| Biography | |
|---|---|
 Prof. Decheng Wan Shanghai Jiao Tong University, China |
|
| Title: Development of Efficient CFD Solver for Ship Flows and Ocean Engineering Flows | |
| Abstract: In this presentation, an efficient overset techniques for simulating the complicated viscous flows around ship and ocean structures is introduced. An in-house CFD solver naoe-FOAM-SJTU is developed using the OpenFOAM toolbox which consists of main three special modules of numerical wave tank, 6DOF body motion module and mooring system module. In the numerical wave tank, several wave-makers including piston wave maker, flap wave maker and inlet wave boundary are developed to numerically generate regular waves, irregular waves, directional waves, freak waves, rogue waves, focused waves, etc. An artificial spongy layer is set up at the end of the computation domain to absorb the wave reflection. In the 6DOF body motion module, overset grid method is applied for handling body motion. The main procedure of the overset grid method consists of three steps: projection, hole cutting and fringe-point interpolation. The local body-fit grids are allowed to be arbitrarily embodied into an orthogonal background grid. Therefore the motion of ship and ocean structures in fluid can be treated easily by the overset grid technique without regenerating the mesh. In the mooring system module, three types of mooring lines using taut method, catenary method and piecewise extrapolation method are developed to treat the floating structures. In order to validate the solver, several numerical examples of flows around surface ship (Wigly, KCS, DTMB5415, Catamaran), green water of ship motion in waves, self-propulsion of ship motion, LNG tank sloshing, wave run-up and impact loads on floating platform with mooring system, VIV for risers and VIM for deep-sea platform, as well as wake flows of offshore floating wind turbine are presented. | |
| Biography: Prof. Decheng Wan received his Ph.D from Shanghai Jiao Tong University (SJTU), China in 1994. He became a lecturer of Shanghai University in 1994, and was promoted to be an associate professor of Shanghai University in 1996. After successively worked as a research fellow of the Royal Society at University College London, UK, a senior research fellow at National University of Singapore, and a Wissenschaftliche Angestellter at Dortmund University, Germany from 1997 to 2005, he returned to Shanghai and was appointed as a full professor of Shanghai Jiao Tong University in 2006. He was selected as a distinguished professor of Shanghai Eastern Scholar in 2008, and promoted as a chair professor of Chang Jiang Scholar of China in 2014, and distinguished professor of Shanghai Jiao Tong University in 2015. Currently, Prof. Wan is Head of Computational Marine Hydrodynamics Laboratory (CMHL) at SJTU. His research interest is mainly on computational marine and coastal hydrodynamics, Computational Marine Hydrodynamics, Simulation Based Design for Offshore and Polar Structures, Renewable Energy in Deep Sea, numerical marine basin, nonlinear wave theory, wave loads on structures, numerical analysis of riser vortex-induced vibration (VIV) and platform vortex-induced motion (VIM), fluid- structure interaction, offshore wind turbine and other offshore renewable resources, as well as high performance computation on complex ship and ocean engineering flows, etc. In these areas, he has published over 480 papers and carried out more than 30 projects on marine hydrodynamics and computational hydrodynamics. He is Board of Directors and Chair of International Hydrodynamic Committee (IHC) of International Society of Offshore and Polar Engineering (ISOPE), Member of Advisor Committee of International Towing Tank Conference (ITTC), Member of Energy Saving Method Specialist Committee and CFD Specialist Committee of International Towing Tank Conference (ITTC), Member of Steering Committee of CFD Workshops in Ship Hydrodynamics, Standing Council Member of Association of Global Chinese Computational Mechanics, Member of External Advisory Committee (EAC) of the Department of Ocean Systems Engineering (OSE) of Korea Advanced Institute of Science and Technology (KAIST). He is associate editor of Journal of Hydrodynamics, Journal of Ocean Science and Engineering, as well as member of Editorial Board of Ocean Engineering, Applied Ocean Research, Journal of Ocean and Wind Energy, Journal of Shipping and Ocean Engineering, International Journal of Naval Architecture and Ocean Engineering, Journal of Ship Mechanics, Journal of Marine Science and Applications, Journal of China Ship Research as well as Journal of Chinese Quarterly of Mechanics. | |
