce environmental impact of human activities by reducing theirs polluting emissions. Mobility is the sector in which electric driven systems are diffusing the most. The search for performance in one of its main component, the electric motor, is therefore of fundamental importance in terms of efficiency and reliability of every electric driven applications. The optimization of thermal aspects covers a primary role and highly affect power consumption and lifetime of components

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26

Farstad, Øyvind. "CFD av strømningskarakteristikker i hydrauliske motorer." Thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-10525.

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<p>CFD-vertøy er i dagens industri et mye brukt redskap for analyse av komplekse strømningsdynamiske problemstillinger. Dette gjelder også hos Rolls-Royce Marine Deckmachinery i Brattvåg. Her blir CFD brukt på hydrauliske komponenter som ventiler og motorer. Målet med denne oppgaven er å studere muligheten for å modellere og analysere motorene til nettopp Rolls-Royce med CFD. Motoren som blir brukt i denne oppgaven er av typen MX6300, som er en hydraulisk vingemotor. Dette arbeidet bestod i å bearbeide en CAD-modell av motoren slik at den ble hensiktsmessig for CFD-analyse i programmet Flue

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27

Krepper, Eckhard, and Dirk Lucas. "CFD models for polydispersed bubbly flows." Forschungszentrum Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:d120-qucosa-28052.

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Many flow regimes in Nuclear Reactor Safety Research are characterized by multiphase flows, with one phase being a continuous liquid and the other phase consisting of gas or vapour of the liquid phase. In dependence on the void fraction of the gaseous phase the flow regimes e.g. in vertical pipes are varying from bubbly flows with low and higher volume fraction of bubbles to slug flow, churn turbulent flow, annular flow and finally to droplet flow. In the regime of bubbly and slug flow the multiphase flow shows a spectrum of different bubble sizes. While disperse bubbly flows with low gas volu

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28

Barstad, Lorentz Fjellanger. "CFD Analysis of a Pelton Turbine." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2012. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-18598.

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A Pelton design software is currently being developed at the Waterpower laboratory at NTNU. The motivation behind this software is to streamline the parametric design process for Pelton turbines. A numerical flow model is a cornerstone in this application, but the lack of a bucket geometry and model runner has prevented the development of such a model. DynaVec, a turbine producer who specializes on sediment erosion and corrosion problems, offered to help by providing a bucket geometry and a model runner.The objective of this Master's thesis was to develop and validate a CFD model that pre

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Thelin, Fredrik. "A CFD Analysis of Cyclodial Propellers." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-144535.

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The quest for more efficient machines is always ongoing in the engineering world. This project is no different. ABB are investigating a new type of propeller that seems to offer increased efficiency compared to normal screw propellers. That is a so called foil wheel propeller. The foil move in a circular pattern with the fluid stream moving in the radial direction of the propeller instead of the axial as in a screw propeller. If the propeller is placed and modeled correctly it can also be used as a thrust vectoring device. This report focuses on the fluid physics of the foil wheel propeller, o

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Walker, Patrick Gareth Chemical Engineering &amp Industrial Chemistry UNSW. "CFD modeling of heat exchange fouling." Awarded by:University of New South Wales. Chemical Engineering & Industrial Chemistry, 2005. http://handle.unsw.edu.au/1959.4/22385.

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Heat exchanger fouling is the deposition of material onto the heat transfer surface causing a reduction in thermal efficiency. A study using Computational Fluid Dynamics (CFD) was conducted to increase understanding of key aspects of fouling in desalination processes. Fouling is a complex phenomenon and therefore this numerical model was developed in stages. Each stage required a critical assessment of each fouling process in order to design physical models to describe the process???s intricate kinetic and thermodynamic behaviour. The completed physical models were incorporated into the si

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Lowe, C. "CFD modelling of solid propellant ignition." Thesis, Cranfield University, 1996. http://hdl.handle.net/1826/3921.

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Solid propellant is the highly energetic fuel burnt in the combustion chamber of ballistic weapons. It is manufactured, for this purpose, in either granular or stick form. Internal ballistics describes the behavior within the combustion chamber throughout the ballistic cycle upto projectile exit from the muzzle of the gun barrel. Over the last twenty years this has been achieved by modelling the process using two-phase flow equations. The solid granules or sticks constitute the first phase, which can be assumed to be incompressible over typical pressure ranges within the chamber. The gas-phase

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Juretic, Franjo. "Error analysis in finite volume CFD." Thesis, Imperial College London, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420616.

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Heide, Jakob, and Patrik Lans. "CFD investigation of a fin keel." Thesis, KTH, Mekanik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-148816.

