Browsing by Subject "Enginyeria naval"
Now showing items 1-20 of 301
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3D structural design tool for monohull and multihull vessels
(CIMNE, 2019)
Conference report
Open AccessAn 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 ... -
A 3D rans-vof wave tank for oscillating water column device studies
(CIMNE, 2017)
Conference report
Open AccessThis 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, ... -
A calculation/simulation system of sails communicated in real time with wireless sensors
(Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2009)
Conference report
Open AccessThe 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 ... -
A complete data-driven framework for the efficient solution of parametric shape design and optimisation in naval engineering problems
(CIMNE, 2019)
Conference report
Open AccessIn 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 ... -
A data-driven probabilistic learning approach for the prediction of controllable pitch propellers performance
(CIMNE, 2019)
Conference report
Open AccessThe 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 ... -
A first assessment of the interdependency of mesh motion and free surface models in openfoam regarding wave-structure interaction
(CIMNE, 2019)
Conference report
Open AccessMesh 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 ... -
A generalised unsteady hybrid DES/BEM methodology applied to propeller-rudder flow simulation
(CIMNE, 2017)
Conference report
Open AccessA 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 ... -
A global approximation to the green function for diffraction-radiation of regular water waves in deep water
(CIMNE, 2017)
Conference report
Open AccessThe 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 ... -
A high-order and mesh-free computational model for non-linear water waves
(CIMNE, 2019)
Conference report
Open AccessIn 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 ... -
A linearized free-surface rans method for ship maneuvering
(CIMNE, 2019)
Conference report
Open AccessProper 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 ... -
A mesh adaptive compressible euler model for the simulation of cavitating flow
(CIMNE, 2011)
Conference report
Open AccessWe 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 ... -
A method for the coupling of compressible 3d flow simulations with a cavitation erosion model for ductile materials and assessment of the incubation time
(CIMNE, 2019)
Conference report
Open AccessA 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 ... -
A new adjustment-free damping method for free-surface waves in numerical simulations
(CIMNE, 2017)
Conference report
Open AccessSimulating 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 ... -
A numerical and analytical way for double-stepped planing hull in regular wave
(CIMNE, 2019)
Conference report
Open AccessThe 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 ... -
A numerical and experimental study on the hydrodynamic of a catamaran varying the demihull separation
(CIMNE, 2011)
Conference report
Open AccessA 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 ... -
A numerical model to determine ship manoeuvring motion in regular waves
(CIMNE, 2011)
Conference report
Open AccessA 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 ... -
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 equations
(CIMNE, 2017)
Conference report
Open AccessCoupled 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 ... -
A numerical study on the shedding frequency of sheet cavitation
(CIMNE, 2017)
Conference report
Open AccessThe 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 ... -
A pactical tool for the hydro-acoustic optimization of naval propellers
(CIMNE, 2019)
Conference report
Open AccessPropeller 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 ... -
A real time decision support system for the adjustment of sailboat rigging
(2015)
Article
Open AccessThe 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, ...
