Schools CEA - EDF - INRIA

Informatics school 2024

Informatics school 2024: contents, program, dates, practical information.

2024 summer school on informatics

Hexahedral mesh for numerical simulation

Last update

  • The summer school is located at the LORIA building. To go there, you can refer to the following map: https://www.loria.fr/en/loria/locate-us/.
  • The main entrance is located in front of the parking (see picture below)
  • If you plan to use bus transportation to come, please buy only one single ticket. We will provide you tickets for the week at your arrival at the school on Monday morning.

Social Events

  • Tuesday June 11, 19h00-20h30. Nancy walking guided tour, meeting point in front of the “Office de tourisme”, place Stanislas.
  • Wednesday June 12, 19h30. Dinner at “Grand Café Foy”, 1 place Stanislas.

Scientific context

In the numerical simulation process, mesh generation is a crucial and time-consuming step for the engineer. This is particularly true for hexahedral meshes, which are structured in blocks and can take expert engineers several days to generate, using interactive 3D tools that are complex to master. It’s a real challenge for expert engineers to work with interactive 3D tools that are complex to master.

Since hexahedral meshes are still preferred by various computational codes in fluid and solid mechanics, it is crucial to reduce the engineering time spent on generating them. This means developing new automatic or semi-automatic generation methods, setting up tools to diagnose the quality of a mesh according to the code that will use it, and specializing in interactive software to manipulate 3D hexahedral block structures. Faced with this challenge, many new methods have been developed in recent years to generate the desired meshes based on:
• The use of orientation fields;
• Global parameterization methods;
• Polycube construction;
• Manipulation of the dual structure of the mesh;
• Improvement of grid intersection methods;
• Manipulation of hexahedral structure strings and sheets.

In all cases, the problem is related to the global topological structuring of hexahedral meshes. In addition, several open-source software packages now offer functions enabling the scientific community to create their own meshes.

Contents

The aim of this summer school is to provide an overview of the automatic and semi-automatic methods currently used to generate hexahedral meshes for academic and industrial purposes. Starting from CAD-like geometric models as input data, recently developed practical and theoretical methods for generating and manipulating hexahedral meshes will be presented. In particular, the following points will be addressed:
• An overview of existing (semi-)automatic methods for generating hexahedral meshes with associated quality criteria;
• A focus on different representations and methods for generating orientation fields;
• Notions of global parametrizations and their use in meshing;
• Polycube methods;
• Grid intersection methods.
An important part of the course will be devoted to computer-based practical exercises to manipulate these concepts using various software packages, ranging from understanding concepts such as orientation fields to interactive generation of block-structured meshes, via mesh quality assessment.

Practical information

Date

10 juin – 14 juin 2024

Place

Centre Inria à Nancy
We advise participants to find a hotel in the center of Nancy (near the train station) to meet and have dinner together in the evening.

Registration

If you wish to participate, please fill the registration form Word icon and send it before 12 mai 2024 at Régis Vizet.

Computer for the practical sessions

Practical session will be done on participant’s laptop. When registering, please contact Franck Ledoux to indicate your operating system, or if you are unable to bring a laptop.

Contacts

Summer schools secretary
Régis Vizet – CEA
tel: 01 69 26 47 45
Fax: 01 69 26 70 05

Coordinators of the computer science 2024 school
Franck Ledoux

Dmitry Sokolov

Program

Monday June 10 Tuesday June 11 Wednesday June 12 Thursday June 13 Friday June 14
8h30-9h15

Coffee and pastries

8h45-9h30

Coffee and pastries

8h45-9h30

Coffee and pastries

8h45-9h30

Coffee and pastries

8h15-8h45

Coffee and pastries

9h15-9h30

School Introduction


9h30-12h45

Lesson

S. Owen

Foundations of Quad Meshing: Geometry, Methods, and Cubit’s Capabilities

9h30-12h45

Lesson

S. Owen

Hex Meshing: Theory and Practice

9h30-12h45

Lesson

A. Vaxman

Directional and frame fields

9h30-12h45

Lesson

M. Campen

Quad and Hex Mesh Generation using Integer Grid Maps

8h45-11h45

Lesson

J.-F. Remacle

Quad and Hex meshing using GMSH


12h00-13h00

Practical work on computer

J.-F. Remacle

Quad and Hex meshing using GMSH

12h45-14h00

Lunch

12h45-14h00

Lunch

12h45-14h00

Lunch

12h45-14h00

Lunch

13h00-14h00

Lunch

14h00-16h45

Practical work on computer

S. Owen

Foundations of Quad Meshing: Geometry, Methods, and Cubit’s Capabilities

14h00-16h45

Practical work on computer

S. Owen

Hex Meshing: Theory and Practice

14h00-16h45

Practical work on computer

A. Vaxman

Directional and frame fields

14h00-16h45

Practical work on computer

S. Caldéran and N. Le Goff

Magix3D for topological hex blocking

14h00-15h30

Practical work on computer

J.-F. Remacle

Quad and Hex meshing using GMSH

Coffee break Coffee break Coffee break Coffee break Coffee break
17h00-18h00

Invited talk

François Protais (Siemens DISW)

Structured meshes: an industrial need and a scientific challenge

17h00-18h00

Invited talk

Raphael Marc (EDF)

EDF R&D : needs concerning the hexa meshing, user experience feedback

17h00-18h00

Invited talk

Xevi Roca (BSC, Barcelona)

Meshing for high-fidelity simulation: curving straight-edged elements

17h00-18h00

Invited talk

Laurent Duval (IFPEN)

Structured mesh compression for simulations in geoscience: an integrated multiresolution approach with HexaShrink and LUNDI models

15h30-16h00

Closing remarks