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Relevant bibliographies by topics / Computational fluid dynamics; Wave loading / Dissertations / Theses

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Dissertations / Theses on the topic 'Computational fluid dynamics; Wave loading'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Saalehi, Ahmad. "Quadtree-based finite element modelling of laminar separated flow past a cylinder." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308908.

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2

Chun, Sangeon. "Nonlinear Fluid-Structure Interaction in a Flexible Shelter under Blast Loading." Diss., Virginia Tech, 2004. http://hdl.handle.net/10919/29849.

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Recently, numerous flexible structures have been employed in various fields of industry. Loading conditions sustained by these flexible structures are often not described well enough for engineering analyses even though these conditions are important. Here, a flexible tent with an interior Collective Protection System, which is subjected to an explosion, is analyzed. The tent protects personnel from biological and chemical agents with a pressurized liner inside the tent as an environmental barrier. Field tests showed unexpected damage to the liner, and most of the damage occurred on tent's

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3

Yang, Guodong. "Cartesian mesh techniques for moving body problems and shock wave modelling." Thesis, Manchester Metropolitan University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.360893.

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4

Horko, Michael. "CFD optimisation of an oscillating water column wave energy converter." University of Western Australia. School of Mechanical Engineering, 2008. http://theses.library.uwa.edu.au/adt-WU2008.0089.

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Although oscillating water column type wave energy devices are nearing the stage of commercial exploitation, there is still much to be learnt about many facets of their hydrodynamic performance. This research uses the commercially available FLUENT computational fluid dynamics flow solver to model a complete OWC system in a two dimensional numerical wave tank. A key feature of the numerical modelling is the focus on the influence of the front wall geometry and in particular the effect of the front wall aperture shape on the hydrodynamic conversion efficiency. In order to validate the numerical

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5

Kalsi, Hardeep Singh. "Numerical modelling of shock wave boundary layer interactions in aero-engine intakes at incidence." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/284394.

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Aero-engine intakes play a critical role in the performance of modern high-bypass turbofan engines. It is their function to provide uniformly distributed, steady air flow to the engine fan face under a variety of flow conditions. However, during situations of high incidence, high curvature of the intake lip can accelerate flow to supersonic speeds, terminating with a shock wave. This produces undesirable shock wave boundary layer interactions (SWBLIs). Reynolds-Averaged Navier Stokes (RANS) turbulence models have been shown to be insensitive to the effects of boundary layer relaminarisation pr

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6

Raj, Piyush. "Influence of Fuel Inhomogeneity and Stratification Length Scales on Detonation Wave Propagation in a Rotating Detonation Combustor (RDC)." Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103185.

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The detonation-based engine has the key advantage of increased thermodynamic efficiency over the traditional constant pressure combustor. These detonation-based engines are also known as Pressure Gain Combustion systems (PGC) and Rotating Detonation Combustor (RDC) is a form of PGC, in which the detonation wave propagates azimuthally around an annular combustor. Prior researchers have performed a high fidelity 3-D numerical simulation of a rotating detonation combustor (RDC) to understand the flow physics such as detonation wave velocity, pressure profile, wave structure; however, performing t

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7

Medina-López, Encarnación. "Thermodynamic processes involved in wave energy extraction." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/31422.

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Wave energy is one of the most promising renewable energy sources for future exploitation. This thesis focuses on thermodynamic effects within Oscillating Water Column (OWC) devices equipped withWells turbines, particularly humidity effects. Previous theoretical studies of the operation of OWCs have resulted in expressions for the oscillation of the water surface in the chamber of an OWC based on linear wave theory, and the air expansion{compression cycle inside the air chamber based on ideal gas theory. Although in practice high humidity levels occur in OWC devices open to the sea, the influe

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8

Krus, Kristofer. "Wave Model and Watercraft Model for Simulation of Sea State." Thesis, Linköpings universitet, Teoretisk Fysik, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-102959.

