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Dissertations / Theses on the topic 'Multiphase flow Computational fluid dynamics'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Gilbertson, Mark. "Mixing in multiphase jet flow : experimental comparison with a computational model." Thesis, University of Oxford, 1993. http://ora.ox.ac.uk/objects/uuid:98fae523-d738-4392-8b63-ab9cfbeaf37b.

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A series of experiments has been conducted for comparison with the results of a computer code called CHYMES. It is intended to calculate the coarse mixing of molten metal with water by solving the equations of the Separated Flow Model. These are derived by volume averaging and the terms that relate them to the particular case of participate flow are discussed. An experimental apparatus that is compatible with CHYMES and coarse mixing has been constructed which projects a jet of ball bearings into a thin tank of water. Experiments over a wide range of conditions were conducted at room temperatu

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2

Olsen, Robert. "Time-dependent boundary conditions for multiphase flow." Doctoral thesis, [Trondheim : Norges teknisk-naturvitenskapelige universitet, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-237.

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3

Biswas, Souvik. "Direct numerical simulation and two-fluid modeling of multi-phase bubbly flows." Link to electronic thesis, 2007. http://www.wpi.edu/Pubs/ETD/Available/etd-050307-224407/.

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Dissertation (Ph.D.) -- Worcester Polytechnic Institute.<br>Keywords: Multiphase flow; Two-fluid modeling; Direct numerical simulation; Two fluid modeling. Includes bibliographical references (leaves 116-119).

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4

Soncini, Ryan Michael. "Computational Simulation of Coal Gasification in Fluidized Bed Reactors." Diss., Virginia Tech, 2017. http://hdl.handle.net/10919/78733.

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The gasification of carbonaceous fuel materials offers significant potential for the production of both energy and chemical products. Advancement of gasification technologies may be expedited through the use of computational fluid dynamics, as virtual reactor design offers a low cost method for system prototyping. To that end, a series of numerical studies were conducted to identify a computational modeling strategy for the simulation of coal gasification in fluidized bed reactors. The efforts set forth by this work first involved the development of a validatable hydrodynamic modeling strategy

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Cheng, Zekang. "A moving mesh method for non-isothermal multiphase flows." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/288661.

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In this thesis, a numerical method is developed for simulating non-isothermal multiphase flows, which are important in many technical applications such as crystal growth and welding. The method is based on the arbitrary Lagrangian Eulerian method of Li (2013). The interface is represented explicitly by mesh lines, and is tracked by an adaptive moving unstructured mesh. The $P2-P1d$ finite element method (FEM) is used for discretisation and the incompressible Navier-Stokes equations are solved by the uzawa method. Firstly, a thorough study is presented on the method's capability in numerically

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6

Gunnesby, Michael. "On Flow Predictions in Fuel Filler Pipe Design - Physical Testing vs Computational Fluid Dynamics." Thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-117534.

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The development of a fuel filler pipe is based solely on experience and physical experiment. The challenge lies in designing the pipe to fulfill the customer needs. In other words designing the pipe such as the fuel flow does not splash back on the fuel dispenser causing a premature shut off. To improve this “trial-and-error” based development a computational fluid dynamics (CFD) model of the refueling process is investigated. In this thesis a CFD model has been developed that can predict the fuel flow in the filler pipe. Worst case scenario of the refueling process is during the first second

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7

Tebowei, Roland. "Computational fluid dynamics (CFD) modelling of critical velocity for sand transport flow regimes in multiphase pipe bends." Thesis, Robert Gordon University, 2016. http://hdl.handle.net/10059/2118.

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The production and transportation of hydrocarbon fluids in multiphase pipelines could be severely hindered by particulate solids deposit such as produced sand particles which accompany hydrocarbon production. Knowledge of the flow characteristics of solid particles in fluids transported in pipelines is important in order to accurately predict solid particles deposition in pipelines. This research thesis presents the development of a three-dimensional (3D) Computational Fluids Dynamics (CFD) modelling technique for the prediction of liquid-solids multiphase flow in pipes, with special emphasis

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8

Rabbani, Harris. "Pore-scale investigation of wettability effects on two-phase flow in porous media." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/porescale-investigation-of-wettability-effects-on-twophase-flow-in-porous-media(4da35c39-fc12-4d2c-8645-53bb617696aa).html.