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This thesis aims to help sailboat owners to decide a preferable NACA profile. A CFD comparison in terms of drag and lift coefficients between two NACA profiles have been applied on a typical fin keel. Each profile has been computed with different angles of attack to investigate the impact of small direction changes. ANSYS Fluent 13.0 is used to model the flow according to RANS k-epsilon model. The conclusion is that NACA65 series gives lower drag while NACA64 series gives higher lift.<br>Syftet med det här examensarbetet är att undersöka skillnaderna för olika NACA-kölprofiler med avseende på

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Johansson, Christopher. "Optimization of wall parameters using CFD." Thesis, KTH, Aerodynamik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-159875.

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Computational Fluid Dynamics (CFD) is commonly used to calculate the pressure drop in systems with internal ow. To get accurate results the physics of the ow must be well dened together with the right material parameters of the considered geometry. The mate- rial parameter considered in this report is the wall roughness, or sand-grain roughness, and during the thesis work it has been investigated how dierent wall roughnesses aects the pressure drop. It has also been investigated how to set up a CFD simulation to accurately calculate the pressure drop. When setting up a simulation, a good mesh

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Spentzos, Agis. "CFD analysis of 3D dynamic stall." Thesis, University of Glasgow, 2005. http://theses.gla.ac.uk/1855/.

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Focusing on helicopter aerodynamics, it is known that the aerodynamic performance of the retreating side of a rotor disk is mainly dictated by the stall characteristics of the blade. Stall under dynamic conditions (Dynamic Stall) is the dominant phenomenon encountered on heavily loaded fast-flying rotors, resulting in an extra lift and excessive pitching moments. Dynamic stall (DS) can be idealised as the pitching motion of a finite wing and this is the focus of the present work which includes three main stages. At first, comparisons between available experimental data with CFD simulations wer

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Macpherson, Iain. "A CFD investigation of synthetic jets." Thesis, University of Glasgow, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404494.

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Kokkonen, Toni. "CFD analysis of stepped planing vessels." Thesis, KTH, Mekanik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-250023.

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High speed planing hulls are currently widely used for example in recreational and emergency vessel applications. However, very little CFD research has been done for planing vessels, especially for those with stepped hulls. A validated CFD method for planing stepped hulls could be a valuable improvement for the design phase of such hulls. In this thesis, a CFD method for stepped hulls, with a primary focus on two-step hulls, is developed using STAR-CCM+. As a secondary objective, porpoising instability of two-step hulls is investigated. The simulations are divided into two parts: In the first

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38

Modiano, David. "Visualization of three dimensional CFD results." Thesis, Massachusetts Institute of Technology, 1989. http://hdl.handle.net/1721.1/41238.

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Denton, G. S. "CFD simulation of highly transient flows." Thesis, University College London (University of London), 2009. http://discovery.ucl.ac.uk/18693/.

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This thesis describes the fundamental extension and extensive testing of a robust CFD model for predicting outflow following the failure of pressurised hydrocarbon pipelines. The main thrust of the study involves the extension of the basic outflow model to account for complex pipeline systems, improvements of the theoretical basis and numerical stability. The basic model, based on the numerical solution of conservation equations using the method of characteristics, incorporates a suitable equation of state to deal with pipelines containing pressurised multi-component hydrocarbon mixtures. It u

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40

Gomez-Iradi, Sugoi. "CFD for Horizontal Axis Wind Turbines." Thesis, University of Liverpool, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.511051.

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Abhishek, Chintagunta. "Performance of CFD solver on GPU." Thesis, University of Surrey, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616889.

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The advances in multi-core architecture for general-purpose computing in the past decade have tremendously increased the available raw computing power. The two major architectures are the central processing unit (CPU) and the graphics processing unit (CPU). CPUs have been developed recently as general purpose processors. The present work is focused on the performance of unstructured CFD solvers on the CPU. For this purpose an explicit and implicit solvers were developed. The explicit solver for the CPU and the multicore CPU were generated using the OPlus 2 library. This was achieved by impleme

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42

Ghate, Devendra. "Inexpensive uncertainty analysis for CFD applications." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:6be44a1d-6e2f-4bf9-b1e5-1468f92e21e3.

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The work presented in this thesis aims to provide various tools to be used during design process to make maximum use of the increasing availability of accurate engine blade measurement data for high fidelity fluid mechanic simulations at a reasonable computational expense. A new method for uncertainty propagation for geometric error has been proposed for fluid mechanics codes using adjoint error correction. Inexpensive Monte Carlo (IMC) method targets small uncertainties and provides complete probability distribution for the objective function at a significantly reduced computational cost. A b

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Cai, Liping. "CFD modelling of chalcopyrite heap leaching." Thesis, Imperial College London, 2016. http://hdl.handle.net/10044/1/44559.

