Cfd Simulations Of Marine Hydrodynamics
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Cfd Simulations Of Marine Hydrodynamics
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Author : Yigit Kemal Demirel
language : en
Publisher: Mdpi AG
Release Date : 2021-11-09
Cfd Simulations Of Marine Hydrodynamics written by Yigit Kemal Demirel and has been published by Mdpi AG this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-09 with Technology & Engineering categories.
CFD is an emerging area and is gaining popularity due to the availability of ever-increasing computational power. If used accurately, CFD methods may overcome the limitations of experimental and other numerical methods, in some respects. This Special Issue focuses on Computational Fluid Dynamics (CFD) Simulations of Marine Hydrodynamics with a specific focus on the applications of naval architecture and ocean engineering, and it comprises 24 original articles that advance state-of-the-art CFD applications in marine hydrodynamics and/or review the progress and future directions of research in this field. The published articles cover a wide range of subjects relevant to naval architecture and ocean engineering, including but not limited to; ship resistance and propulsion, seakeeping and maneuverability, hydrodynamics of marine renewable energy devices, validation and verification of computational fluid dynamics (CFD), EFD/CFD combined methods, fouling/coating hydrodynamics.
Practical Ship Hydrodynamics
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Author : Volker Bertram
language : en
Publisher: Elsevier
Release Date : 2012
Practical Ship Hydrodynamics written by Volker Bertram and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Science categories.
Practical Ship Hydrodynamics provides a comprehensive overview of hydrodynamic experimental and numerical methods for ship resistance and propulsion, maneuvering, seakeeping and vibration. Beginning with an overview of problems and approaches, including the basics of modeling and full scale testing, expert author Volker Bertram introduces the marine applications of computational fluid dynamics and boundary element methods. Expanded and updated, this new edition includes: Otherwise disparate information on the factors affecting ship hydrodynamics, combined to provide one practical, go-to resource. Full coverage of new developments in computational methods and model testing techniques relating to marine design and development. New chapters on hydrodynamic aspects of ship vibrations and hydrodynamic options for fuel efficiency, and increased coverage of simple design estimates of hydrodynamic quantities such as resistance and wake fraction. With a strong focus on essential background for real-life modeling, this book is an ideal reference for practicing naval architects and graduate students.
Advances In Marine Hydrodynamics
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Author : M. Ohkusu
language : en
Publisher: Computational Mechanics
Release Date : 1996
Advances In Marine Hydrodynamics written by M. Ohkusu and has been published by Computational Mechanics this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with Science categories.
Numerical Ship Hydrodynamics
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Author : Lars Larsson
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-09-30
Numerical Ship Hydrodynamics written by Lars Larsson and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-30 with Technology & Engineering categories.
This book assesses the state-of-the-art in computational fluid dynamics (CFD) applied to ship hydrodynamics and provides guidelines for the future developments in the field based on the Gothenburg 2010 Workshop. It presents ship hull test cases, experimental data and submitted computational methods, conditions, grids and results. Analysis is made of errors for global (resistance, sinkage and trim and self-propulsion) and local flow (wave elevations and mean velocities and turbulence) variables, including standard deviations for global variables and propeller modeling for self-propulsion. The effects of grid size and turbulence models are evaluated for both global and local flow variables. Detailed analysis is made of turbulence modeling capabilities for capturing local flow physics. Errors are also analyzed for head-wave seakeeping and forward speed diffraction, and calm-water forward speed-roll decay. Resistance submissions are used to evaluate the error and uncertainty by means of a systematic verification and validation (V&V) study along with statistical investigations. Post-workshop experimental and computational studies are conducted and analyzed for evaluation of facility biases and to draw more concrete conclusions regarding the most reliable turbulence model, appropriate numerical methods and grid resolution requirements, respectively.