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Physics of immiscible two-phase flow in porous media is relevant for various industrial and environmental applications. Wettability defined as the relative affinity of fluids with the solid surface has a significant impact on the dynamics of immiscible displacement. Although wettability effects on the macroscopic fluid flow behaviour are well known, there is a lack of pore-scale understanding. Considering the crucial role of wettability in a diverse range of applications; this research aims to provide a pore-scale picture of interface configuration induced by variations in the wetting characte

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9

Picardi, Robert N. "Numerical Analysis of Multiphase Flow in Bubble Columns and Applications for Microbial Fuel Cells." Thesis, Virginia Tech, 2015. http://hdl.handle.net/10919/51689.

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Computational fluid dynamics (CFD) modeling was used to predict the hydrodynamics of a column reactor. Bubble columns have applications across many engineering disciplines and improved modeling techniques help to increase the accuracy of numerical predictions. An Eulerian-Eulerian multi-fluid model was used to simulate fluidization and to capture the complex physics associated therewith. The commercial code ANSYS Fluent was used to study two-dimensional gas-liquid bubble columns. A comprehensive parameter study, including a detailed investigation of grid resolution was performed. Specific

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10

Yazici, Bora. "Numerical And Experimental Investigation Of Flow Through A Cavitating Venturi." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/3/12607924/index.pdf.

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Cavitating venturies are one of the simplest devices to use on a flow line to control the flow rate without using complex valve and measuring systems. It has no moving parts and complex electronic systems. This simplicity increases the reliability of the venturi and makes it a superior element for the military and critical industrial applications. Although cavitating venturis have many advantages and many areas of use, due to the complexity of the physics behind venturi flows, the characteristics of the venturies are mostly investigated experimentally. In addition, due to their military applic

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11

Alagbe, Solomon Oluyemi. "Experimental and numerical investigation of high viscosity oil-based multiphase flows." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/10495.

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Multiphase flows are of great interest to a large variety of industries because flows of two or more immiscible liquids are encountered in a diverse range of processes and equipment. However, the advent of high viscosity oil requires more investigations to enhance good design of transportation system and forestall its inherent production difficulties. Experimental and numerical studies were conducted on water-sand, oil-water and oilwater- sand respectively in 1-in ID 5m long horizontal pipe. The densities of CYL680 and CYL1000 oils employed are 917 and 916.2kg/m3 while their viscosities are 1.

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12

Choudhary, Aniruddha. "Verification of Compressible and Incompressible Computational Fluid Dynamics Codes and Residual-based Mesh Adaptation." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51169.

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Code verification is the process of ensuring, to the degree possible, that there are no algorithm deficiencies and coding mistakes (bugs) in a scientific computing simulation. In this work, techniques are presented for performing code verification of boundary conditions commonly used in compressible and incompressible Computational Fluid Dynamics (CFD) codes. Using a compressible CFD code, this study assesses the subsonic inflow (isentropic and fixed-mass), subsonic outflow, supersonic outflow, no-slip wall (adiabatic and isothermal), and inviscid slip-wall. The use of simplified curved surfac

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13

Silva, Marcela Kotsuka da. "Estudo numérico e experimental de uma coluna de bolhas operando em regime heterogêneo." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266911.

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Orientadores: Milton Mori, Marcos Akira d'Avila<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-17T21:18:36Z (GMT). No. of bitstreams: 1 Silva_MarcelaKotsukada_D.pdf: 43160482 bytes, checksum: b46a2b0225fdad527404b8c745e2f23b (MD5) Previous issue date: 2011<br>Resumo: Os principais problemas da simulação da fluidodinâmica em sistemas gás-líquido por CFD são as simplificações do comportamento dinâmico das bolhas. Na maioria dos processos industriais com escoamento gás-líquido em colunas de bolhas, as bolhas estão

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Hodapp, Maximilian Joachim. "Simulação trifásica por técnicas de CFD da combustão de carvão mineral em leito fluidizado circulante." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266662.

