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Marine 2011, IV International Conference on Computational Methods in Marine Engineering : Selected Papers.

By: Eça, Luís.
Contributor(s): Oñate, Eugenio | García-Espinosa, Julio | Kvamsdal, Trond | Bergan, Pål.
Material type: TextTextSeries: eBooks on Demand.Computational Methods in Applied Sciences Ser: Publisher: Dordrecht : Springer, 2013Copyright date: ©2013Edition: 1st ed.Description: 1 online resource (278 pages).Content type: text Media type: computer Carrier type: online resourceISBN: 9789400761438.Subject(s): Marine engineering -- Congresses.;Marine machinery -- CongressesGenre/Form: Electronic books.Additional physical formats: Print version:: Marine 2011, IV International Conference on Computational Methods in Marine Engineering : Selected PapersDDC classification: 623.87 LOC classification: TA1-2040Online resources: Click here to view this ebook.
Contents:
Intro -- MARINE 2011, IV International Conference on Computational Methods in Marine Engineering -- Preface -- Contents -- Part I: CFD for Offshore Applications -- Viscous-Flow Calculations for Model and Full-Scale Current Loads on Typical Offshore Structures -- 1 Introduction -- 2 De nitions -- 3 Measurements -- 3.1 LNG Carrier -- 3.2 Semi-submersible -- 4 Computational Setup -- 4.1 Computational Grids -- 4.2 Boundary and Initial Conditions -- 4.3 ReFRESCO -- 4.4 Veri cation and Validation Procedures -- 5 Results for LNG Carrier -- 5.1 Iterative Convergence -- 5.2 Numerical Uncertainties -- 5.3 Validation with Model-Scale Experiments -- 5.4 Scale Effects -- 6 Results for Semi-submersible -- 6.1 Iterative Convergence -- 6.2 Numerical Uncertainties -- 6.3 Validation with Model-Scale Experiments -- 6.4 Scale Effects -- 6.5 Unsteady Calculations -- 7 Conclusions and Future Work -- References -- An Absorbing Boundary Condition for Regular and Irregular Wave Simulations -- 1 Introduction -- 2 Statement of the Problem -- 3 Absorbing Boundary Condition (ABC) -- 3.1 Numerical Algorithm -- 4 Results and Discussions -- 4.1 Results of the Regular Wave Simulation -- 4.2 Results of the Irregular Wave Simulation -- 5 Concluding Remarks -- References -- Part II: Fluid-Structure Interaction -- Free-Surface Flow and Fluid-Object Interaction -- 1 Introduction -- 2 Formulation -- 2.1 Mesh-Dependent Parameters -- 3 Computational Results -- 3.1 The MARIN Dam Break Problem -- 3.2 Fridsma Planing Hull -- 3.2.1 Hull De nition -- 3.2.2 Mesh Convergence Study -- 3.2.3 Effect of Hull Speed -- 4 Conclusions -- References -- The Particle Finite Element Method (PFEM). An Effective Numerical Technique for Solving Marine, Naval and Harbour Engineering Problems -- 1 Introduction -- 2 The Basis of the Particle Finite Element Method -- 2.1 Basic Steps of the PFEM.
3 FIC/FEM Formulation for a Lagrangian Continuum -- 3.1 Governing Equations -- 3.2 Discretization of the Equations -- 4 Generation of a New Mesh -- 5 Identi cation of Boundary Surfaces -- 6 Treatment of Contact Conditions in the PFEM -- 6.1 Contact Between the Fluid and a Fixed Boundary -- 6.2 Contact Between Solid-Solid Interfaces -- 7 Modeling of Bed Erosion -- 8 Examples -- 8.1 Dragging of Rocks by a Water Stream -- 8.2 Impact of Sea Waves on Piers and Breakwaters -- 8.3 Soil Erosion Problems -- 8.4 Falling of a Lorry into the Sea by Sea Wave Erosion of the Road Slope -- 8.5 Impact of Waves over Transport Vehicles in Harbour -- 8.6 Simulation of Sinking of Ships -- 8.7 Collision of Boat with Ice Blocks -- 9 Conclusions -- References -- Part III: Isogeometric Methods for Marine Engineering -- Shape-Newton Method for Isogeometric Discretizations of Free-Boundary Problems -- 1 Introduction -- 2 Free-Boundary Problem -- 2.1 Strong Form -- 2.2 Very Weak Form -- 3 Linearizing Free-Boundary Problems -- 3.1 Linearization with Respect to u -- 3.2 Hadamard Shape Derivatives -- 3.3 Shape Linearization -- 4 Newton-Like Schemes -- 4.1 Coupled Scheme -- 4.2 Decoupled Scheme -- 5 Numerical Experiments -- 5.1 Isogeometric-Analysis Based Discretizations -- 5.2 Testcase I: Parabolic Free-Boundary -- 5.3 Testcase II: Free-Surface Flow over a Bump -- 6 Concluding Remarks -- References -- Part IV: Marine/Offshore Renewable Energy -- Enabling Computational Methods for Offshore Wind Turbines -- 1 Introduction -- 2 Enabling Computational Technology -- 2.1 Isogeometric Analysis -- 2.2 Variational Multiscale Methods for Fluids and Turbulence -- 2.3 Free-Surface Flow -- 2.4 IGA Modeling of Thin Structures -- 2.5 Free-Surface Modeling on Moving Spatial Domains -- 2.6 FSI Methods and Coupling -- 2.7 Sliding-Interface Formulation for Objects in Relative Motion.