Computational Fluid Dynamics Cfd Simulation Of A Gas Solid Fluidized Bed Residence Time Validation Study
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Author : Baru Debtera
language : en
Publisher: GRIN Verlag
Release Date : 2021-11-29
Computational Fluid Dynamics Cfd Simulation Of A Gas Solid Fluidized Bed Residence Time Validation Study written by Baru Debtera and has been published by GRIN Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-29 with Science categories.
Academic Paper from the year 2021 in the subject Physics - Mechanics, , language: English, abstract: In this study, numerical simulations of a gas-solid fluidized bed reactor involving a two-fluid Eulerian multiphase model and incorporating the Kinetic Theory of Granular Flow (KTGF) for the solids phase have been performed using a commercial Computational Fluid Dynamics (CFD) software. The fluidized bed setup consists of 1,5 m height and 0,2 m diameter in which a series of experiments were performed using Helium tracer to determine the Residence Time Distribution (RTD) at various normalized velocities i.e., with different degrees of gas-solids mixing. Both 2D and 3D simulations of the fluidized bed reactor are performed. The main purpose of this study is to understand the hydrodynamic behavior of a gas-solid fluidized bed reactor through a framework of Eulerian multiphase model and to analyze hydrodynamic behavior of the gas-solids mixing.
Marine Hydrodynamics 40th Anniversary Edition
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Author : J. N. Newman
language : en
Publisher: MIT Press
Release Date : 2018-01-26
Marine Hydrodynamics 40th Anniversary Edition written by J. N. Newman and has been published by MIT Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-01-26 with Technology & Engineering categories.
A textbook that offers a unified treatment of the applications of hydrodynamics to marine problems. The applications of hydrodynamics to naval architecture and marine engineering expanded dramatically in the 1960s and 1970s. This classic textbook, originally published in 1977, filled the need for a single volume on the applications of hydrodynamics to marine problems. The book is solidly based on fundamentals, but it also guides the student to an understanding of engineering applications through its consideration of realistic configurations. The book takes a balanced approach between theory and empirics, providing the necessary theoretical background for an intelligent evaluation and application of empirical procedures. It also serves as an introduction to more specialized research methods. It unifies the seemingly diverse problems of marine hydrodynamics by examining them not as separate problems but as related applications of the general field of hydrodynamics. The book evolved from a first-year graduate course in MIT's Department of Ocean Engineering. A knowledge of advanced calculus is assumed. Students will find a previous introductory course in fluid dynamics helpful, but the book presents the necessary fundamentals in a self-contained manner. The 40th anniversary of this pioneering book offers a foreword by John Grue. Contents Model Testing • The Motion of a Viscous Fluid • The Motion of an Ideal Fluid • Lifting Surfaces • Waves and Wave Effects • Hydrodynamics of Slender Bodies
Cfd And Cad In Ship Design
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Author : Gerard Oortmerssen
language : en
Publisher: Elsevier Publishing Company
Release Date : 1990
Cfd And Cad In Ship Design written by Gerard Oortmerssen and has been published by Elsevier Publishing Company this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Technology & Engineering categories.
In the field of hydrodynamics, various methods have been developed for the prediction of calm water resistance and manoeuvring characteristics. These methods range from rather simple empirical methods to very advanced Computational Fluid Dynamics (CFD). In ship design, Computer Aided Design (CAD) applications mainly focus on the description of the geometry of the ship and the calculation of hydrostatic properties. Considerable attention has been given to drawing systems and connectivity to systems for supporting the production process of ships - Computer Aided Manufacturing (CAM). This volume reviews the rapid advances that have been made in computer applications to ship hydrodynamics and ship design, due to developments in the performance of computer hardware. Special attention is paid to the integration of hydrostatic calculations in ship design software offering new possibilities to ship designers for optimizing the design of ships.
Cfd Modeling Of Complex Chemical Processes
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Author : Li Xi
language : en
Publisher: MDPI
Release Date : 2021-09-01
Cfd Modeling Of Complex Chemical Processes written by Li Xi and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-09-01 with Technology & Engineering categories.