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The problem of real-time simulation of ocean surface waves, ship movement and the coupling in between is tackled, and a number of different methods are covered and discussed. Among these methods, the finite volume method has been implemented in an attempt to solve the problem, along with the compressible Euler equations, an octree based staggered grid which allows for easy adaptive mesh refinement, the volume of fluid method and a variant of the Hyper-C advection scheme for compressible flows for advection of the phase fraction field. The process of implementing the methods that were chosen pr

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9

Waindim, Mbu. "On Unsteadiness in 2-D and 3-D Shock Wave/Turbulent Boundary Layer Interactions." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1511734224701396.

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10

加藤, 由博, Yoshihiro KATO, Igor MEN'SHOV, 佳朗中村 та Yoshiaki NAKAMURA. "非圧縮性流れ場と音場に分離された方程式による円柱まわりの空力音の計算". 日本機械学会, 2005. http://hdl.handle.net/2237/9088.

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11

加藤, 由博, Yoshihiro KATO, Igor MEN'SHOV, 佳朗中村 та Yoshiaki NAKAMURA. "地面板上の角柱から発生する空力音の計算". 日本機械学会, 2006. http://hdl.handle.net/2237/9090.

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12

Zakrzewski, Sam Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "A Numerical and Experimental Investigation of High-Speed Liquid Jets - Their Characteristics and Dynamics." Awarded by:University of New South Wales. Mechanical and Manufacturing Engineering, 2002. http://handle.unsw.edu.au/1959.4/18653.

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A comprehensive understanding of high-speed liquid jets is required for their introduction into engine and combustion applications. Their transient nature, short lifetime, unique characteristics and the inability to take many experimental readings, has inhibited this need. This study investigates the outflow of a high-speed liquid jet into quiescent atmospheric air. The key characteristics present are, a bow shock wave preceding the jet head, an enhanced mixing layer and the transient deformation of the liquid jet core. The outflow regime is studied in an experimental and numerical manner. In

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13

Li, Zhisong. "Advanced Computational Modeling for Marine Tidal Turbine Farm." University of Cincinnati / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1337889611.

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14

加藤, 由博, Yoshihiro KATO, Igor MEN'SHOV, 佳朗中村 та Yoshiaki NAKAMURA. "自動車のドアミラーから発生する空力音の計算". 日本機械学会, 2006. http://hdl.handle.net/2237/13862.

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15

Drazin, William. "Blast propagation and damage in urban topographies." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/274900.

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For many years, terrorism has threatened life, property and business. Targets are largely in urban areas where there is a greater density of life and economic value. Governments, insurers and engineers have sought to mitigate these threats through understanding the effects of urban bombings, increasing the resilience of buildings and improving estimates of financial loss for insurance purposes. This has led to a desire for an improved approach to the prediction of blast propagation in urban cityscapes. Urban geometry has a significant impact on blast wave propagation. Presently, only computati

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16

Higuera, Caubilla Pablo. "Aplicación de la dinámica de fluidos computacional a la acción del oleaje sobre estructuras . Application of computational fluid dynamics to wave action on structures." Doctoral thesis, Universidad de Cantabria, 2015. http://hdl.handle.net/10803/288368.

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El diseño de estructuras costeras se fundamenta tradicionalmente en dos pilares: formulaciones semiempíricas y modelado físico a escala reducida. El modelado numérico, introducido recientemente en este campo, puede ayudar en el proceso de diseño, como una herramienta avanzada complementaria a las técnicas nombradas. En esta tesis se presenta IHFOAM, un modelo numérico tridimensional nuevo para la simulación de procesos de transformación del oleaje y de interacción con las estructuras. Para ello se detalla el proceso de desarrollo de todos los elementos que permiten la aplicación en este campo.

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17

Ackerman, Paul Henry. "Air turbine design study for a wave energy conversion system." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4270.

