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Listar por tema "Enginyeria naval"

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Mostrando ítems 1-20 de 303

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    • Imagen en miniatura

      3D structural design tool for monohull and multihull vesselsOpen Access 

      Wyman, Jerod; Knight, Joshua; Kring, David (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      An Ultimate Limit State (ULS) based design tool has been developed, which calculates discrete 2D ship sections for computational efficiency, while supporting a 3D geometry model. This tool, called Brokkr, uses a medium ...
    • Imagen en miniatura

      A 3D rans-vof wave tank for oscillating water column device studiesOpen Access 

      Teixeira, Paulo R.F.; Didier, Eric; Neves, Maria G. (CIMNE, 2017)
      Texto en actas de congreso
      Acceso abierto
      This paper presents the validation of a wave maker with active absorption method implemented in FLUENT® RANS-VOF code for modelling long time series of waves propagating and interacting with coastal structures, ...
    • Imagen en miniatura

      A calculation/simulation system of sails communicated in real time with wireless sensorsOpen Access 

      Ortigosa Barragán, Inma; García Espinosa, Julio (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2009)
      Texto en actas de congreso
      Acceso abierto
      The model presented in this paper is part of the development and integration of a System to Support Decision (SAD) for assistance in the design and actuation of sails. The model is based on the union of a wireless sensor ...
    • Imagen en miniatura

      A complete data-driven framework for the efficient solution of parametric shape design and optimisation in naval engineering problemsOpen Access 

      Demo, Nicola; Tezzele, Marco; Mola, Andrea; Rozza, Gianluigi (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      In the reduced order modeling (ROM) framework, the solution of a parametric partial differential equation is approximated by combining the high-fidelity solutions of the problem at hand for several properly chosen ...
    • Imagen en miniatura

      A data-driven probabilistic learning approach for the prediction of controllable pitch propellers performanceOpen Access 

      Gaggero, Stefano; Coppede, Antonio; Villa, Diego; Vernengo, Giuliano; Bonfiglio, Luca (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      The multi-fidelity machine learning framework proposed in this paper leverages a probabilistic approach based on Gaussian Process modeling for the formulation of stochas- tic response surfaces ...
    • Imagen en miniatura

      A first assessment of the interdependency of mesh motion and free surface models in openfoam regarding wave-structure interactionOpen Access 

      Decorte, Griet; Lombaert, Geert; Monbaliu, Jaak (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      Mesh motion is of key importance in assuring adequate CFD modelling of wave- structure interaction problems, such as wave impact on floating offshore wind turbines and seakeeping of ships. Wave forcing ...
    • Imagen en miniatura

      A generalised unsteady hybrid DES/BEM methodology applied to propeller-rudder flow simulationOpen Access 

      Calcagni, D.; Salvatore, F.; Dubbioso, G.; Muscari, R. (CIMNE, 2017)
      Texto en actas de congreso
      Acceso abierto
      A generalised hybrid viscous/inviscid flow model for the hydrodynamic analysis of marine propellers is presented. A Boundary Element Method (BEM) to predict propeller perturbation under inviscid-flow ...
    • Imagen en miniatura

      A global approximation to the green function for diffraction-radiation of regular water waves in deep waterOpen Access 

      Wu, Huiyu; Zhu, Yi; Ma, Chao; Li, Wei; Fu, Huiping; Noblesse, Francis (CIMNE, 2017)
      Texto en actas de congreso
      Acceso abierto
      The Green function of the theory of diffraction radiation of time-harmonic (regular) waves by an offshore structure, or a ship at low speed, in deep water is considered. The Green function G and its gradient ∇G are ...
    • Imagen en miniatura

      A high-order and mesh-free computational model for non-linear water wavesOpen Access 

      Nielsen, Morten E.; Fornberg, Bengt; Damkilde, Lars (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      In this paper, we present the ongoing developments of a novel computational model for non-linear water waves that aims to provide a suitable framework for wave-structure inter- action. The proposed model is based on ...
    • Imagen en miniatura

      A linearized free-surface rans method for ship maneuveringOpen Access 

      Geremia, Paolo; Maki, Kevin J.; Alexias, Pavlos (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      Proper prediction of ship maneuvering – together with powering and seakeeping – is considered essential these days to help naval architects design optimal ship hulls. In this context, traditional finite-volume Computational ...
    • Imagen en miniatura

      A mesh adaptive compressible euler model for the simulation of cavitating flowOpen Access 

