Modelling Of Flow In Vertical Porous Structures Solving The Reynolds Averaged Navier Stokes Equations Rans Using The Volume Of Fluid Method Vof
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Modelling Of Flow In Vertical Porous Structures Solving The Reynolds Averaged Navier Stokes Equations Rans Using The Volume Of Fluid Method Vof
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Author : Stefan Leschka
language : en
Publisher: diplom.de
Release Date : 2002-05-30
Modelling Of Flow In Vertical Porous Structures Solving The Reynolds Averaged Navier Stokes Equations Rans Using The Volume Of Fluid Method Vof written by Stefan Leschka and has been published by diplom.de this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002-05-30 with Technology & Engineering categories.
Inhaltsangabe:Abstract: In this thesis the simulation of the flow in alpha vertical permeable structure with alpha free surface is described. The underlying physical data had been achieved from experiments in a wave flume at the University of Cantabria. For the calibration of the numerical model COBRAS, a VOF type programme developed at Cornell University, the numerical results are compared with the laboratory data. The data analysed comes from 8 free surface sensors, placed inside and outside of the porous structure, and 4 pressure sensors, placed on the impermeable back wall inside the porous structure. An error analysis, using the least square technique, lead to a stepwise improvement of the numerical and the porous media parameters. In this process various grids had been tested, concerning sponge layer length, source function position and cell size. Later the porous media parameter for laminar and turbulent flow had been adjusted. For various wave conditions and porous structure characteristics, the optimal values for these parameters turned out to lay between 0 and 200 for alpha and between 0.45 and 0.8 for beta. The following error analysis yielded to alpha=100 and beta=0.5 usable for all tested wave and porous media characteristics. Inhaltsverzeichnis:Table of Contents: 1.Introduction1 1.1General Introduction1 1.2Aims of study3 1.3Contents3 2.Numerical Modelling5 2.1Introduction5 2.2Overview of Numerical Models for Wave prediction6 2.3Numerical Models for Simulation of Flow in porous media7 2.3.1Overview of mathematical solutions7 2.3.2Available numerical models for porous media flow8 2.4The COBRAS Model9 2.4.1Overview9 2.4.2Governing Equations for the Mean Flow9 2.4.2.1Flow Motion Formulation9 2.4.2.1.1Navier-Stokes Equations and Boundary Conditions9 2.4.2.1.2Reynolds Equations and Boundary Conditions12 2.4.2.2Turbulence Transport Model14 2.4.2.2.1Transport Equation for Turbulent Kinetic Energy, k14 2.4.2.2.2The Transport Equation for Turbulent Dissipation Rate, F15 2.4.2.2.3Assumptions and Determinations of Coefficients in the k-s Model 16 2.4.2.2.4Boundary Conditions for k and s19 2.4.2.3Summary of Governing Equations19 2.4.3Modelling of Flow in Porous Media20 2.4.4The Volume of Fluid Method25 2.4.5The Source Function27 2.4.6The Sponge Layer28 2.4.7Numerical Algorithm30 2.5Closing comment31 3.Vertical Permeable Structures32 3.1Introduction32 3.2Motivation of the Experiments34 3.3Overview of the [...]
Nonlinear Wave Dynamics
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Author : Patrick Lynett
language : en
Publisher: World Scientific
Release Date : 2009
Nonlinear Wave Dynamics written by Patrick Lynett and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Science categories.
In September 2006, research leaders in the field of coastal engineering, fluid mechanics, and wave theory met at Cornell University to celebrate the 60th birthday of Prof. Philip L-F Liu. This volume is a compilation of the research papers presented at the symposium, and includes both review and new research papers. Topics such as nonlinear wave theory, tsunamis, wave-structure interaction, turbulence, and modeling of complex sediment transport are discussed in this volume. All of the contributing authors are research collaborators of Prof. Liu, and include leaders in coastal engineering such as Maarten Dingemans, Hwung-Hweng Hwung, Nobu Kobayashi, Inigo Losada, Hocine Oumeraci, Costas Synolakis, and Harry Yeh.
Coastal Structures 2007 In 2 Volumes Proceedings Of The 5th Coastal Structures International Conference Cst07
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Author : Alberto Lamberti
language : en
Publisher: World Scientific
Release Date : 2009-06-09
Coastal Structures 2007 In 2 Volumes Proceedings Of The 5th Coastal Structures International Conference Cst07 written by Alberto Lamberti and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-06-09 with Technology & Engineering categories.
