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26 results on '"Choi, Young Myung"'

7. High-Order Spectral Irregular Wave Generation Procedure in Experimental and Computational Fluid Dynamics Numerical Wave Tanks, with Application in a Physical Wave Tank and in Open-Source Field Operation and Manipulation.

Author

Kim, Young Jun, Canard, Maxime, Bouscasse, Benjamin, Ducrozet, Guillaume, Le Touzé, David, and Choi, Young-Myung

Subjects
COMPUTATIONAL fluid dynamics, POTENTIAL flow, THEORY of wave motion, OCEAN engineering, NONLINEAR waves
Abstract

The accurate generation of a target sea state in numerical or experimental wave tanks is a fundamental line of research for the ocean engineering community. It guarantees the quality and relevance of wave–structure interaction tests. This study presents a reproducible irregular wave generation and qualification procedure, accounting for the nonlinear aspects of wave propagation. It can be used for both numerical simulation and experiments. The presented numerical and experimental results are obtained from the OpenFOAM solver and the Ecole Centrale Nantes wave tank facilities, respectively. The procedure comprises two steps: First, the wavemaker motion is calibrated numerically to generate the target wave spectrum at the position of interest. This is achieved with a wavemaker-equipped nonlinear potential flow solver. The open-source HOS-NWT solver, based on the high-order spectral method, was employed in this study. Then, the corrected wavemaker motion is used directly in the experimental wave tank. OpenFOAM simulations were performed to generate waves with the relaxation method, using wave elevation and velocity field data from HOS-NWT. The procedure was finally tested for mild and extreme breaking sea states. The waves generated by the HOS-NWT solver, the experiment, and the OpenFOAM simulation were compared from both stochastic and deterministic perspectives. [ABSTRACT FROM AUTHOR]

Published
2024
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12. Influence of interface treatment in wave propagation in CFD

Author

Kim, Young Jun, Choi, Young-Myung, Bouscasse, Benjamin, Seng, Sopheak, Le Touzé, David, Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique (LHEEA), École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Bureau Veritas (BV), Bureau Veritas Marine & Offshore, and Bureau Veritas

Subjects
ComputingMilieux_MISCELLANEOUS, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

International audience

Published
2018

13. Preliminary study on coupling of viscous and potential flow using domain decomposition and relaxation zones

Author

Choi, Young-Myung, Malenica, S., Bouscasse, Benjamin, Seng, Sopheak, MONROY, C., GENTAZ, L., FERRANT, Pierre, Laboratoire de recherche en Hydrodynamique, Énergétique et Environnement Atmosphérique (LHEEA), École Centrale de Nantes (ECN)-Centre National de la Recherche Scientifique (CNRS), Bureau Veritas (BV), and Bureau Veritas Marine & Offshore

Subjects
ComputingMilieux_MISCELLANEOUS, [SPI.MECA.MEFL]Engineering Sciences [physics]/Mechanics [physics.med-ph]/Fluids mechanics [physics.class-ph]
Abstract

International audience

Published
2018

16. Hydroelasticity analysis for bottom-mounted vertical circular cylinder by considering sloshing effect

Author

Choi, Young Myung, Malenica, Šime, Vladimir, Nikola, Ouled Housseine, Charaf, and Kwon, Sun Hong

Subjects
Condensed Matter::Quantum Gases, Physics::Fluid Dynamics, Astrophysics::Cosmology and Extragalactic Astrophysics, Sloshing, hydroelasticity, vertical circular cylinder
Abstract

Description of the model for the hydroelasticity analysis of a bottom-mounted vertical circular cylinder by considering sloshing effect.

Published
2015

17. Global hydroelastic model for liquid cargo ships

Author

Malenica, Šime, Vladimir, Nikola, Choi, Young Myung, Senjanović, Ivo, Kwon, Sun Hong, Malenica, Šime, Vladimir, Nikola, and Senjanović, Ivo

Subjects
hydroelasticity, sloshing, springing
Abstract

In this paper the problem of the global hydroelastic response of the ships carrying the liquid cargo (LNG ships, tankers, FPSO-s, dry cargo ships in ballast conditions...) is considered. The potential flow assumptions are adopted for the hydrodynamic part and the resulting Boudary Value Problems (BVP) are solved using the classical Boundary Integral Equation Method (BIEM) and that both for the external (seakeeping) and the internal (sloshing) fluid flow. The dynamic equation is solved in a fully coupled sense using the generalizd modal approach. For the time being the linear frequency domain appraoch is considered only.

Published
2015

18. Advanced studies on the hydroelasticity of ships and offshore structures within project GCRC-SOP Korea

Author

Senjanović, Ivo, Vladimir, Nikola, Malenica, Šime, Cho, Dae Seung, Kwon, Sun Hong, Choi, Young Myung, and Dobrinić, J.

Subjects
Hydroelasticity, Ships, Offshore structures, GCRC SOP Project
Abstract

Hydroelasticity is actual branch of science dealing with ships and offshore structure dynamics, simultaneously considering their motions and elastic deformations. During the last decade the above mentioned problem has been also investigated at the Faculty of Mechanical Engineering and Naval Architecture (FAMENA), University of Zagreb. This paper brings an overview of the main research goals and results of hydroelasticity investigation within the projects funded by South Korean Government through the Global Core Research Center for Ships and Offshore Plants (GCRC-SOP). Among others, project participants are the Pusan National University, Busan, Korea, Bureau Veritas (BV), Paris, France as well as FAMENA Zagreb. All projects, funded through GCRC-SOP are presented, with emphasis to those related to investigation of hydroelasticity. Detailed description of the considered problems is given: development of sophisticated beam structural model and its application in the hydroelastic analysis of large container ships ; formulation of restoring stiffness and its role in the response of tension leg platforms (TLP) ; analytical solution for second order hydroelastic vibrations of vertical circular cylinder.

Published
2014

21. On the Pusan National University, Busan, Korea

Author

Vladimir, Nikola and Choi, Young Myung

Subjects
Pusan National University, Busan, Korea
Abstract

This paper brings a short overview of the Pusan National University (PNU), with special emphasis on the Department of Naval Architecture and Ocean Engineering, and is motivated by the one-month research visit of the first author (Nikola Vladimir) to PNU from January till February 2013, which was organized by the Global Core Research Centre for Ships and Offshore Plants (GCRC-SOP).

Published
2013

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