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Heap leaching is widely applied to recover metals from ore. The behaviour of the fluid and chemical species inside heaps, which involves many coupled physico-chemical phenomena, are highly variable and complex. Computational Fluid Dynamics (CFD) simulation can provide an efficient approach to investigate these phenomena and offer guidelines to improve heap design. Stagnant zones exist in the packed bed with multiphase flow, however, the conventional advection-dispersion model (ADE) failed to capture this phenomenon, therefore, the mobile immobile model (MIM) is employed to model the mass trans

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Krepper, Eckhard, and Dirk Lucas. "CFD models for polydispersed bubbly flows." Forschungszentrum Dresden-Rossendorf, 2007. https://hzdr.qucosa.de/id/qucosa%3A21632.

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Many flow regimes in Nuclear Reactor Safety Research are characterized by multiphase flows, with one phase being a continuous liquid and the other phase consisting of gas or vapour of the liquid phase. In dependence on the void fraction of the gaseous phase the flow regimes e.g. in vertical pipes are varying from bubbly flows with low and higher volume fraction of bubbles to slug flow, churn turbulent flow, annular flow and finally to droplet flow. In the regime of bubbly and slug flow the multiphase flow shows a spectrum of different bubble sizes. While disperse bubbly flows with low gas volu

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45

Drdla, Adam. "CFD simulace proudění rozváděcím mechanismem turbodmychadla." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2010. http://www.nusl.cz/ntk/nusl-229246.

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The aim of this thesis is to provide research into turbocharger regulation, and analyze the force load of vanes in the VNT mechanism of Garrett turbocharger by CFD simulation. In the thesis there is one model with two different mesh densities. It describes the relevance of supercharging vehicle engines and the kinds of supercharging aggregates in the introduction. Then, the thesis is divided into two chapters. The first chapter provides research, describing primary principle of supercharging, turbocharger construction and kinds of air regulation. The practical part of the thesis solves the for

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Przeczek, Jan. "CFD analýza vstupního kanálu turbovrtulového motoru." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2011. http://www.nusl.cz/ntk/nusl-229454.

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This diploma thesis is focused on CFD analysis of M-601 turboprop engine nacelle mounted on L-410 commuter aircraft. Calibrating exercise is performed at the beginning of the thesis in order to be more familiar with CFD problems. Next parts of the thesis are chronologically divided with respect to project progress, namely suitable geometrical model creation, mesh creation in order to obtain computational model, calculation using CFD methods, results evaluation and proposal of possible construction transformation at the conclusion.

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Pavlíček, David. "CFD modelování mísení kapalin v potrubí." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2018. http://www.nusl.cz/ntk/nusl-387733.

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This work is focused on computational modelling of mixing fluids in pipeline with static mixers. Main objective is to analyze several selected static mixers in a particular industrial application, namely dosing of the aluminium sulphate solution in the clarification process for potable water treatment. The analysis focuses on the degree of mixedness and pressure loss of individual mixers. Further, the aim of this work is to process the search of available types of static mixers. The benefit of this work is at least an effort to motivate the reader to deeper understanding of the mixing fluids,

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Sušovský, Martin. "Parametrická studie výměníku tepla pomocí CFD." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2020. http://www.nusl.cz/ntk/nusl-417779.

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In this paper is carried out basic design and calculation of tube heat exchanger with a straight tube bundle with installed systém of disk and doughnut baffles. The calculation included pressure losses and heat transfer coefficient of tubular space and shell side. Then CFD model was made for parametric study, which was focused on influence of change of the baffles geometry on the heat output of the exchanger and the pressure loses on the shell side.

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Appa, Harish. "Multiphase CFD modelling of stirred tanks." Master's thesis, University of Cape Town, 2007. http://hdl.handle.net/11427/5548.

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Includes bibliographical references (p. 67-70).<br>Stirred tanks agitated with Rushton turbines are commonly used in industry, for instance mixing processes and flotation systems. The need for more efficient systems in industries has led to the study of fluid flow within the tanks upon agitation; so that a better understanding of the phenomena can help in the optimisation of the tanks. In the recent years, efforts have been made towards the development of predictive methods using computational fluid dynamics (CFD). Among the various numerical works presented, emphasis was laid mainly on single

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Kern, Simon. "Sensitivity Analysis in 3D Turbine CFD." Thesis, KTH, Mekanik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-210821.

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A better understanding of turbine performance and its sensitivity to variations in the inletboundary conditions is crucial in the quest of further improving the efficiency of aero engines.Within the research efforts to reach this goal, a high-pressure turbine test rig has been designedby Rolls-Royce Deutschland in cooperation with the Deutsches Zentrum für Luft- und Raumfahrt(DLR), the German Aerospace Center. The scope of the test rig is high-precision measurement ofaerodynamic efficiency including the effects of film cooling and secondary air flows as well as theimprovement of numerical pred

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