Coastal Structures are undergoing renewal and innovation to better serve the needs of our society - from environmental co-existence and habitat enhancement to risk management. The CSt07 conference is the fifth in a series that highlight significant progress in the innovation, design and construction of coastal structures. Proceedings of these CSt conferences have yielded milestone works, frequently cited references in the field.This two-volume proceedings contains the final revised version of 178 papers that have been reviewed, selected and discussed at the CSt07 conference. The volume brings to readers a comprehensive range of contributions, covering all aspects of research, design, construction, and maintenance of coastal structures including new up-to-date interesting topics, such as tsunamis and storm surge defences, climate change, piled coastal structures as well as ecological issues, a new addition to the traditional program.
Transfer Phenomena In Fluid And Heat Flows X
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Author : Luiz Alberto Oliveira Rocha
language : en
Publisher: Trans Tech Publications Ltd
Release Date : 2019-08-16
Transfer Phenomena In Fluid And Heat Flows X written by Luiz Alberto Oliveira Rocha and has been published by Trans Tech Publications Ltd this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-08-16 with Technology & Engineering categories.
Special topic volume with invited peer reviewed papers only
Renewable Energies Offshore
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Author : C. Guedes Soares
language : en
Publisher: CRC Press
Release Date : 2015-09-07
Renewable Energies Offshore written by C. Guedes Soares and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-09-07 with Technology & Engineering categories.
Renewable Energies Offshore includes the papers presented in the 1st International Conference on Renewable Energies Offshore (RENEW2014), held in Lisbon, 24-26 November 2014. The conference is a consequence of the importance of the offshore renewable energies worldwide and an opportunity to contribute to the exchange of information on the dev
Ocean Engineering Research Advances
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Author : Alan I. Prescott
language : en
Publisher: Nova Publishers
Release Date : 2008
Ocean Engineering Research Advances written by Alan I. Prescott and has been published by Nova Publishers this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Science categories.
Ocean engineering is the branch of engineering concerned with the design, analysis and operation planning of systems that operate in an oceanic environment. Examples of systems range from oil platforms to submarines, from breakwaters to sailboats. Common to all are the conditions of the ocean including waves, seawater, and hydrostatic pressure. The ocean environment presents a vast quantity of renewable sources of energy in the form of winds, waves, tides, currents and the density and thermal gradients between ocean water layers. This book presents leading-edge research in ocean engineering.
Turbulent Flow Modeling And Solution
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Author : David Eduardo Aljure Osorio
language : en
Publisher:
Release Date : 2016
Turbulent Flow Modeling And Solution written by David Eduardo Aljure Osorio and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
The study of turbulent flow crucial for current engineering aplications. The Navier-Stokes equations describe the fluid behaviour in a general way, however due to its nature, its solution is quite complex. Computer fluid dynamics make use of numerical methods to construct a model and approximate the solution of the equations in different flow configurations. Different turbulence modelling techniques, Reynoldsaveraged Navier-Stokes simulations (RANS), large-eddy simnulations (LES) and direct numerical simulations (DNS), and examples of flow geometries solved with each method are presented. This numerical approach is then applied investigation works on relevant flow geometries.
Nonlinear Free Surface Flow Modeling Using Volume Of Fluid Vof Method
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Author : Ziping Dai
language : en
Publisher:
Release Date : 2003
Nonlinear Free Surface Flow Modeling Using Volume Of Fluid Vof Method written by Ziping Dai and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Fluid dynamics categories.
Modelling Of Two Phase Flow In Porous Media With Volume Of Fluid Method
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Author : Bertrand Lagree
language : en
Publisher:
Release Date : 2014
Modelling Of Two Phase Flow In Porous Media With Volume Of Fluid Method written by Bertrand Lagree and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.
Understanding multiphase flow in porous media is of tremendous importance for many industrial and environmental applications at various spatial and temporal scales. The present study consequently focuses on modelling multiphase flows by the Volume-of-Fluid method in porous media and shows simulations of Saffman-Taylor fingering motivated by the analysis of waterflooding experiments of extra-heavy oils in quasi-2D square slab geometries of Bentheimer sandstone. The Gerris code which allows efficient parallel computations with octree mesh refinement is used. It is tested for accuracy and computational speed using several levels of refinement and comparing to reference simulations in the literature. Simulations of real rocks are realised in three dimensions with very promising results. Though it is not yet possible to attain realistic capillary numbers, it is possible to simulate flows in domains of physical size up to 1 mm3 in reasonable CPU time. 2D simulations of viscous fingering with both central and lateral injection are also presented in this study, based on Darcy's law. The fractal aspect of this fingering is studied by considering both its fractal dimension and the variation of the area of the resulting pattern with respect to its arclength. Finally, polymer flooding following waterflooding in a two-step process is simulated with Darcy modelling.
High Speed Flow Calculations Past 3 D Configurations Based On The Reynolds Averaged Navier Stokes Equations
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Author :
language : en
Publisher:
Release Date : 1988
High Speed Flow Calculations Past 3 D Configurations Based On The Reynolds Averaged Navier Stokes Equations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.