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Blar i NTNU Open på forfatter "Greco, Marilena"

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Viser treff 1-20 av 72

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    • 3D Domain Decomposition for Violent Wave-Ship Interactions 

      Greco, Marilena; Colicchio, G; Lugni, Claudio; Faltinsen, Odd Magnus (Journal article, 2013)
      A 3D Domain-Decomposition (DD) strategy has been developed to deal with violent wave-ship interactions involving water-on-deck and slamming occurrence. It couples a linear potential flow seakeeping solver with a Navier–Stokes ...
    • A combined wind and wave energy-converter concept in survivalmode: Numerical and experimental study in regular waves with afocus on water entry and exit 

      Wan, Ling; Greco, Marilena; Lugni, Claudio; Gao, Zhen; Moan, Torgeir (Journal article; Peer reviewed, 2017)
      Water entry (including slamming) and exit phenomena as well as green water on deck were observed during survivability model tests of a combined wind and wave energy converter concept. Here, a nonlinear numerical ...
    • A depth semi-averaged model for coastal dynamics 

      Antuono, M; Colicchio, Giuseppina; Lugni, Claudio; Greco, Marilena; Brocchini, M (Journal article, 2017)
      The present work extends the semi-integrated method proposed by Antuono and Brocchini [“Beyond Boussinesq-type equations: Semi-integrated models for coastal dynamics,” Phys. Fluids 25(1), 016603 (2013)], which comprises a ...
    • A domain-decomposition strategy for a compressible multi-phase flow interacting with a structure 

      Greco, Marilena; Colicchio, Giuseppina; Faltinsen, Odd Magnus (Journal article, 2014)
      The problem of a high-pressure gas cavity and its interaction with surrounding liquid and a close-by structure is examined numerically. Even though this is of interest in many practical applications, here, the focus is on ...
    • A Two-Dimensional Study of Green-Water Loading 

      Greco, Marilena (Dr. ingeniøravhandling, 0809-103X; 2001:70, Doctoral thesis, 2001)
      Large relative motions between the ship and the water may cause water shipping on the main deck. In this thesis, the fundamental features of water-on-deck phenomena are in vestigated, together with the "green" water loading ...
    • An Experimental Investigation on Bio-Fouling Induced Drag 

      Sæther, Arne Kristian (Master thesis, 2015)
      Marine fish farming is an important and growing industry. Fouling organisms that grow on the net cages and other structural components of the fish farms are a substantial problem for the industry. The overall aim of this ...
    • Analysis of Open-Source CFD Tools for Simulating Complex Hydrodynamic Problems 

      Siddiqui, Mohd Atif; XU, HUILI; Greco, Marilena; Colicchio, Giuseppina (Chapter, 2020)
      OpenFOAM (OF) represents an attractive and widely used open-source environment for simulating complex hydrodynamic scenarios with several implemented numerical methods and wide variety of problems it can be applied to. For ...
    • Analysis of Vortex Induced Motions for Floating Wind Turbines 

      Christensen, Anni Yang (Master thesis, 2019)
      Et økende fokus på globale oppvarming har vært den drivende kraften bak forsking på fornybar energi i flere år. Vindkraft er en viktig bidragsyter blant de fornybare energiprodusentene, og markedet for vindkraft er i ...
    • Can the water on deck influence the parametric roll of a FPSO? A numerical and experimental investigation 

      Greco, Marilena; Lugni, Claudio; Faltinsen, Odd Magnus (Journal article; Peer reviewed, 2014)
      Parametric roll and water on deck are investigated numerically and experimentally for a FPSO ship in head-sea regular waves in the zone of the first fundamental resonance. On the numerical side, a weakly-nonlinear potential ...
    • A Coupled Harmonic Polynomial Cell and Higher-Order Spectral Method for Nonlinear Wave Propagation 