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Orientadores: Milton Mori, Jhon Jairo Ramirez Behainne<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T08:54:52Z (GMT). No. of bitstreams: 1 Hodapp_MaximilianJoachim_D.pdf: 4872915 bytes, checksum: 9619785faa8fc5ab19790d59903b0a7e (MD5) Previous issue date: 2012<br>Resumo: A queima de carvão mineral em Leito Fluidizado Circulante (CFBC) tem interessado pesquisadores por várias décadas, tendo sido propostos inúmeros modelos matemáticos que visam descrever os complexos fenômenos de transferência de massa, energi

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15

Barbosa, Ariane Corrêa. "Simulação de Reações de craqueamento catalítico e térmico em riser industrial." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266838.

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Orientador: Milton Mori<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-19T22:56:51Z (GMT). No. of bitstreams: 1 Barbosa_ArianeCorrea_M.pdf: 3646143 bytes, checksum: 81967e15123849d7596f2ba40c6b2c68 (MD5) Previous issue date: 2012<br>Resumo: O comportamento dinâmico de um reator industrial de FCC (Craqueamento Catalítico Fluidizado) foi simulado utilizando modelos de escoamento gás-solido tridimensionais e aplicando o modelo cinético de 10-lumps desenvolvido por JACOB et al. (1976). O comportamento uidodinâ

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Mori, Erick Djin. "Simulação de coluna de bolhas em leito de lama por técnicas da fluidodinâmica computacional." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266657.

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Orientadores: Milton Mori, Marcos Akra D'Ávila<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T08:49:15Z (GMT). No. of bitstreams: 1 Mori_ErickDjin_M.pdf: 2359279 bytes, checksum: ee684b815a4962d2a25990de40b76d0a (MD5) Previous issue date: 2012<br>Resumo: Escoamentos gás-líquido-sólido em colunas de bolhas ainda são pouco compreendidos pela comunidade científica. Conhecer melhor a hidrodinâmica em uma coluna de bolhas é condição primordial para o sucesso em seu dimensionamento. Se a natureza do escoament

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17

Dickenson, Paul. "Development of GPU-based incompressible SPH and application to sloshing problems in the oil industry." Thesis, University of Cambridge, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648452.

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18

Silva, Júnior João Lameu da 1986. "Investigação do escoamento bifásico gás-líquido em uma coluna de bolhas retangular por meio da técnica CFD." [s.n.], 2011. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266805.

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Orientador: Milton Mori<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-19T13:17:08Z (GMT). No. of bitstreams: 1 SilvaJunior_JoaoLameuda_M.pdf: 5288658 bytes, checksum: 05a82477d396e479ec1f137cc2682920 (MD5) Previous issue date: 2011<br>Resumo: Esta pesquisa tem como objetivo avaliar as principais forças interfaciais que atuam no escoamento gás-líquido em uma coluna de bolhas retangular, de dimensões 150cm x 26;4cm x 3;1cm (altura (H) x largura (W) x profundidade (D)), com aeração centralizada, empregando a

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Silva, Júnior João Lameu da 1986. "Modelagem e simulação fluidodinâmica de sistemas gás-líquido-sólido em leitos de lama usando CFD : síntese de metanol." [s.n.], 2015. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266016.

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Orientador: Milton Mori<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-27T18:43:17Z (GMT). No. of bitstreams: 1 SilvaJunior_JoaoLameuda_D.pdf: 4304757 bytes, checksum: 87ed8cbf9a1722317132a9054fbfd782 (MD5) Previous issue date: 2015<br>Resumo: Nesta pesquisa investigou-se numericamente as características fluidodinâmicas de colunas de bolhas em leito de lama operando sob diferentes regimes de escoamento e concentrações de sólido particulado empregando a técnica CFD. A síntese de metanol em duas etapas (carbonilaç

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20

Ghoma, Mohamed I. "The Effect of Wall Jet Flow on Local Scour Hole." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5501.

