Title: New Progress on Hexahedral Mesh Generation, Editing and Improvement Based on Dual Operation and Frame Field
Biography: Dr. Shuming Gao is a professor of the State Key Lab of CAD&CG and the School of Computer Science and Engineering, Zhejiang University. He received his Ph.D. degree from the Applied Mathematics Department of Zhejiang University in 1990, and was a visiting professor in the Design Automation Lab of Arizona State University and Fraunhofer-Institute for Production Systems and Design Technology(IPK) respectively in 2001 and 2006. His research interests include geometric modeling, feature based CAD/CAM, seamless integration of CAD and CAE, hexahedral mesh generation, virtual prototyping, engineering informatics, etc. He has published over 150 peer-reviewed journal and conference papers on these topics. Currently he serves as a Co-Editor in Chief of Journal of Computational Design and Engineering and a member of the editorial board of Visual Computing for Industry, Biomedicine and Art. He also served as an associate editor of ASME Trans. of Journal of Computing and Information Science and Engineering, co-chair of ACM SPM2014, SMI2014, ACDDE 2012 and 2013 PLM Workshops, co-chair of program committee of ICMA2010, and the chair of organization committee of IEEE CAD/Graphics2009. In addition, he is the PC member of a number of conferences including ACM Solid and Physical Modeling, IEEE CSCW in Design, Geometric Modeling and Processing, etc.
Abstract: Automated generation of high quality hexahedral meshes of complex solid models including effective editing and topological improvement of hexahedral mesh is still an open issue. Dual operation and frame field are two useful techniques for supporting hexahedral mesh generation, editing and improvement. This is because dual operations can effectively modify the topology of hexahedral mesh, while the frame field of a solid model indicates the ideal directions of hexahedral meshes of the solid model. Therefore, over the past few years, we have been exploring how to use dual operation and frame field more effectively to achieve automated generation of high quality hexahedral meshes as well as effective editing and topological improvement of hexahedral mesh. In this talk, I will present our major progress on this aspect, including robust, efficient and optimized sheet inflation, block decomposition of solid models based on frame field and dual operation, topological improvement of hexahedral mesh based on frame field and dual operation, and flexible editing of hexahedral mesh through dual operation.
Title: Paving the Path Towards Automatic Hexahedral Mesh Generation
Biography: Franck Ledoux is currently a researcher and a group leader in Computer Science at CEA (France). He has also been an Associate Professor since 2009 in a Computer Science Department at the University of Paris-Saclay (France). After receiving in 2002 a PhD in Computer Science for his work mixing algebraic specifications and computational geometry, he entered at CEA to design and develop meshing algorithms. He has now about 15 years of experience in mesh generation, and more precisely in the design of parallel meshing framework and the generation of quadrilateral and hexahedral structured meshes.
Abstract: Knowing if it is better to use tetrahedral or hexahedral meshes for finite element analysis is a long-standing polemic. In practice, a large number of finite element users still wish to use hexahedral meshes. And most of the time, they mean block-structured hexahedral meshes! However, the automatic generation of such hexahedral meshes for any arbitrary geometric domains seems always beyond our reach nowadays. That is why many software-meshing companies provide interactive modes where engineers split and cut complex solid models in meshable blocks. In this context, the purpose of this talk is to make a survey of current research trends in hexahedral mesh generation, like frame fields, Polycubes or overlay-grid techniques. I will try and give their benefits and drawbacks regarding the type of geometric domains and the expected features of the hexahedral mesh. Eventually, we will see whether we take the right direction to pave the path towards automatic hexahedral mesh generation.
Title: The Two Reasons Why Mesh Generation is So Difficult
Biography: John Chawner is president and co-founder of Pointwise. He has been involved in CFD since 1984 and mesh generation since 1987 when he became one of the original developers of the Gridgen software. He earned a B.S. in mechanical/aerospace engineering in 1984 from Syracuse University and an M.S. in aerospace engineering from the University of Texas at Arlington in 1990. He is an associate fellow of the AIAA, a former chair of their Meshing, Visualization and Computational Environments (MVCE) technical committee, current lead of MVCE’s Geometry and Mesh Generation Workshop, a member of the ASSESS Initiative's advisory committee, a former member of the IMR steering committee, and a member of the mechanical and aerospace engineering advisory board for Syracuse University.
Abstract: There are precisely two reasons why mesh generation is so difficult. This presentation will reveal those two fundamental challenges, describe how they have been present since the earliest days of meshing, and express opinions about their implications for the future advancement of the discipline.