Conference Program

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Wed, Nov 25 Thu, Nov 26 Fri, Nov 27

NUMGRID 2020 is a free online event (no registration fee).

You can join the event by filling out Registration Form. After the approval of your registration, you should receive a confirmation email with a personal link to join the online meeting.

Wednesday, November 25

Morning Session: Delaunay-Voronoi Theory and Applications

10:15 Welcome by the NUMGRID Committee / About Boris Delaunay by Nikolai Dolbilin
10:30 Local groups in Delone sets.
Nikolai Dolbilin (invited speaker)
11:30 Polygonal and polyhedral Delaunay-Voronoi meshing.
Vladimir Garanzha, Liudmila Kudryavtseva
12:00 Update weighted Delaunay triangulations by flips.
Hang Si
12:30 Out-of-core constrained Delaunay tetrahedralizations for large scenes.
Ziya Erkoc, Aytek Aman, Ugur Gudukbay, Hang Si
13:00 Break

Day Session: Adaptive Meshing

15:00 Recent developments for anisotropic mesh adaptation for turbulent flows in aeronautics.
Frédéric Alauzet / Adrien Loseille (invited speaker),
16:00 Size gradation control for anisotropic hybrid meshes.
Lucille-Marie Tenkès, Frédéric Alauzet
16:30 Adjoint computation on anisotropic meshes in high-Fidelity RANS simulations.
Francesco Clerici, Frédéric Alauzet
17:00 Preserved structure constants for red refinements of product elements.
Sergey Korotov, Jon Eivind Vatne
17:30 Break

Evening Session: Delaunay-Voronoi Theory and Applications, Meshing and CAD

19:30 Learning robust Delaunay/Voronoi (primal-dual) meshes with minimal uncertainty.
Chandrajit L. Bajaj (invited speaker)
20:30 The singularity set of optimal transportation maps.
Zhongxuan Luo, Wei Chen, Na Lei, Yang Guo, Tong Zhao, Xianfeng Gu
21:00 Parametrization of plane irregular regions: a semiautomatic approach I.
Pablo Barrera Sánchez, Iván Méndez Cruz
21:30 Adjourn for the day

Thursday, November 26

Morning Session: Adaptive meshing, Meshing and CAD

10:30 Adaptive grids for detecting non-monotone waves and instabilities in a non-equilibrium PDE model from porous media.
Paul A. Zegeling (invited speaker)
11:30 Generation of boundary layer meshes by the enhanced Jump-and-Walk method with a fast collision detecting algorithm.
Jie Cao, Fei Yu, Z.H. Gao, S.H. Lo, Zhenqun Guan
12:00 Bottom-up discrete CAD model generation.
Fei Yu, Jie Cao, Julin Shan, S.H. Lo, Zhenqun Guan
12:30 Hexahedral mesh generation using voxel field recovery.
Alexandr Karavaev, Sergey Kopysov
13:00 Break

Day Session: Numerical Geometry and Applications, Meshing and CAD

15:00 Optimization-based PDE-constrained discontinuity tracking with high-order curved unstructured meshes.
Per-Olof Persson (invited speaker)
16:00 On integral-based (transfinite) Laplace coordinates.
Alexander Belyaev, Pierre-Alain Fayolle
16:30 An improved algorithm for scattered data interpolation using quartic triangular Bézier surfaces.
Krassimira Vlachkova
17:00 Break
17:15 Global parametrization based on Ginzburg-Landau functional.
Étienne Corman, Victor Blanchi, Nicolas Ray, Dmitry Sokolov (invited speaker)
18:15 Break

Evening Session: Adaptive Meshing

19:30 A surface moving mesh PDE method.
Weizhang Huang (invited speaker), Avary Kolasinski
20:30 Moving deforming mesh generation based on quasi-isometric functional.
Vladimir Garanzha, Liudmila Kudryavtseva
21:00 A uniform convergence analysis for a Bakhvalov-type mesh with an explicitly defined transition point.
Thai Anh Nhan
21:30 Adjourn for the day

Friday, November 27

Morning Session: Adaptive meshing, Numerical Geometry and Applications, Meshing and CAD

10:30 On a comprehensive grid for solving problems having exponential or power–of–first–type layers.
Vladimir Liseikin, Samir Karasuljic, Aleksandr Mukhortov, Viktor Paasonen
11:00 RBF-VerBSS hybrid method for mesh deformation.
Chang Jihai, Guan Zhenqun
11:30 An application of the adaptation criterion in the grid generation technology for volumes bounded by the surfaces of revolution.
Olga Ushakova
12:00 Polyhedral annexation method for polytope projection in Julia.
Maxim Demenkov
12:30 A hybrid approach to fast indirect quadrilateral mesh generation.
Daniel Zint, Roberto Grosso
13:00 Break

Day Session: Numerical Methods

14:00 Discrete dissipative structures and relation to meshing.
Klaus Gärtner (invited speaker)
15:00 Efficient steady flow computations with exponential multigrid methods.
Shu-Jie Li
15:30 Fully-implicit collocated Finite Volume Method for the unsteady incompressible Navier-Stokes problem.
Kirill Terekhov
16:00 Exponential time integrators for unsteady advection-diffusion problems on refined meshes.
Mikhail Botchev
16:30 Break

Evening session: Delaunay-Voronoi Theory and Applications

18:30 On decomposition of embedded prismatoids in $\mathbb{R}^3$ without additional points.
Hang Si (invited speaker)
19:30 Manifolds of triangulations, braid groups of manifolds, and the groups $\Gamma_{n}^{k}$.
Denis Fedoseev, Vassily Manturov, Igor Nikonov
20:00 A proof of the invariant-based formula for the linking number and its asymptotic behaviour.
Matthew Bright, Olga Anosova, Vitaliy Kurlin
20:30 Closing by the NUMGRID Committee