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This thesis reports on investigations carried out to study of the effect of horizontal wall jets on rough, fixed and mobile beds in open channel flow. Experimental tests were carried out, using fixed and mobile sediment beds. Computer simulation models for the flow within the jet and resulting sediment transport were developed and their results analysed in this study. In the experimental phase, tests were carried out with both fixed and mobile sediment beds. The shape of the water surface, numerous point velocity measurements and measurements of the evolving scour hole shape were made. Detail

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Iavarone, Salvatore. "Uncertainty Quantification for Scale-Bridging Modeling of Multiphase Reactive Flows." Doctoral thesis, Universite Libre de Bruxelles, 2019. https://dipot.ulb.ac.be/dspace/bitstream/2013/286344/5/contratSI.pdf.

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The use of Computational Fluid Dynamics (CFD) tools is crucial for the development of novel and cost-effective combustion technologies and the minimization of environmental concerns at industrial scale. CFD simulations facilitate scaling-up procedures that otherwise would be complicated by strong interactions between reaction kinetics, turbulence and heat transfer. CFD calculations can be applied directly at the industrial scale of interest, thus avoiding scaling-up from lab-scale experiments. However, this advantage can only be obtained if CFD tools are quantitatively predictive and trusted a

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Ghoma, Mohamed Ibrahem. "The effect of wall jet flow on local scour hole." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5501.

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This thesis reports on investigations carried out to study of the effect of horizontal wall jets on rough, fixed and mobile beds in open channel flow. Experimental tests were carried out, using fixed and mobile sediment beds. Computer simulation models for the flow within the jet and resulting sediment transport were developed and their results analysed in this study. In the experimental phase, tests were carried out with both fixed and mobile sediment beds. The shape of the water surface, numerous point velocity measurements and measurements of the evolving scour hole shape were made. Detaile

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23

Martins, Camila Almeida. "Simulação do perfil axial de pressão na coluna riser de um leito fluidizado circulante." Universidade Tecnológica Federal do Paraná, 2015. http://repositorio.utfpr.edu.br/jspui/handle/1/1970.

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Escoamentos gás-sólido em sistemas de leito fluidizado circulante são muito comuns em processos industriais, sendo objeto de pesquisa nos últimos anos pela sua natureza altamente complexa. O estudo de parâmetros inerentes às características fluidodinâmicas deste escoamento, como por exemplo, do perfil de pressão estática na coluna de fluidização rápida, pode mostrar o caminho para a prevenção de situações não desejadas em processos desenvolvidos na indústria química e de petróleo, bem como na geração de energia elétrica. Apesar da existência de vários trabalhos realizados sobre o assunto, é fr

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24

Grosche, Lucas Caetano. "Study of the interactions between emulsion flow and a spectrometer probe based on numerical simulations." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-17102014-114519/.

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In the present work, the flow behavior of an oil-in-water emulsion around and inside the measurement chamber of an in-line optical sensor probe is studied. The emulsion consists of a metalworking fluid, with oil droplets diameter ranging from 100 nanometers to 100 micrometers. The design of the UV-Vis light spectrometer probe is in accordance with the concept proposed in the research project named EPM (Emulsion Process Monitor in Metalworking Processes), carried out within the scope of the BRAGECRIM program between the University of São Paulo and the University of Bremen. This study is based o

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Kilimnik, Alexander. "Cross stream migration of compliant capsules in microfluidic channels." Thesis, Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/43669.

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An understanding of the motion of soft capsules in microchannels is useful for a number applications. This knowledge can be used to develop devices to sort biological cells based on their size and stiffness. For example, cancer cells have a different stiffness from healthy cells and thus can be readily identified. Additionally, devices can be developed to detect flaws in synthetic particles. Using a 3D hybrid lattice Boltzmann and lattice spring method, the motion of rigid and soft capsules in a pressure-driven microfluidic flow was probed. The effect of inertial drift is evaluated in channels

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Mokos, Athanasios Dorotheos. "Multi-phase modelling of violent hydrodynamics using Smoothed Particle Hydrodynamics (SPH) on Graphics Processing Units (GPUs)." Thesis, University of Manchester, 2014. https://www.research.manchester.ac.uk/portal/en/theses/multiphase-modelling-of-violent-hydrodynamics-using-smoothed-particle-hydrodynamics-sph-on-graphics-processing-units-gpus(a82b8187-f81a-400b-8bd2-9a74c502a953).html.

