Multi-phase flow simulations play an essential role in the design and optimization of many engineering systems. Representative examples include offshore floating wind turbines and metallic additive manufacturing. In addition to handling the complex fluid flows, two key issues need to be solved. The first one is how to treat the fluid-fluid interface, which involves large property ratios, pressure discontinuity, and violent topological changes. The second one is how to treat the fluid-structure interface, which has complicated geometry for real engineering structures and the surrounding thin boundary layers.
The presentation features the recent efforts in my research group to address the above challenges in multi-phase flow simulations. I will start with a level-set based variational multi-scale formulation for resolving turbulent flows and the fluid-fluid interface. I will show the application of the formulation, coupled with thermodynamics, to modeling the metallic additive manufacturing process. Then, I will present an isogeometric free-surface fluid-structure interaction that can simulate thin-shell structures directly based on CAD models. Both boundary-fitted and non-boundary-fitted approaches for the fluid-structure interface will be explored. I will present the applications to renewable wind energy.
Date: December 20, 2019, 2:00pm
Location: Room 103, Mathematics Research Center Building, NTU
Sponsers: Center for Advanced Study in Theoretical Sciences (CASTS), NTU
Organizer: Tony Wen Hann Sheu
Speakers:- Jinhui Yan (Department of Civil and Environmental Engineering University of Illinois Urbana-Champaign )
Biography:
Jinhui Yan is currently an assistant professor from the department of civil and environmental engineering at the University of Illinois Urbana-Champaign. He obtained his B.S. from Wuhan University, M.S. from Peking University, and Ph.D. from the University of California, San Diego (UCSD). He received many awards for academic excellence, such as Robert M. and Mary Haythornthwaite Young Investigator Award from American Society of Mechanical Engineers (ASME), World Congress for Computational Mechanics Travel Award from International Association for Computational Mechanics, Charles Lee Powell Fellowship from UCSD, Outstanding Award for Ph.D. Student Abroad from the Chinese government, Presidential Fellowship from Peking University, and National Scholarship. He delivered several invited keynote presentations in World Congress for Computational Mechanics, U.S. National Congress for Computational Mechanics, ASCE Engineering Mechanics Institute Conference, and many leading research universities in the world. He is a committee member of Computational Mechanics of ASCE/EMI, member of CFD and FSI Technical Thrust Area (TTA) Committee of USACM, as well as the vice-chair of Computational Fluid-Structure Interaction Committee, Applied Mechanics Division, ASME.