Reflection and Transmission from Porous Structures Under Oblique Wave Attack PDF Download

Author: Robert A. Dalrymple
Publisher:
ISBN:
Category : Hydrodynamics
Languages : en
Pages : 64

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Author: Stefan Leschka
Publisher: diplom.de
ISBN: 3832454691
Category : Technology & Engineering
Languages : en
Pages : 104

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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 [...]

Author: Nguyen Trung Viet
Publisher: Springer Nature
ISBN: 9811502919
Category : Science
Languages : en
Pages : 1419

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This book presents selected articles from the International Conference on Asian and Pacific Coasts (APAC 2019), an event intended to promote academic and technical exchange on coastal related studies, including coastal engineering and coastal environmental problems, among Asian and Pacific countries/regions. APAC is jointly supported by the Chinese Ocean Engineering Society (COES), the Coastal Engineering Committee of the Japan Society of Civil Engineers (JSCE), and the Korean Society of Coastal and Ocean Engineers (KSCOE). APAC is jointly supported by the Chinese Ocean Engineering Society (COES), the Coastal Engineering Committee of the Japan Society of Civil Engineers (JSCE), and the Korean Society of Coastal and Ocean Engineers (KSCOE).

Author: John Harris
Publisher: CRC Press
ISBN: 149878285X
Category : Technology & Engineering
Languages : en
Pages : 1154

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Scour and Erosion includes four keynote lectures from world leading researchers cutting across the themes of scour and erosion, together with 132 peer-reviewed papers from 34 countries, covering the principal themes of: - internal erosion - sediment transport - grain scale to continuum scale - advanced numerical modelling of scour and erosion - terrestrial scour and erosion- river and estuarine erosion including scour around structures, and - management of scour/erosion and sediment, including hazard management and sedimentation in dams and reservoirs. Scour and Erosion is ideal for researchers and industry working at the forefront of scour and erosion, and has applications in both the freshwater and marine environments.

Author: David M Kelly
Publisher: CRC Press
ISBN: 1351119524
Category : Technology & Engineering
Languages : en
Pages : 376

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This book will serve as a reference guide, and state-of-the-art review, for the wide spectrum of numerical models and computational techniques available to solve some of the most challenging problems in coastal engineering. The topics covered in this book, are explained fundamentally from a numerical perspective and also include practical examples applications. Important classic themes such as wave generation, propagation and breaking, turbulence modelling and sediment transport are complemented by hot topics such as fluid and structure interaction or multi-body interaction to provide an integral overview on numerical techniques for coastal engineering. Through the vision of 10 high impact authors, each an expert in one or more of the fields included in this work, the chapters offer a broad perspective providing several different approaches, which the readers can compare critically to select the most suitable for their needs. Advanced Numerical Modelling of Wave Structure Interaction will be useful for a wide audience, including PhD students, research scientists, numerical model developers and coastal engineering consultants alike.

Author:
Publisher: Thomas Telford
ISBN: 9780727716729
Category : Technology & Engineering
Languages : en
Pages : 596

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This book presents authoritative research on new experience in the field of coastal structures and breakwaters, particularly that which has led to advances in design procedures. It brings together the experience of an international authorship to cover the design and construction of coastal structures, particularly recent developments, the magnitude and effects of longer-term environmental changes, and the assessment of these structures and their relative safety.

Author: K. Murali
Publisher: Springer
ISBN: 9811331340
Category : Technology & Engineering
Languages : en
Pages : 911

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This book comprises selected proceedings of the Fourth International Conference in Ocean Engineering (ICOE2018), focusing on emerging opportunities and challenges in the field of ocean engineering and offshore structures. It includes state-of-the-art content from leading international experts, making it a valuable resource for researchers and practicing engineers alike.

Author: Vladimir A. Polyanskiy
Publisher: Springer Nature
ISBN: 3030930769
Category : Technology & Engineering
Languages : en
Pages : 646

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This book presents a collection of papers prepared by the researches of the Institute for Problems in Mechanical Engineering of the Russian Academy of Sciences (IPME RAS) on the occasion of the 30th anniversary of the establishment of the Institute. The IPME RAS is one of the leading research institutes of the Russian Academy of Sciences and consists of 18 research units (laboratories). The chapters cover the main research directions of the institute, including nano-,micro-, meso- and macro- mechanics and materials, with ,special emphasis on the problems of strength of materials and service life of structures.

Author: Pengzhi Lin
Publisher: CRC Press
ISBN: 1482265915
Category : Technology & Engineering
Languages : en
Pages : 500

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Modelling large-scale wave fields and their interaction with coastal and offshore structures has become much more feasible over the last two decades with increases in computer speeds. Wave modelling can be viewed as an extension of wave theory, a mature and widely published field, applied to practical engineering through the use of computer tools.

Author: Yoshimitsu Tajima
Publisher: Springer Nature
ISBN: 9819974097
Category :
Languages : en
Pages : 1102

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