Computational fluid dynamics (CFD), which uses numerical analysis to predict and model complex flow behaviors and transport processes, has become a mainstream tool in engineering process research and development. Complex chemical processes often involve coupling between dynamics at vastly different length and time scales, as well as coupling of different physical models. The multiscale and multiphysics nature of those problems calls for delicate modeling approaches. This book showcases recent contributions in this field, from the development of modeling methodology to its application in supporting the design, development, and optimization of engineering processes.
Mathematical Modeling Of Inland Vessel Maneuverability Considering Rudder Hydrodynamics
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Author : Jialun Liu
language : en
Publisher: Springer Nature
Release Date : 2020-05-11
Mathematical Modeling Of Inland Vessel Maneuverability Considering Rudder Hydrodynamics written by Jialun Liu and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-05-11 with Technology & Engineering categories.
This book demonstrates that different rudder configurations have different hydrodynamic characteristics, which are influenced by the profile, the parameters, and the specific configuration. The author proposes new regression formulas to help naval architects quickly estimate the rudder-induced forces and moments in maneuvering. Furthermore, the author proposes and validates an integrated maneuvering model for both seagoing ships and inland vessels. Using the proposed regression formulas and maneuvering model, the specific impacts of rudder configurations on inland vessel maneuverability are studied. In turn, the book demonstrates the application of Reynolds-Averaged Navier–Stokes (RANS) simulations to obtain rudder hydrodynamic characteristics, and the integration of the RANS results into maneuvering models as an accurate estimation of rudder forces and moments needed to quantify the impacts of rudder configurations on ships’ maneuvering performance. In addition, the author proposes new criteria for the prediction and evaluation of inland vessel maneuverability. Simulations of ships with various rudder configurations are presented, in order to analyze the impacts of rudder configurations on ship maneuverability in different classic and proposed test maneuvers. Offering essential guidance on the effects of rudders for inland vessel maneuverability, and helping practical engineers make informed design choices, the book is of interest to researchers and academics in the field of naval engineering, as well as students of naval architecture. Industrial practitioners working on ship design may also find it beneficial.
Numerical Modeling Prediction Of Ship Maneuvering And Hydrodynamics During Inland Waterway Transport
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Author : Peng Du
language : en
Publisher:
Release Date : 2022-01-20
Numerical Modeling Prediction Of Ship Maneuvering And Hydrodynamics During Inland Waterway Transport written by Peng Du and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-01-20 with categories.
In this work, ship hydrodynamics during inland waterway transport and ship maneuvering are investigated using CFD (Computational Fluid Dynamics) based on OpenFoam. Validation and verification studies are carried out for the mesh convergence, time step convergence, sensitivity to turbulence models and dynamic mesh techniques. A quaternion-based 6DoF motion solver is implemented for the trim and sinkage predictions. Environmental effects on several inland vessels (convoy 1, convoy 2, tanker) are studied using the validated numerical models. Three important aspects, the confinement effect of the waterway, head-on encounter, and ship-bridge pile interaction are simulated. The testing conditions cover a wide range, including various channel dimensions, water depths, ship draughts and speeds. The ship resistance, wave pattern, Kelvin angle and wave elevation at specific positions are investigated as functions of these parameters. Ship maneuvering is investigated using virtual captive model tests based on the MMG (Mathematical Maneuvering Group) model. An actuator disk is implemented to replace the real propeller. Open water test, rudder force test, OTT (Oblique Towing Tank test) and CMT (Circular Motion Test) of a KVLCC2 model are carried out to obtain the hydrodynamic coefficients of the propeller, rudder and ship hull. Using the obtained coefficients, system-based maneuvering simulations are carried out and validated using the free running test data. These studies reproduce real ship tests and thus prove the validity of our numerical models. As a result, the numerical solver is promising in ship hydrodynamics and marine engineering simulations.