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This thesis investigates violent air-water flows in two and three dimensions using a smoothed particle hydrodynamics (SPH) model accelerated using the parallel architecture of graphics processing units (GPUs). SPH is a meshless Lagrangian technique for CFD simulations, whose major advantage for multi-phase flows is that the highly nonlinear behaviour of the motion of the interface can be implicitly captured with a sharp interface. However, prior to this thesis performing multi-phase simulations of large scale air-water flows has been prohibitive due to the inherent high computational cost. The

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Amritkar, Amit Ravindra. "Parallel implementation and application of particle scale heat transfer in the Discrete Element Method." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/51192.

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Dense fluid-particulate systems are widely encountered in the pharmaceutical, energy, environmental and chemical processing industries. Prediction of the heat transfer characteristics of these systems is challenging. Use of a high fidelity Discrete Element Method (DEM) for particle scale simulations coupled to Computational Fluid Dynamics (CFD) requires large simulation times and limits application to small particulate systems. The overall goal of this research is to develop and implement parallelization techniques which can be applied to large systems with O(105- 106) particles to investigat

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Silva, Andhros Guimarães. "Estudo numérico de escoamento bifásico anular utilizando ferramenta CFD." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-20062017-090942/.

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Uma das dificuldades relacionadas com a exploração de petróleo é o transporte de óleo pesado, que devido a sua alta viscosidade, acarreta em uma elevada perda de carga no sistema. Para proporcionar economia de energia aplica-se o método do Core Annular Flow (CAF) onde é utilizado um escoamento anular bifásico em que a água escoa na periferia da tubulação para redução do gasto energético. O presente trabalho visou compreender e reproduzir este fenômeno, desenvolvendo simulações em CFD através do pacote comercial ANSYS FLUENT considerando o escoamento 3D, turbulento, isotérmico e incompressível

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Grossberg, Shenan. "The optimisation of hydrodynamic vortex separators for removal of solids from wastewater, using the continuous adjoint method with topology modification." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/28756.

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Hydrodynamic vortex separators (HDVSs) are used in wastewater treatment to separate solids from wastewater. The aim of this research is to devise a CFD-based methodology that optimises their performance through modification of their design. A validation study is performed to assess whether OpenFOAM can be used to reliably model the flow of water in an HDVS. The results of the simulations are compared with experimental readings, showing a good fit when the appropriate boundary layer height and turbulence model are used. The continuous adjoint method is employed to derive the adjoint equations,

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Lopes, Gabriela Cantarelli. "Estudo computacional da dinâmica do escoamento reativo em risers industriais de FCC." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266768.

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Orientadores: José Roberto Nunhez, Milton Mori<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-19T13:23:00Z (GMT). No. of bitstreams: 1 Lopes_GabrielaCantarelli_D.pdf: 8625905 bytes, checksum: 794a296fe54b1d50d16cf187c232a454 (MD5) Previous issue date: 2012<br>Resumo: O craqueamento catalítico fluido (FCC) é um dos processos de maior importância da indústria do refino de petróleo, já que converte as frações pesadas de baixo valor comercial provenientes de outros processos de refino, em produtos comercialmente mai

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Sancet, Aitor. "Study of heat transfer and flow pattern in a multiphase fuel oil circular tank." Thesis, University of Gävle, University of Gävle, Department of Technology and Built Environment, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-4926.

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<p>This is a thesis work proposed by Sweco System in order to carry out a study related to the heating system of a circular fuel oil storage tank or cistern. The study tank is a 23m diameter and 18m height with a storage capacity of around 7500m3 of Eo5 heavy fuel oil. The content ought to be at a minimum storage temperature of 50ºC so that the fuel oil is fluid enough and operation labors can be adequately performed. In fact, these types of heavy fuel oils have fairly high viscosities at lower temperatures and the heating and pumping system can be compromised at temperatures below the pour po

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Justi, Gabriel Henrique. "Avaliação da transferência de quantidade de movimento, energia e das espécies químicas em um prato perfurado de destilação através da fluidodinâmica computacional." Universidade Federal de São Carlos, 2016. https://repositorio.ufscar.br/handle/ufscar/7416.

