孙哲
Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Gender:Male
Alma Mater:University of Southampton
Degree:Doctoral Degree
School/Department:School of Naval Architecture and Ocean Engineering
Discipline:Design and Manufacture of Ship and Ocean Structure
Business Address:Towing tank building, Room 305
Contact Information:ResearchGate Homepage: https://www.researchgate.net/profile/Zhe_Sun12
E-Mail:zsun@dlut.edu.cn
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Indexed by:Journal Papers
Date of Publication:2019-11-15
Journal:OCEAN ENGINEERING
Included Journals:EI、SCIE
Volume:192
ISSN No.:0029-8018
Key Words:Fluid resonance; Moonpool; Convex appendage; Flow pattern; Heave motion; OpenFOAM (R)
Abstract:Fluid resonance in moonpool formed by two identical hulls undergoing heave oscillation is investigated by using a viscous fluid flow solver with RNG turbulent model based on OpenFOAM (R) package. By comparison of experimental and numerical results, it is confirmed the present numerical model can simulate the gap resonance problem in a high level accuracy. Numerical simulations suggest that the resonant amplitude in moonpool decreases dramatically when installing the convex appendages, which is the reason of significant variation of velocity flow field in the vicinity of moonpool. The single convex appendages at the bottom or near the free surface can generate smaller resonant amplitude than that at the middle of moonpool wall. The vortex bubbles from the convex appendages at the moonpool bottom create more energy dissipation than those for the convex appendages in the middle of moonpool and near the free surface. As for the multiple convex appendages, the variation of resonant amplitude with appendages types follows the suppressing characteristics of single convex appendages when heave amplitude is small. However, the additional appendages at the middle of moonpool wall shrink the region of vortex bubbles from the bottom appendages when the heave amplitude is large, leading to the increased resonant amplitude in moonpool. All of these phenomena indicate the complex effect of vortex shedding in the moonpool region on resonant behavior. Finally, the vertical force on each appendage in multiple types is always smaller than that on the appendage in single types, implying the multiple appendages types can reduce the fluid force on the appendage.
Dr Zhe SUN is an associate Professor in School of Naval Architecrue and Ocean Engineering of Dalian University of Technology. He obtained his first and Master degree from Harbin Engineering University （in China）in 2009 and 2012. In 2016, he graduated from Univerisity of Southampton (in UK) with PhD degree in Computational Mechanics . He joined Dalian University of Technoloy in 2017 as Lecturer. He is now teaching the course of Enviromental Mechanics for Ocean Engineering for undergraduate students.
His main research insterests include Computational Fluid Dynamcis, Particle Meshless Method and Wave-Structure Interaction. He has published more than 20 peer-reviewed journal papers spanning from renowned Ocean Engineering and Computational Engineering journals such as Ocean Engineering, Marine Structures, Applied Ocean Research and Journal of Fluids and Structures etc.