3 Computational Results -- 3.1 FSI Simulations of a 5 MW Offshore Wind Turbine -- 3.2 DTMB 5415 Navy Combatant in Head Waves -- 4 Conclusions -- References -- Advances in the Development of a Time-Domain Unstructured Finite Element Method for the Analysis of Waves and Floating Structures Interaction -- 1 Introduction -- 2 Problem Statement -- 2.1 Governing Equations -- 2.2 Velocity Potential Decomposition -- 2.3 Radiation Condition and Wave Absorption -- 3 Finite Element Formulation -- 3.1 Boundary Conditions -- 3.2 Body Dynamics -- 3.3 Free Surface Boundary Condition for OWC Calculations -- 4 Numerical Results -- 4.1 Waves Refracted by a Vertical Circular Cylinder -- 4.2 Seakeeping of a GVA 4000 Semisubmersible Platform -- 4.3 Oscillating Water Column Test -- 5 Conclusions -- References -- The Variation in Wake Structure of a Tidal Stream Turbine with Flow Velocity -- 1 Introduction -- 2 The BEM-CFD Model -- 2.1 Governing Equations -- 2.2 Blade Element Momentum Method -- 2.3 Computational Solution -- 2.4 De nitions -- 3 Results and Discussion -- 3.1 Simulations -- 3.2 Downstream Velocity De cit -- 3.3 Lateral Velocity De cit Pro les -- 3.4 Wake Diameter Pro les -- 4 Conclusion -- References -- Part V: Maneuvering and Seakeeping -- Viscous-Flow Calculations for KVLCC2 in Deep and Shallow Water -- 1 Introduction -- 2 Coordinate System -- 3 KVLCC2 -- 4 Viscous Flow Solver and Computational Setup -- 4.1 ReFRESCO -- 4.2 Turbulence Closure Models -- 4.3 Implementation of Rotational Motion -- 4.4 Grid Generation -- 4.5 Boundary Conditions -- 4.6 Acceleration of the Calculations -- 5 Programme of Calculations -- 6 Presentation and Discussion of the Results -- 6.1 Iterative Error -- 6.2 Discretisation Error -- 6.3 Comparison with the Experiments -- 6.3.1 Manoeuvring Conditions -- 6.3.2 Straight Ahead Sailing -- 6.4 In uence of Water Depth.
6.4.1 Forces and Moments -- 6.4.2 Form Factor -- 6.5 Local Quantities -- 7 Conclusions -- References -- Computational Investigation of Non-body-of-Revolution Hull Form Maneuvering Characteristics -- 1 Introduction -- 2 Numerical Methods -- 3 Grid Generation -- 4 Force and Moment Computations -- 5 Steady Turn Results -- 6 Stability Indices -- 7 Conclusions -- References -- Part VI: Propulsion and Cavitation -- Numerical Prediction of Erosive Collapse Events in Unsteady Compressible Cavitating Flows -- 1 Introduction -- 2 Underlying Numerical Model -- 3 Modeling and Implementation of Erosion Indicators and Collapse Detectors -- 4 Results -- 5 Conclusions -- References -- Numerical and Experimental Investigation into Propulsion and Cavitation Performance of Marine Propeller -- 1 Introduction -- 2 Numerical Model -- 2.1 Transitional Flow Simulation -- 2.2 Cavitating Flow Simulation -- 2.3 Numerical Grids -- 3 Numerical Simulation of Propeller Open Characteristics -- 3.1 Propeller Open Characteristics -- 3.2 Transitional Flow Simulation -- 3.3 Scale Effects of Propeller Open Characteristics -- 4 Numerical Simulation of Cavitating Flow -- 4.1 Experimental Data of Partially Eroded Propeller -- 4.2 Numerical Evaluation of Cavitation Erosion Risk -- 4.3 Pressure Pulse Evaluation -- 5 Conclusions -- References -- Advanced Lagrangian Approaches to Cavitation Modelling in Marine Applications -- 1 Introduction -- 2 Numerical Method -- 2.1 Governing Equations -- 3 Euler-Euler Cavitation Model -- 3.1 Cavitating Hydrofoil Flow -- 3.2 Cavitating Flow over the PPTC Propeller -- 4 Euler-Lagrange Cavitation Model -- 4.1 Hybrid MPI/OpenMP Parallelization -- 4.2 Cavitating Hydrofoil Flow -- 4.3 Cavitating Flow over the PPTC Propeller -- 5 Combined Euler-Euler/Euler-Lagrange Cavitation Model -- 5.1 Cavitating Flow over the PPTC Propeller -- 6 Conclusions -- References.