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Submitted by Regina Correa (rehecorrea@gmail.com) on 2016-09-21T20:17:28Z No. of bitstreams: 1 TeseGHJ.pdf: 12148265 bytes, checksum: 1180759f1c9f8691c3ce486239959cf5 (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-23T18:39:16Z (GMT) No. of bitstreams: 1 TeseGHJ.pdf: 12148265 bytes, checksum: 1180759f1c9f8691c3ce486239959cf5 (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-09-23T18:39:23Z (GMT) No. of bitstreams: 1 TeseGHJ.pdf: 12148265 bytes, checksum: 1180759f1c9f8691c3ce486239959cf5 (MD5)<br>Made available

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Deb, Surya D. "Investigation of fluidized bed systems using coupled DEM-CFD framework." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/52902.

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Fluidized beds have widespread industrial applications ranging from chemical industries to power plants. The flow inside a fluidized bed system consists of two main phases, a particle phase and the fluid phase. The two phases are strongly coupled to each other through various forces like drag and pressure. Capturing this multiphase phenomenon requires modeling strategies that possess good fidelity over a range of scales. Discrete Element Modeling (DEM) coupled with Computational Fluid Dynamics (CFD) provides a good platform to analyze the complex coupled multiphase hydrodynamics inside fluidiz

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Zerwas, Alexander Ariyoshi. "Modelagem e simulação do escoamento em um sistema de lavagem de gases por técnicas de fluidodinâmica computacional." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/3/3137/tde-14032017-143507/.

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Estudou-se a aplicação de uma modelagem RANS, com a utilização do modelo de turbulência k-? na modelagem do escoamento no interior de um sistema de lavagem de gases, composto por um lavador Venturi e uma coluna de spray, por técnicas de fluidodinâmica computacional (CFD), com a fase líquida resolvida pela abordagem Lagrangiana e a atomização secundária dessas por diferentes modelos de quebra. Utilizou-se o pacote comercial de CFD da ANSYS CFX 15.0 com as simulações realizadas em estado transiente. Verificaram-se os resultados obtidos pelo simulador para um lavador Venturi em escala piloto com

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González, Silva Germán. "Metodologia para aplicar LES ao craqueamento catalítico fluido em um reator riser industrial." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266671.

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Orientador: Milton Mori<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-21T06:39:27Z (GMT). No. of bitstreams: 1 GonzalezSilva_German_D.pdf: 4427269 bytes, checksum: bb45c122c3faad0613f060ad4cbd3b61 (MD5) Previous issue date: 2012<br>Resumo: O objetivo principal desta tese é propor uma metodologia para aplicar simulação de grandes escalas (LES) em uma unidade de craqueamento catalítico industrial. Para atingir este objetivo, iniciou-se propondo uma metodologia para a construção da malha, sendo uma malha quase-uni

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Hodapp, Maximilian Joachim. "Modelagem e simulação de um leito fluidizado : um estudo comparativo." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266452.

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Orientador: Milton Mori<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-12T20:09:08Z (GMT). No. of bitstreams: 1 Hodapp_MaximilianJoachim_M.pdf: 3485880 bytes, checksum: 79b4777bac2b444262795c5ddaaa44ac (MD5) Previous issue date: 2009<br>Resumo: O objetivo deste trabalho foi o estudo comparativo de duas modelagens para representação de um escoamento gás-sólido. Na primeira modelagem avaliou-se uma correlação de arraste apresentada recentemente na literatura, baseada em simulações lattice Boltzmann, aplicada

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Abbasi, Baharanchi Ahmadreza. "Development of a Two-Fluid Drag Law for Clustered Particles Using Direct Numerical Simulation and Validation through Experiments." FIU Digital Commons, 2015. http://digitalcommons.fiu.edu/etd/2489.