      Hanssen, Finn Christian W.; Helmers, Jens Bloch; Greco, Marilena (Chapter, 2020)
      The present work deals with wave generation in fully nonlinear numerical wave tanks (NWT). As an alternative to modelling a moving (physical) wavemaker, a two-dimensional (2D) potential-flow NWT is coupled with an external ...
    • Coupling of a 2D Boundary Element Method with a local analytical solution to deal with geometrical singularities 

      Biørn-Hansen, Einar (Master thesis, 2016)
      Boundary Element Method, BEM, as a numerical tool to solve boundary values problems, has been developed and tested. The numerical scheme is coupled with known analytical flow models for geometrical singularities, and results ...
    • Development of a new Navier-Stokes Solver using a Generalized HPC method for the Pressure Poisson Equation 

      Rabliås, Øyvind (Master thesis, 2016)
      The computational cost of solving the Navier-Stokes equations numerically is too high for most full-scale applications, especially within the marine field. Many marine structures are defined as large volume structures. For ...
    • Domain Decomposition strategies for modelling survivability conditions of WECs 

      Colicchio, Giuseppina; Greco, Marilena; Antuono, Matteo (Chapter, 2019)
    • Dynamic domain decomposition strategy coupling lattice Boltzmann methods with Finite differences approximations of the Navier-Stokes equations to study bodies in current 

      Colicchio, Giuseppina; Greco, Marilena; Lugni, Claudio; Faltinsen, Odd Magnus (Chapter; Peer reviewed, 2015)
      A Domain-Decomposition (DD) strategy is proposed for problems involving regions with slow variations of the flow (A) and others where the fluid features undergo rapid changes (B), like in the case of steady current past ...
    • Experimental and Numerical Hydrodynamic Analysis of a Damaged Ship Section In Waves 

      Siddiqui, Mohd Atif (Doctoral theses at NTNU;2020:361, Doctoral thesis, 2020)
      In the past few decades, ships have become larger, efficient, durable but the danger of accidental events like grounding, collision etc. continues to be a major issue in ship operations. Following a damage event, a ship ...
    • Experimental studies of a damaged ship section in beam sea waves 

      Siddiqui, Mohd Atif; Greco, Marilena; Faltinsen, Odd Magnus; Lugni, Claudio (Journal article; Peer reviewed, 2020)
      This work presents a series of experiments performed with a prismatic hull form in a small wave flume. The model is a midship section with rectangular damage opening on the side. It is slightly smaller than the flume breadth ...
    • Experimental studies of a damaged ship section in forced heave motion 

      Siddiqui, Mohd Atif; Greco, Marilena; Lugni, Claudio; Faltinsen, Odd Magnus (Journal article; Peer reviewed, 2019)
      This work documents a detailed series of experiments performed in a wave flume on a thin walled prismatic hull form. The model consists of a rectangular opening located on the side. The length of the model is slightly ...
    • Foil Motion Control av høyhastighetskatamaraner 

      Håberg, Ida Oline (Master thesis, 2019)
      Skip som opererer ved høye hastigheter utsettes regelmessig for kraftige bølgeinduserte belastninger og vibrasjoner forårsaket av store bevegelser og akselerasjoner. Et neddykket foilsystem kombinert med en kontrollalgoritme ...
    • Free-Surface Tracking in 2D with the Harmonic Polynomial Cell Method: Two Alternative Strategies 

      Hanssen, Finn Christian W.; Bardazzi, Andrea; Lugni, Claudio; Greco, Marilena (Journal article, 2017)
      Several cases of nonlinear-wave propagation are studied numerically in two dimensions within the framework of potential flow. The Laplace equation is solved with the Harmonic Polynomial cell (HPC) method, which is a field ...
    • Gas cavity-body interactions: Efficient numerical solution 

      Colicchio, Giuseppina; Greco, Marilena; Faltinsen, Odd Magnus; Brocchini, Maurizio (Journal article; Peer reviewed, 2015)
      The paper investigates the interactions occurring between a gas cavity, the surrounding liquid and the nearby structures. In more detail, focus is in the characterization of the various dynamical phases (e.g. “acoustic ...

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