Part VII: Ship Hydrodynamics -- CFD in Ship Hydrodynamics-Results of the Gothenburg 2010 Workshop -- 1 Introduction -- 2 Hulls -- 3 Test Cases -- 4 Participants and Methods -- 5 Selected Results -- 5.1 Resistance -- 5.2 Self-propulsion -- 5.3 Wave Pattern -- 5.4 Local Flow (Steady Case) -- 5.5 Heave and Pitch -- 5.6 Roll Decay at Forward Speed -- 6 Conclusions -- References -- Prediction of the Transom Flow Regime with Viscous Free Surface Computations -- 1 Introduction -- 2 The Computational Method -- 2.1 RANS Solver -- 2.2 Free-Surface Treatment -- 2.3 Grids Suited for Both Dry and Wetted Transom -- 2.4 Grid Density -- 3 Grid Dependence Studies and Comparison with Experiments -- 4 Scale Effects on the Free Surface -- 5 Conclusions -- References -- Anisotropic Mesh Re nement in Ship Flow Simulation with Free Surface -- 1 Introduction -- 2 Finite-Volume Method -- 3 Grid Re nement Procedure -- 3.1 Anisotropic Re nement -- 3.2 Tensor Re nement Criteria -- 4 The Need for Combined Re nement Criteria -- 5 Pressure Hessian-Free Surface Criterion -- 5.1 Free-Surface Criterion -- 5.2 Pressure Hessian -- 5.3 The Combined Criterion -- 6 Test Cases -- 6.1 Prism Impacting on a Water Surface -- 6.2 Immersed NACA0012 Wing -- 6.3 Series 60 Wave Pattern -- 7 Conclusion -- References.
Summary: This book contains selected papers from the Fourth International Conference on Computational Methods in Marine Engineering, held at Instituto Superior Técnico, Technical University of Lisbon, Portugal in September 2011.
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Intro -- MARINE 2011, IV International Conference on Computational Methods in Marine Engineering -- Preface -- Contents -- Part I: CFD for Offshore Applications -- Viscous-Flow Calculations for Model and Full-Scale Current Loads on Typical Offshore Structures -- 1 Introduction -- 2 De nitions -- 3 Measurements -- 3.1 LNG Carrier -- 3.2 Semi-submersible -- 4 Computational Setup -- 4.1 Computational Grids -- 4.2 Boundary and Initial Conditions -- 4.3 ReFRESCO -- 4.4 Veri cation and Validation Procedures -- 5 Results for LNG Carrier -- 5.1 Iterative Convergence -- 5.2 Numerical Uncertainties -- 5.3 Validation with Model-Scale Experiments -- 5.4 Scale Effects -- 6 Results for Semi-submersible -- 6.1 Iterative Convergence -- 6.2 Numerical Uncertainties -- 6.3 Validation with Model-Scale Experiments -- 6.4 Scale Effects -- 6.5 Unsteady Calculations -- 7 Conclusions and Future Work -- References -- An Absorbing Boundary Condition for Regular and Irregular Wave Simulations -- 1 Introduction -- 2 Statement of the Problem -- 3 Absorbing Boundary Condition (ABC) -- 3.1 Numerical Algorithm -- 4 Results and Discussions -- 4.1 Results of the Regular Wave Simulation -- 4.2 Results of the Irregular Wave Simulation -- 5 Concluding Remarks -- References -- Part II: Fluid-Structure Interaction -- Free-Surface Flow and Fluid-Object Interaction -- 1 Introduction -- 2 Formulation -- 2.1 Mesh-Dependent Parameters -- 3 Computational Results -- 3.1 The MARIN Dam Break Problem -- 3.2 Fridsma Planing Hull -- 3.2.1 Hull De nition -- 3.2.2 Mesh Convergence Study -- 3.2.3 Effect of Hull Speed -- 4 Conclusions -- References -- The Particle Finite Element Method (PFEM). An Effective Numerical Technique for Solving Marine, Naval and Harbour Engineering Problems -- 1 Introduction -- 2 The Basis of the Particle Finite Element Method -- 2.1 Basic Steps of the PFEM.