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This dissertation focused on development and utilization of numerical and experimental approaches to improve the CFD modeling of fluidization flow of cohesive micron size particles. The specific objectives of this research were: (1) Developing a cluster prediction mechanism applicable to Two-Fluid Modeling (TFM) of gas-solid systems (2) Developing more accurate drag models for Two-Fluid Modeling (TFM) of gas-solid fluidization flow with the presence of cohesive interparticle forces (3) using the developed model to explore the improvement of accuracy of TFM in simulation of fluidization flow of

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Azevedo, Victor Wagner Freire de. "Simula??o do escoamento multif?sico no interior de bombas de cavidades progressivas met?licas." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15688.

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Made available in DSpace on 2014-12-17T14:58:16Z (GMT). No. of bitstreams: 1 VictorWFA_DISSERT.pdf: 4406666 bytes, checksum: 17531cab6caf785a3e82578d15d0e5d9 (MD5) Previous issue date: 2012-11-05<br>The progressing cavity pumping (PCP) is one of the most applied oil lift methods nowadays in oil extraction due to its ability to pump heavy and high gas fraction flows. The computational modeling of PCPs appears as a tool to help experiments with the pump and therefore, obtain precisely the pump operational variables, contributing to pump s project and field operation otimization in the respecti

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Singh, Sukhjinder. "Large Eddy Simulations of Sand Transport and Deposition in the Internal Cooling Passages of Gas Turbine Blades." Diss., Virginia Tech, 2014. http://hdl.handle.net/10919/56613.

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Jet engines often operate under dirty conditions where large amounts of particulate matter can be ingested, especially, sand, ash and dirt. Particulate matter in different engine components can lead to degradation in performance. The objective of this dissertation is to investigate sand transport and deposition in the internal cooling passages of turbine blades. A simplified rectangular geometry is simulated to mimic the flow field, heat transfer and particle transport in a two pass internal cooling geometry. Two major challenges are identified while trying to simulate particle deposition. Fir

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Bansal, Akshay. "Comportement inclusionnaire dans un bain d’aluminium brassé par induction." Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0090.

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Dans le secteur aéronautique, la performance des alliages d’aluminium connait une amélioration continue, grâce notamment à l’optimisation des procédés d’élaboration. Dans ce cadre, le travail de recherche vise à prédire le comportement des inclusions dans un bain d’aluminium brassé par induction afin d’améliorer la propreté inclusionnaire des alliages coulés. Un modèle numérique a été développé pour simuler le comportement magnétohydrodynamique du bain d’aluminium dans le creuset suivi par la modélisation du comportement d’une population d’inclusions non-métalliques. Le modèle 2D axisymétrique

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Àlvarez, Castro Helver Crispiniano 1984. "Análise de variáveis de processo via CFD visando aperfeiçoamento de performance em riser de FCC." [s.n.], 2014. http://repositorio.unicamp.br/jspui/handle/REPOSIP/266067.

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Orientador: Milton Mori<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Química<br>Made available in DSpace on 2018-08-26T06:44:29Z (GMT). No. of bitstreams: 1 AlvarezCastro_HelverCrispiniano_D.pdf: 5280150 bytes, checksum: 96fb29e2849d11c06890186cb8af2f51 (MD5) Previous issue date: 2014<br>Resumo: Conversão de matéria-prima e rendimento são estudados através de um modelo 3D que simula o principal reator do processo de craqueamento catalítico fluidizado (FCC). Fluidodinâmica computacional (CFD) é usada como técnica com abordagem Euleriana-Euleriana para preve

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Imada, Fabiano Hikoji Jorge. "Estudo da estrutura multidimensional de escoamentos multifásicos em dispositivos de medição de pressão diferencial." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/3/3150/tde-19032015-171034/.

