Browsing NTNU Open by Author "Greco, Marilena"
Now showing items 1-20 of 97
-
2D Numerical Study on Wake Scenarios for a Flapping Foil
XU, HUILI; Greco, Marilena; Lugni, Claudio (Chapter, 2021)Fishes are talented swimmers. Depending on the propulsion mechanisms many fishes can use flapping tails and/or fins to generate thrust, which seems to be connected to the formation of a reverse von Kármán wake. In the ... -
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 3D fully-nonlinear potential-flow solver for efficient simulations of large-scale free-surface waves
Hanssen, Finn Christian W.; Helmers, Jens Bloch; Greco, Marilena; Shao, Yanlin (Journal article; Peer reviewed, 2022) -
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 Feasibility Study of a Renewable Energy Supply for an Offshore Oil and Gas Installation
Tvedt, Amund Garsrud; Abraham, Helen (Master thesis, 2022)En hydrodynamisk studie av en flytende vindturbin plassert i Nordsjøen på 130 meters dyp er utført. OO Star Wind Floater som består av en halvt nedsenkbar konstruksjon som støtter referansevindturbinen DTU 10 MW. Den ... -
A Feasibility Study of a Renewable-Energy Supply for an Offshore Oil and Gas Installation
Abraham, Helen; Tvedt, Amund Garsrud (Master thesis, 2022)En hydrodynamisk studie av en flytende vindturbin plassert i Nordsjøen på 130 meters dyp er utført. OO Star Wind Floater som består av en halvt nedsenkbar konstruksjon som støtter referansevindturbinen DTU 10 MW. Den ... -
A Hydro-Aerodynamic Analysis of a Floating Offshore Wind Turbine to Assist in Floater Selection
Boge, Stian Næss; Ekerhovd, Danial Wergeland (Master thesis, 2022)Various types of floaters have been proposed to support floating offshore wind turbines. The bulk of market activity is in semi-submersibles, where each concept is associated with inherent advantages and disadvantages with ... -
A Hydro-Aerodynamic Analysis of a Floating Offshore Wind Turbine to Assist in Floater Selection
Ekerhovd, Daniel Wergeland; Boge, Stian Næss (Master thesis, 2022)Ulike typer fundamenter er foreslått til flytende vindturbiner. Hovedtyngden av markedsaktiviteten er "Semi-submersible" fundamenter, hvor hvert konsept har sine fordeler og ulemper med hensyn til designet. Denne oppgaven ... -
A station-keeping analysis of a damaged floating offshore wind turbine
Aarmo, Martinus (Master thesis, 2023)En økende etterspørsel etter fornybar energi har plassert vindenergi i frontlinjen for bærekraftig kraftproduksjon. I nyere tider har vindindustrien utvidet seg fra landbaserte installasjoner til offshore-lokasjoner, ... -
A Survivability Analysis of Two Floating Offshore Wind Turbines in Intact and Damaged Conditions
Brurås, Stian Røine (Master thesis, 2023)Vindenergi identifiseres som en del av løsningen for å tilby tilstrekkelig bærekraftig, trygg og sikker fornybar energi. Ettersom det er begrenset med passende områder på land eller nær kysten, er det et behov for flytende ... -
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 loads encountered during a single lift operation of offshore wind turbines.
Veršnik, Ana Nuša (Master thesis, 2023)The success of offshore wind farm installations is often related to the costs and time taken to be completed. Current installation strategies require several critical offshore lifts for the completion of a single wind ... -
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 ... -
Comparative investigation: Closed versus semi-closed vertical cylinder-shaped fish cage in waves
Shen, Yugao; Firoozkoohi, Reza; Greco, Marilena; Faltinsen, Odd Magnus (Journal article; Peer reviewed, 2022)A comparative analysis between a closed cage (CC) and a semi-closed/open-bottom cage (OC) in regular, white-noise and irregular waves is presented. Both cages consist of a vertical circular free surface-piercing cylinder ... -
Comparative Study of Potential Flow and CFD in the Assessment of Seakeeping and Added Resistance of Ships
Sulovsky, Ivan; de Hauteclocque, Guillaume; Greco, Marilena; Prpi´c-Orši´c, Jasna (Peer reviewed; Journal article, 2023)The need for maritime freight transport of various goods has never been greater. Consequently, ships are designed with ever-increasing dimensions, with the emphasis, of course, on length. One of the many challenges in the ...