3 FIC/FEM Formulation for a Lagrangian Continuum -- 3.1 Governing Equations -- 3.2 Discretization of the Equations -- 4 Generation of a New Mesh -- 5 Identi cation of Boundary Surfaces -- 6 Treatment of Contact Conditions in the PFEM -- 6.1 Contact Between the Fluid and a Fixed Boundary -- 6.2 Contact Between Solid-Solid Interfaces -- 7 Modeling of Bed Erosion -- 8 Examples -- 8.1 Dragging of Rocks by a Water Stream -- 8.2 Impact of Sea Waves on Piers and Breakwaters -- 8.3 Soil Erosion Problems -- 8.4 Falling of a Lorry into the Sea by Sea Wave Erosion of the Road Slope -- 8.5 Impact of Waves over Transport Vehicles in Harbour -- 8.6 Simulation of Sinking of Ships -- 8.7 Collision of Boat with Ice Blocks -- 9 Conclusions -- References -- Part III: Isogeometric Methods for Marine Engineering -- Shape-Newton Method for Isogeometric Discretizations of Free-Boundary Problems -- 1 Introduction -- 2 Free-Boundary Problem -- 2.1 Strong Form -- 2.2 Very Weak Form -- 3 Linearizing Free-Boundary Problems -- 3.1 Linearization with Respect to u -- 3.2 Hadamard Shape Derivatives -- 3.3 Shape Linearization -- 4 Newton-Like Schemes -- 4.1 Coupled Scheme -- 4.2 Decoupled Scheme -- 5 Numerical Experiments -- 5.1 Isogeometric-Analysis Based Discretizations -- 5.2 Testcase I: Parabolic Free-Boundary -- 5.3 Testcase II: Free-Surface Flow over a Bump -- 6 Concluding Remarks -- References -- Part IV: Marine/Offshore Renewable Energy -- Enabling Computational Methods for Offshore Wind Turbines -- 1 Introduction -- 2 Enabling Computational Technology -- 2.1 Isogeometric Analysis -- 2.2 Variational Multiscale Methods for Fluids and Turbulence -- 2.3 Free-Surface Flow -- 2.4 IGA Modeling of Thin Structures -- 2.5 Free-Surface Modeling on Moving Spatial Domains -- 2.6 FSI Methods and Coupling -- 2.7 Sliding-Interface Formulation for Objects in Relative Motion.

3 Computational Results -- 3.1 FSI Simulations of a 5 MW Offshore Wind Turbine -- 3.2 DTMB 5415 Navy Combatant in Head Waves -- 4 Conclusions -- References -- Advances in the Development of a Time-Domain Unstructured Finite Element Method for the Analysis of Waves and Floating Structures Interaction -- 1 Introduction -- 2 Problem Statement -- 2.1 Governing Equations -- 2.2 Velocity Potential Decomposition -- 2.3 Radiation Condition and Wave Absorption -- 3 Finite Element Formulation -- 3.1 Boundary Conditions -- 3.2 Body Dynamics -- 3.3 Free Surface Boundary Condition for OWC Calculations -- 4 Numerical Results -- 4.1 Waves Refracted by a Vertical Circular Cylinder -- 4.2 Seakeeping of a GVA 4000 Semisubmersible Platform -- 4.3 Oscillating Water Column Test -- 5 Conclusions -- References -- The Variation in Wake Structure of a Tidal Stream Turbine with Flow Velocity -- 1 Introduction -- 2 The BEM-CFD Model -- 2.1 Governing Equations -- 2.2 Blade Element Momentum Method -- 2.3 Computational Solution -- 2.4 De nitions -- 3 Results and Discussion -- 3.1 Simulations -- 3.2 Downstream Velocity De cit -- 3.3 Lateral Velocity De cit Pro les -- 3.4 Wake Diameter Pro les -- 4 Conclusion -- References -- Part V: Maneuvering and Seakeeping -- Viscous-Flow Calculations for KVLCC2 in Deep and Shallow Water -- 1 Introduction -- 2 Coordinate System -- 3 KVLCC2 -- 4 Viscous Flow Solver and Computational Setup -- 4.1 ReFRESCO -- 4.2 Turbulence Closure Models -- 4.3 Implementation of Rotational Motion -- 4.4 Grid Generation -- 4.5 Boundary Conditions -- 4.6 Acceleration of the Calculations -- 5 Programme of Calculations -- 6 Presentation and Discussion of the Results -- 6.1 Iterative Error -- 6.2 Discretisation Error -- 6.3 Comparison with the Experiments -- 6.3.1 Manoeuvring Conditions -- 6.3.2 Straight Ahead Sailing -- 6.4 In uence of Water Depth.