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18

Khan, Muhammad Ahsan. "CFD Applications for Wave Energy Conversion Devices (MoonWEC) and Turbulent Fountains for Environmental Fluid Mechanics." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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This thesis is based on two studies that are related to floating wave energy conversion (WEC) devices and turbulent fountains. The ability of the open-source CFD software OpenFOAM® has been studied to simulate these phenomena. The CFD model has been compared with the physical experimental results. The first study presents a model of a WEC device, called MoonWEC, which is patented by the University of Bologna. The CFD model of the MoonWEC under the action of waves has been simulated using OpenFOAM and the results are promising. The reliability of the CFD model is confirmed by the laboratory ex

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19

Owowo, Julius. "Simulation, measurement and detection of leakage and blockage in fluid pipeline systems." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/simulation-measurement-and-detection-of-leakage-and-blockage-in-fluid-pipeline-systems(f165fb02-a6fb-4063-a63d-3caa129c29f4).html.

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Leakage and blockage of oil and gas pipeline systems, water pipelines, pipe-work of process plants and other pipe networks can cause serious environmental, health and economic problems. There are a number of non-destructive testing (NDT) methods for detecting these defects in pipeline systems such as radiographic, ultrasonic, magnetic particle inspection, pressure transient and acoustic wave methods. In this study, the acoustic wave method and a modal frequency technique, which based on a roving mass method, are used. The aim of the thesis is to employ acoustic wave propagation based methods i

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20

Velez, Carlos Alberto Busto. "CFD analysis of a uni-directional impulse turbine for wave energy conversion." Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4714.

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Ocean energy research has grown in popularity in the past decade and has produced various designs for wave energy extraction. This thesis focuses on the performance analysis of a uni-directional impulse turbine for wave energy conversion. Uni-directional impulse turbines can produce uni-directional rotation in bi-directional flow, which makes it ideal for wave energy extraction as the motion of ocean waves are inherently bi-directional. This impulse turbine is currently in use in four of the world's Oscillating Wave Columns (OWC). Current research to date has documented the performance of the

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21

Sousa, Alves Joao. "Experimental and CFD Analysis of a Biplane Wells Turbine for Wave Energy Harnessing." Thesis, KTH, Mekanik, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-124070.

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Several alternative ways of producing energy came up as the world took conscience of the finite availability of fossil fuels and the environmental consequences of its use and processing. Wave and tidal energy are among the so called green energies. Wave energy converters have been under research for the past two decades and yet there hasn’t been one technology that gathered everyone’s acceptance as being the most suitable one. The present work is focused on a self-rectifying turbine for wave energy harnessing. It’s a self-rectifying biplane Wells with an intermediate stator. The main goal is t

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22

Sakib, Salman. "Design Optimization and Field Performance Evaluation of the Wave Suppression and Sediment Collection (WSSC) System| Computational Fluid Dynamics (CFD) Modeling, Surface Elevation Table (SET) Survey, and Marker Clay Study." Thesis, University of Louisiana at Lafayette, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10618338.

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<p> Coastal erosion is an issue of concern for Louisiana, in the United States, and for all other coastal communities in the world. Among many coastal protection and restoration technologies, shoreline protection structures focus on wave reductions to prevent waves from hitting the coastal landforms directly. A novel technology called the Wave Suppression and Sediment Collection (WSSC) system focuses on solving the limitations of conventional shoreline protection structures regarding mobility, constructability, and sustainability. The primary goals of this study are to optimize the WSSC units

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23

Kuechler, Sebastian. "Wave Propagation in an Elastic Half-Space with Quadratic Nonlinearity." Thesis, Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19823.