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A medição de vazão de escoamentos multifásicos é uma necessidade constante em diversas atividades industriais como exploração de óleo e gás, controle de linhas de transporte de vapor e monitoramento de sistemas de resfriamento de usinas nucleares. Dentre os meios disponíveis para a realização da medição de vazão mássica, os dispositivos de medição de pressão diferencial constituem um dos métodos mais simples, sendo sua construção, aplicação e operação em escoamentos monofásicos bem conhecidas e definidas por normas técnicas. No entanto, sua aplicação tem sido estendida a escoamentos multifásic

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Vosskuhle, Michel. "Particle collisions in turbulent flows." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2013. http://tel.archives-ouvertes.fr/tel-00946618.

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Cette thèse est consacrée au mécanisme conduisant à des taux de collisions importants dans les suspensions turbulentes de particules inertielles. Le travail a été effectué en suivant numériquement des particules, par simulations directes des équations de Navier-Stokes, et également par étude de modèles simplifiés. Les applications de ce domaine sont nombreuses aussi bien dans un contexte industriel que naturel (astrophysique, géophysique). L'approximation des collisions fantômes (ACF), souvent utilisée pour déterminer les taux de collision numériquement, consiste à compter dans une simulation,

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Casel, Brian(Brian Scott). "Improved turbulent lift momentum closure for multiphase computational fluid dynamics." Thesis, Massachusetts Institute of Technology, 2020. https://hdl.handle.net/1721.1/129889.

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Thesis: S.M., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, February, 2020<br>Cataloged from student-submitted PDF of thesis.<br>Includes bibliographical references (pages 63-65).<br>More efficient boiling heat transfer systems in nuclear reactors can help lower the costs of a large, low carbon energy source. Multiphase computational fluid dynamics (M-CFD) can be utilized in the design of these systems, but requires additional modeling for interphase transfer of mass, momentum, and energy [1]. Within the momentum transfer between phases, the interfacial

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Little, Sylvia Bandy. "Multiphase flow through porous media." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/11779.

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Kardos, T. N. "Modelling Smoke Flow Using Computational Fluid Dynamics." University of Canterbury. Civil Engineering, 1996. http://hdl.handle.net/10092/8278.

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There have been a number of experimental investigations into the backdraft phenomena. A backdraft occurs in the event of a ventilation source being formed in a compartment, within which a fire has been burning for a sufficiently long enough time to form a deep layer of excess pyrolyzates. The source of fresh air will flow into the compartment in the form of a gravity current. It is the gravity current feature of backdrafts that this research project focuses on. Application of Computational Fluid Dynamics (CFD) to fire problems is expanding, including the development of specific programs for f

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Sugrue, Rosemary M. "A robust momentum closure approach for multiphase computational fluid dynamics applications." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/113718.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2017.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (pages [183]-190).<br>Multiphase computational fluid dynamics (M-CFD) modeling approaches allow for the prediction of critical three-dimensional thermal-hydraulics phenomena in nuclear reactor applications. The advancement and consistent adopti

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Liu, Li. "Computational fluid dynamics modelling of complex fluid flow in stirred vessels." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4753/.

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Fluid mixing in stirred vessels is widely encountered in a number of industries. In this work, different experimental techniques and the CFD modelling approach are used to measure the mixing of a wide range of fluids in stirred vessels. As the detailed validation is essential for CFD modelling, CFD predictions are compared in detail with different experimental measurements. The capability of CFD modelling of the 3D spatial distribution of velocity and solid concentration within opaque concentrated solid-liquid suspensions with the mean solid concentration up to 40 wt% is assessed by comparing

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Molale, Dimpho Millicent. "A computational evaluation of flow through porous media." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/686.

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Henderson, Jason. "Investigation of cavity flow aerodynamics using computational fluid dynamics." Thesis, University of Glasgow, 2001. http://theses.gla.ac.uk/3483/.

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Open cavity flow is that of most interest to researchers. The flow is typical to that found to exist in the bomb bay of the F-111 and is characterised by intense acoustic levels. A review of the work of previous experimental researchers is included for comparison with the findings of the present thesis. The flow physics indicate that a series of vortices travel downstream in the cavity and are driven by vorticity generated at the upstream lip of the cavity. When strengthened the downstream moving vortex influences the mass addition and expulsion at the trailing edge initiating a pressure wave

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