6.4.1 Forces and Moments -- 6.4.2 Form Factor -- 6.5 Local Quantities -- 7 Conclusions -- References -- Computational Investigation of Non-body-of-Revolution Hull Form Maneuvering Characteristics -- 1 Introduction -- 2 Numerical Methods -- 3 Grid Generation -- 4 Force and Moment Computations -- 5 Steady Turn Results -- 6 Stability Indices -- 7 Conclusions -- References -- Part VI: Propulsion and Cavitation -- Numerical Prediction of Erosive Collapse Events in Unsteady Compressible Cavitating Flows -- 1 Introduction -- 2 Underlying Numerical Model -- 3 Modeling and Implementation of Erosion Indicators and Collapse Detectors -- 4 Results -- 5 Conclusions -- References -- Numerical and Experimental Investigation into Propulsion and Cavitation Performance of Marine Propeller -- 1 Introduction -- 2 Numerical Model -- 2.1 Transitional Flow Simulation -- 2.2 Cavitating Flow Simulation -- 2.3 Numerical Grids -- 3 Numerical Simulation of Propeller Open Characteristics -- 3.1 Propeller Open Characteristics -- 3.2 Transitional Flow Simulation -- 3.3 Scale Effects of Propeller Open Characteristics -- 4 Numerical Simulation of Cavitating Flow -- 4.1 Experimental Data of Partially Eroded Propeller -- 4.2 Numerical Evaluation of Cavitation Erosion Risk -- 4.3 Pressure Pulse Evaluation -- 5 Conclusions -- References -- Advanced Lagrangian Approaches to Cavitation Modelling in Marine Applications -- 1 Introduction -- 2 Numerical Method -- 2.1 Governing Equations -- 3 Euler-Euler Cavitation Model -- 3.1 Cavitating Hydrofoil Flow -- 3.2 Cavitating Flow over the PPTC Propeller -- 4 Euler-Lagrange Cavitation Model -- 4.1 Hybrid MPI/OpenMP Parallelization -- 4.2 Cavitating Hydrofoil Flow -- 4.3 Cavitating Flow over the PPTC Propeller -- 5 Combined Euler-Euler/Euler-Lagrange Cavitation Model -- 5.1 Cavitating Flow over the PPTC Propeller -- 6 Conclusions -- References.

Part VII: Ship Hydrodynamics -- CFD in Ship Hydrodynamics-Results of the Gothenburg 2010 Workshop -- 1 Introduction -- 2 Hulls -- 3 Test Cases -- 4 Participants and Methods -- 5 Selected Results -- 5.1 Resistance -- 5.2 Self-propulsion -- 5.3 Wave Pattern -- 5.4 Local Flow (Steady Case) -- 5.5 Heave and Pitch -- 5.6 Roll Decay at Forward Speed -- 6 Conclusions -- References -- Prediction of the Transom Flow Regime with Viscous Free Surface Computations -- 1 Introduction -- 2 The Computational Method -- 2.1 RANS Solver -- 2.2 Free-Surface Treatment -- 2.3 Grids Suited for Both Dry and Wetted Transom -- 2.4 Grid Density -- 3 Grid Dependence Studies and Comparison with Experiments -- 4 Scale Effects on the Free Surface -- 5 Conclusions -- References -- Anisotropic Mesh Re nement in Ship Flow Simulation with Free Surface -- 1 Introduction -- 2 Finite-Volume Method -- 3 Grid Re nement Procedure -- 3.1 Anisotropic Re nement -- 3.2 Tensor Re nement Criteria -- 4 The Need for Combined Re nement Criteria -- 5 Pressure Hessian-Free Surface Criterion -- 5.1 Free-Surface Criterion -- 5.2 Pressure Hessian -- 5.3 The Combined Criterion -- 6 Test Cases -- 6.1 Prism Impacting on a Water Surface -- 6.2 Immersed NACA0012 Wing -- 6.3 Series 60 Wave Pattern -- 7 Conclusion -- References.

This book contains selected papers from the Fourth International Conference on Computational Methods in Marine Engineering, held at Instituto Superior Técnico, Technical University of Lisbon, Portugal in September 2011.

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