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This study investigates wave propagation in an elastic half-space with quadratic nonlinearity due to a line load on the surface. The consideration of this problem is one of the well known Lamb problems. Even since Lamb's original solution, numerous investigators have obtained solutions to many different variants of the Lamb problem. However, most of the solutions existing in the current literature are limited to wave propagation in a linear elastic half-space. In this work, the Lamb problem in an elastic half-space with quadratic nonlinearity is considered. For this, the problem is first formu

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24

Dean, Cayla Whitney. "Turbulent and Electromagnetic Signature of Small- and Fine-scale Biological and Oceanographic Processes." Diss., NSUWorks, 2018. https://nsuworks.nova.edu/occ_stuetd/492.

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Small- and fine-scale biological and oceanographic processes may have a measurable electromagnetic signature. These types of processes inherently involve turbulence and three-dimensional dynamics. Traditional models of the electromagnetic signature of oceanographic processes are of an analytical nature, do not account for three-dimensional boundary layer dynamics or turbulence, self-inductance, and may not describe the variety of the environmental conditions occurring in the ocean. In order to address this problem, I have implemented magnetohydrodynamic (MHD) computational fluid dynamics (CFD)

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25

McCallum, Peter Duncan. "Numerical methods for modelling the viscous effects on the interactions between multiple wave energy converters." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/28906.

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The vast and rich body of literature covering the numerical modelling of hydrodynamic floating body systems has demonstrated their great power and versatility when applied to offshore marine energy systems. It is possible to model almost any type of physical phenomenon which could be expected within such a system, however, limitations of computing power continue to restrict the usage of the most comprehensive models to very narrow and focused design applications. Despite the continued evolution of parallel computing, one major issue that users of computational tools invariably face is how to s

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26

Wood, Dylan M. "Finite Element Modeling for Assessing Flood Barrier Risks and Failures due to Storm Surges and Waves." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1595572799377091.

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27

Dombre, Emmanuel. "Modélisation non-linéaire des interactions vague-structure appliquée à des flotteurs d'éoliennes off-shore." Thesis, Paris Est, 2015. http://www.theses.fr/2015PEST1050/document.

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Cette thèse est consacrée à l'étude numérique des interactions non-linéaires entre des vagues et un corps rigide perçant la surface libre. La méthode développée repose sur un modèle d'éléments de frontière qui réduit la dimensionnalité du problème d'une dimension. Dans un premier temps, un modèle2D est appliqué à des géométries simples et permet de démontrer la pertinence de l'approche envisagée pour la prédiction des mouvements d'une structure flottante soumise à des vagues monochromatiques régulières. Dans un second temps, en nous inspirant d'un modèle potentiel non-linéaire 3D développé par

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28

Ravikumar, Devaki. "2D Compressible Viscous Flow Computations Using Acoustic Flux Vector Splitting (AFVS) Scheme." Thesis, Indian Institute of Science, 2001. http://hdl.handle.net/2005/277.

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The present work deals with the extension of Acoustic Flux Vector Splitting (AFVS) scheme for the Compressible Viscous flow computations. Accurate viscous flow computations require much finer grids with adequate clustering of grid points in certain regions. Viscous flow computations are performed on unstructured triangulated grids. Solving Navier-Stokes equations involves the inviscid Euler part and the viscous part. The inviscid part of the fluxes are computed using the Acoustic Flux Vector Splitting scheme and the viscous part which is diffusive in nature does not require upwinding and is ta

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29

(6620447), Yen-Chen Chiang. "Studies on Aboveground Storgae Tanks Subjeected to Wind Loading: Static, Dynamic, and Computational Fluid Dynamics Analyses." Thesis, 2019.

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<p>Due to the slender geometries of aboveground storage tanks, maintaining the stability under wind gusts of these tanks has always been a challenge. Therefore, this thesis aims to provide a through insight on the behavior of tanks under wind gusts using finite element analysis and computational fluid dynamic (CFD) analysis. The present thesis is composed of three independent studies, and different types of analysis were conducted. In Chapter 2, the main purpose is to model the wind loading dynamically and to investigate whether a resonance can be triggered. Research on tanks subjected to stat

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30

Bovard, Luke. "Short-wave vortex instabilities in stratified flow." Thesis, 2013. http://hdl.handle.net/10012/8097.

