Corentin Lothode

Université de Rouen | UR · Département de Mathématiques

In this article, we investigate the movement and vibrations of a blade due to the presence of the mast. When the blade passes in front of the mast, a sudden pressure spike induces vibrations in the blade. To study the influence of stiffness, two different structures were studied. We present our numerical schemes concerning the resolution of the flo...

We present high-performance and high-accuracy numerical simulations of quantum turbulence modelled by the Gross–Pitaevskii equation for the time-evolution of the macroscopic wave function of the system. The hydrodynamic analogue of this model is a flow in which the viscosity is absent and all rotational flow is carried by quantized vortices with id...

We present and distribute a FreeFem++ Toolbox for the parallel computing of two- or three-dimensional liquid–solid phase-change systems involving natural convection. FreeFem++ (www.freefem.org) is a free finite-element software available for all existing operating systems. We use the recent library ffddm that makes available in FreeFem++ state-of-t...

Efficient Global Optimization (EGO) has become a standard approach for the global optimization of complex systems with high computational costs. EGO uses a training set of objective function values computed at selected input points to construct a statistical surrogate model, with low evaluation cost, on which the optimization procedure is applied....

In this article, we investigate the movement and vibrations of a blade due to the presence of the mast. When the blade goes past the mast, a sudden pressure spike induces vibrations in the blade. To study the influence of the stiffness, two different structures have been investigated. We present our numerical methodology concerning solving the flow...

This paper is concerned with the numerical investigation of Quantum Turbulence (QT) described by the Gross-Pitaevskii (GP) equation. Numerical simulations are performed using a parallel (MPI-OpenMP) code based on a pseudo-spectral spatial discretization and second order splitting for the time integration. We start by revisiting (in the framework of...

We present and distribute a FreeFem++ Toolbox for the parallel computing of two- or three-dimensional liquid-solid phase-change systems involving natural convection. FreeFem++ (www.freefem.org) is a free finite-element software available for all existing operating systems. We use the recent library \texttt{ffddm} that makes available in FreeFem++...

In this article, we aim at providing results of fluid-structure interaction between water turbine blades and its mast. When the blade goes past the mast, a sudden pressure spike is recording, and the acceleration of the blade is recorded. Many results are provided, and two different structures are compared. At first, we validate our model against a...

Given the wide range of applications where fluid-structure interaction (FSI) is present, modelling and understanding this phenomena has become an established branch of computational science. To numerically model complex configurations, which are expensive in terms of computation time, this work proposes and studies an asynchronous algorithm [1] tha...

This paper presents a numerical investigation for the computation of wind or marine current turbines in a farm. A 3D unsteady Lagrangian vortex method is used together with a panel method in order to take into account for the turbines. In order to enforce the boundary condition onto the panel elements, a linear matrix system is defined. Solving gen...

We present a new algorithm based on a quasi-monolithic approach to solve strongly coupled fluid-structure interaction problems. This approach is an implicit coupling adapted to a partitioned solver while conserving the property of convergence and stability of the monolithic approach 1. The coupling is done between a finite element program ARA devel...

This study is based on the problem of fluid-structure interaction on risers. We aim to quantify the structural response of these long pipes, more or less rigid, used for offshore hydrocarbon extraction when they are subject to marine current. The occurring phenomenon is known as VIV (Vortex Induced Vibration). These problems are a relevant chall...

Tests were realized on a complete production chain: a sail designer from Incidences-Sails has designed two different shapes of an IMOCA60 gennaker with the SailPack software. An automatic procedure was developed to transfer data from Sailpack to a structure input file taking into account the orientation of sailcloth and reinforcements. The same aut...

Gennakers are lightweight and flexible sails, used for downwind sailing configurations. Qualities sought for this kind of sail are propulsive force and dynamic stability. To simulate accurately the flow around such a sail, several problems need to be solved. Firstly, the structural code has to take into account cloth behavior, orientation and reinf...

The implantation and deployment of marine current turbine arrays depend on the understanding of their interactions. Based on a priori suggestions about the layout of marine energy converter arrays, we propose to highlight interactions effects between two horizontal axis marine current turbines, in open water. Experimental trials were run in IFREMER...