      Eskilsson, Claes; Bensow, Rickard E. (CIMNE, 2011)
      Texto en actas de congreso
      Acceso abierto
      We present computations of cavitating flow over a NACA0015 hydrofoil. The simulations are performed by a finite volume compressible Euler model with dynamic mesh adaptation. The adaptive mesh refinement (AMR) is driven ...
    • Imagen en miniatura

      A method for the coupling of compressible 3d flow simulations with a cavitation erosion model for ductile materials and assessment of the incubation timeOpen Access 

      Schreiner, Felix; Mottyll, Stephan; Skoda, Romuald (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      A compressible 3D in-house flow solver with temporal nanosecond resolution is coupled to a simple material erosion model for ductile materials. Due to limited spatial resolution, not all details ...
    • Imagen en miniatura

      A new adjustment-free damping method for free-surface waves in numerical simulationsOpen Access 

      Meyer, Janek; Graf, Kai; Slawig, Thomas (CIMNE, 2017)
      Texto en actas de congreso
      Acceso abierto
      Simulating free-surface flow around ships in sea waves using RANSE-Methods usually requires damping of the waves in front of the outlet to avoid reflections. It has been shown, that common damping methods ...
    • Imagen en miniatura

      A numerical and analytical way for double-stepped planing hull in regular waveOpen Access 

      Bilandi, Rasul Niazmand; Mancini, Simone; Dashtimanesh, Abbas; Tavakoli, Sasan; De Carlini, Maria (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      The paper presents a comparison analysis between numerical method and nonlinear mathematical model for the prediction of the vertical motions of a double stepped planing hull in regular wave. The numerical method is to ...
    • Imagen en miniatura

      A numerical and experimental study on the hydrodynamic of a catamaran varying the demihull separationOpen Access 

      Zaghi, S.; Broglia, R.; Di Mascio, A. (CIMNE, 2011)
      Texto en actas de congreso
      Acceso abierto
      A complementary experimental and numerical study of the interference effect for a fast catamaran is presented. Resistance, sinkage and trim are collected by towing tank experiments for Froude number in the range from 0.2 ...
    • Imagen en miniatura

      A numerical model to determine ship manoeuvring motion in regular wavesOpen Access 

      Schooo-Zipfel, Jochen; Abdel-Maksoud, Moustafa (CIMNE, 2011)
      Texto en actas de congreso
      Acceso abierto
      A numerical program for time-domain calculations of the manoeuvring behaviour in regular waves is presented. The program is based on frequency-dependent coefficients, transfered to time-domain by using the impulse response ...
    • Imagen en miniatura

      A numerical study of added resistance, speed loss and added power of a surface ship in regular head waves using coupled urans and rigid-body motion equationsOpen Access 

      Aram, Shawn; Kim, Sung-Eum (CIMNE, 2017)
      Texto en actas de congreso
      Acceso abierto
      Coupled solutions of two-phase Unsteady Reynolds-Averaged Navier-Stokes equations (URANS) and six degrees-of-freedom (6-DOF) rigid-body motion (RBM) equations are pursued to compute ship’s speed loss and added power for a ...
    • Imagen en miniatura

      A numerical study on the shedding frequency of sheet cavitationOpen Access 

      Melissaris, Themistoklis; Bulten, Norbert; van Terwisga, Tom (CIMNE, 2017)
      Texto en actas de congreso
      Acceso abierto
      The last decades there is a strong interest in predicting cavitation dynamics as it is a prerequisite in order to predict cavitation erosion. Industrial applications require accurate results in an acceptable ...
    • Imagen en miniatura

      A pactical tool for the hydro-acoustic optimization of naval propellersOpen Access 

      Valdenazzi, Federica; Conti, Francesco; Gaggero, Stefano; Vaccaro, Cristina; Grassi, Davide; Villa, Diego (CIMNE, 2019)
      Texto en actas de congreso
      Acceso abierto
      Propeller optimisation is always the focus of the propeller design process, as such process is aimed at finding the best compromise between often conflicting objectives accounting for many design constraints. The use of ...
    • Imagen en miniatura

      A real time decision support system for the adjustment of sailboat riggingOpen Access 

      Ortigosa Barragán, Inma; García Espinosa, Julio; Castells Sanabra, Marcel·la (2015)
      Artículo
      Acceso abierto
      The operational complexity and performance requirements of modern racing yachts demand the use of advanced applications, such as a decision support system (DSS) able to assist crew members during navigation. In this article, ...

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