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=== Multi-phase flows - M. Cailler, SAFRAN TECH === | === Multi-phase flows - M. Cailler, SAFRAN TECH === | ||
| + | |||
| + | D3: convergence of the interface curvature computation. | ||
| + | The computation of interface curvature in a levelset framework is based on the classic formula as divergence of the gradient of the levelset function. This function being computed at 2nd order, one obtains a O(0) curvature, meaning that the error does not decrease with mesh refinement. | ||
| + | We have implemented in YALES2 a strategy proposed by Emmanuel Maître and collaborators in a finite element method based on the regularization (filtering) of the levelset gradient and curvature. | ||
| + | This strategy has been tested for the simple test case of a static circular interface. | ||
| + | We used two types of filters (simple gather-scatter or bilaplacian as developed by Lola Guedot (PhD thesis 2015)) on different mesh types (split quadrilaterals, isotropic triangular mesh, unstructured triangular mesh). | ||
| + | The results are encouraging since a O(1) convergence is obtained in all cases. | ||
| + | Further work is needed to tune the filter properties (amplitude and size) for different spatial resolutions and levelset "narrow band" width. | ||
=== Numerics - G. Lartigue, CORIA === | === Numerics - G. Lartigue, CORIA === | ||
Revision as of 01:37, 28 January 2022
Contents
- 1 Description
- 2 News
- 3 Agenda
- 4 Thematics / Mini-workshops
- 4.1 Combustion - K. Bioche, VUB
- 4.2 Static and dynamic mesh adaptation - G. Balarac, LEGI
- 4.3 Multi-phase flows - M. Cailler, SAFRAN TECH
- 4.4 Numerics - G. Lartigue, CORIA
- 4.5 Turbulent flows - P. Bénard, CORIA
- 4.6 Compressible - L. Bricteux, UMONS
- 4.7 User experience - J. Leparoux, SAFRAN TECH
- 4.8 Hackathon - G. Staffelbach, CERFACS
Description
- Event from 23th to 28th of January 2022
- Location: Centre Bonséjour, Merville-Franceville, near Caen (14)
- Two types of sessions:
- common technical presentations: roadmaps, specific points.
- mini-workshops. Potential workshops are listed below.
- Free of charge
- More than 50 participants from academics (CERFACS, CORIA, IMAG, LEGI, EM2C, UMONS, UVM, VUB, UCL, TUDelft), HPC center/experts (GENCI, AMD, CINES, CRIANN) and industry (Safran, Ariane Group, Siemens-Gamesa).
- Objectives
- Bring together experts in high-performance computing, applied mathematics and multi-physics CFDs
- Identify the technological barriers of exaflopic CFD via numerical experiments
- Identify industrial needs and challenges in high-performance computing
- Propose action plans to add to the development roadmaps of the CFD codes
News
- 03/11/2021: First announcement of the 5th Extreme CFD Workshop & Hackathon !
- 13/01/2022: After discussions with the participants, the 5th Extreme CFD Workshop & Hackathon is maintained as an in-person event! It will be also possible to attend to the plenary sessions and participate remotely to the workshop.
- 14/01/2022: The ECFD5 program is online! The plenary sessions will be announced soon!
- 20/01/2022: The plenary sessions are now defined:
- P1 - 24/01/2022: GPU porting challenges and quantum computing, présentation machine Adastra by G. Staffelbach (CERFACS) + Presentation of the new cluster from CINES called Adastra by C. Andrieu (CINES)
- P2 - 25/01/2022: News, perspectives and future of GPU computing applied to CFD by A. Toure (AMD)
- P3 - 26/01/2022: Theory, applications and perspectives of the Lattice-Boltzmann Method by P. Boivin (M2P2)
- P4 - 27/01/2022: Concepts and notions of mesh adaptation by C. Dapogny (LJK)
- 23/04/2022: The ECFD5 event has now started !! LinkedIn post
Agenda
Thematics / Mini-workshops
These mini-workshops may change and cover more or less topics. This page will be adapted according to your feedback.
Combustion - K. Bioche, VUB
Static and dynamic mesh adaptation - G. Balarac, LEGI
Multi-phase flows - M. Cailler, SAFRAN TECH
D3: convergence of the interface curvature computation. The computation of interface curvature in a levelset framework is based on the classic formula as divergence of the gradient of the levelset function. This function being computed at 2nd order, one obtains a O(0) curvature, meaning that the error does not decrease with mesh refinement. We have implemented in YALES2 a strategy proposed by Emmanuel Maître and collaborators in a finite element method based on the regularization (filtering) of the levelset gradient and curvature. This strategy has been tested for the simple test case of a static circular interface. We used two types of filters (simple gather-scatter or bilaplacian as developed by Lola Guedot (PhD thesis 2015)) on different mesh types (split quadrilaterals, isotropic triangular mesh, unstructured triangular mesh). The results are encouraging since a O(1) convergence is obtained in all cases. Further work is needed to tune the filter properties (amplitude and size) for different spatial resolutions and levelset "narrow band" width.
Numerics - G. Lartigue, CORIA
Turbulent flows - P. Bénard, CORIA
- Sub-project 1: Optimization of the actuator set for several wind turbines in YALES2 (F. Houtin Mongrolle, S. Gremmo, E. Muller & B. Duboc)