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Density stratification is one of the essential underlying physical mechanisms for atmospheric and oceanic flow. As a first step to investigating the mechanisms of stratified turbulence, linear stability plays a critical role in determining under what conditions a flow remains stable or unstable. In the study of transition to stratified turbulence, a common vortex model, known as the Lamb-Chaplygin dipole, is used to investigate the conditions under which stratified flow transitions to turbulence. Numerous investigations have determined that a critical length scale, known as the buoyancy lengt

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31

(11022453), Akshay Deshpande. "Unsteady Dynamics of Shock-Wave Boundary-Layer Interactions." Thesis, 2021.

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<div>Shock-wave/turbulent boundary-layer interactions (SWTBLIs) are characterized by low-frequency unsteadiness, amplified aerothermal loads, and a complex three-dimensional flowfield. Presence of a broad range of length and time-scales associated with compressible turbulence generates additional gasdynamic features that interact with different parts of the flowfield via feedback mechanisms. Determining the physics of such flows is of practical importance as they occur frequently in different components of a supersonic/hypersonic aircraft such as inlets operating in both on- and off-design con

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32

Kishor, Dubasi Krishna. "Novel Finite Element Formulations For Dynamics Of Acoustic Fluids." Thesis, 2010. http://etd.iisc.ernet.in/handle/2005/1984.

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Fluid-structure interaction (FSI) as the name suggests, is the study of dynamic interaction of both fluid and structure motions. Fluid-structure interaction exists in almost all engineering and science fields. Moreover, the random loading caused by fluid motions in uncertain environment conditions present new challenges to the designers. The objective of the present research work is to develop efficient and robust finite element models to solve fluid structure interaction problems effectively. A key advantage of the displacement based FE M is the flexibility and easiness in modifying the exist

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33

Lee, Curtis. "A New Method for Modeling Free Surface Flows and Fluid-structure Interaction with Ocean Applications." Diss., 2016. http://hdl.handle.net/10161/12894.

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<p>The computational modeling of ocean waves and ocean-faring devices poses numerous challenges. Among these are the need to stably and accurately represent both the fluid-fluid interface between water and air as well as the fluid-structure interfaces arising between solid devices and one or more fluids. As techniques are developed to stably and accurately balance the interactions between fluid and structural solvers at these boundaries, a similarly pressing challenge is the development of algorithms that are massively scalable and capable of performing large-scale three-dimensional simulat

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34

Obed, Samuelraj I. "Micro-Blast Waves." Thesis, 2011. http://hdl.handle.net/2005/2375.

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The near field blast–wave propagation dynamics has been a subject of intense research in recent past. Since experiments on a large scale are difficult to carry out, focus has been directed towards recreating these blast waves inside the laboratory by expending minuscule amounts of energy(few joules),which have been termed here as micro–blast waves. In the present study, micro-blast waves are generated from the open end of a small diameter polymer tube (Inner Diameter of 1.3 mm)coated on its inner side with negligible amounts of HMX explosive (~18 mg/m), along with traces of aluminium powder. E

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35

Zingan, Valentin Nikolaevich. "Discontinuous Galerkin Finite Element Method for the Nonlinear Hyperbolic Problems with Entropy-Based Artificial Viscosity Stabilization." Thesis, 2012. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-10845.

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This work develops a discontinuous Galerkin finite element discretization of non- linear hyperbolic conservation equations with efficient and robust high order stabilization built on an entropy-based artificial viscosity approximation. The solutions of equations are represented by elementwise polynomials of an arbitrary degree p > 0 which are continuous within each element but discontinuous on the boundaries. The discretization of equations in time is done by means of high order explicit Runge-Kutta methods identified with respective Butcher tableaux. To stabilize a numerical solution in the

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