Difference between revisions of "Ecfd:ecfd 3rd edition"
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=== Project #20: Stiff complex fluid simulation with YALES2 === | === Project #20: Stiff complex fluid simulation with YALES2 === | ||
| + | ''Sam Whitmore, Yves Dubief, M2CE, University of Vermont'' | ||
The objective was to simulate (1) ionized gases and (2) polymer solutions in flows using YALES2. Both problems are challenging owing to their stiff thermodynamics (1) or polymer dynamics (2). Significant gains were achieved in the implementation of the respective models thanks to the stiff integrator library CVODE. The plasma flow demonstrated an increase in time step of two orders of magnitude compared to previous implementation of the plasma chemistry in the variable density solver. Polymer models are notoriously prone to numerical instability. Again the use of CVODE showed equivalent if not superior stability of the solution at a fraction of the cost of commonly employed algorithms designed to address the stiffness of the problem. | The objective was to simulate (1) ionized gases and (2) polymer solutions in flows using YALES2. Both problems are challenging owing to their stiff thermodynamics (1) or polymer dynamics (2). Significant gains were achieved in the implementation of the respective models thanks to the stiff integrator library CVODE. The plasma flow demonstrated an increase in time step of two orders of magnitude compared to previous implementation of the plasma chemistry in the variable density solver. Polymer models are notoriously prone to numerical instability. Again the use of CVODE showed equivalent if not superior stability of the solution at a fraction of the cost of commonly employed algorithms designed to address the stiffness of the problem. | ||
Revision as of 09:01, 31 January 2020
ECFD workshop, 3rd edition, 2020
Contents
- 1 Sponsors
- 2 Participants
- 3 Flyer
- 4 Presentations
- 5 Project achievements
- 5.1 Project #1: Hackathon GENCI/ATOS/AMD/CERFACS on AVBP
- 5.2 Project #2: Hackathon GENCI/ATOS/AMD/CORIA on YALES2
- 5.3 Project #3: Développement d’injecteurs lagrangiens dans YALES2
- 5.4 Project #4: Application to combustion and lubrication applications
- 5.5 Project #5: Jet-in-crossflow par une méthode d’interface diffuse
- 5.6 Project #6: Accurate numerical prediction of vortical flows using AMR
- 5.7 Project #7: Modélisation de parois pour la simulation des grandes échelles
- 5.8 Project #8: Implémentation du calcul de la distance à une interface liquide-gaz proche d’une paroi sur maillage non structuré 3D avec YALES2
- 5.9 Project #9: Remeshed particle method at high Schmidt and Reynolds number
- 5.10 Project #10: Remaillage dynamique pour la combustion turbulente prémélangée
- 5.11 Project #11: Multiphysics coupling for wind turbine wake modeling
- 5.12 Project #12: Stability of a semi-implicit compressible cavitation solver
- 5.13 Project #13: DNS of droplet dynamics and evaporation : comparison between structured and unstructured solvers
- 5.14 Project #14: Méthode d'ordre élevé
- 5.15 Project #15: Utilisation d’éléments finis du second ordre dans le SMS
- 5.16 Project #16: Development of a RANS solver in YALES2
- 5.17 Project #17: COUPLING OF A FLUID PLASMA SOLVER WITH A LAGRANGIAN SOLVER FOR THE MODELING OF DUSTY
- 5.18 Project #18: L’Evaporo O Maıtre
- 5.19 Project #19: The Clone Wars
- 5.20 Project #20: Stiff complex fluid simulation with YALES2
- 5.21 Project #21: AVBP Dense Gases
- 5.22 Project #22: Numerical prediction of wind turbine wakes using AMR
Sponsors
Participants
Flyer
Presentations
Project achievements
Project #1: Hackathon GENCI/ATOS/AMD/CERFACS on AVBP
C. Piechurski (GENCI), S. Jauré (ATOS), P.-A. Harraud (AMD), P. Mohanamuraly (CERFACS), G. Staffelbach (CERFACS)
Project #2: Hackathon GENCI/ATOS/AMD/CORIA on YALES2
C. Piechurski (GENCI), S. Jauré (ATOS), P.-A. Harraud (AMD), P. Mohanamuraly (CERFACS), G.Lartigue (CORIA), F. Gava (CORIA), P. Begou (LEGI)
Project #3: Développement d’injecteurs lagrangiens dans YALES2
Project #4: Application to combustion and lubrication applications
Project #5: Jet-in-crossflow par une méthode d’interface diffuse
Project #6: Accurate numerical prediction of vortical flows using AMR
Project #7: Modélisation de parois pour la simulation des grandes échelles
Project #8: Implémentation du calcul de la distance à une interface liquide-gaz proche d’une paroi sur maillage non structuré 3D avec YALES2
Project #9: Remeshed particle method at high Schmidt and Reynolds number
S. Santoso (LJK), J.-B. Lagaert (Math Orsay), G.Balarac (LEGI)
We study the advection of a scalar function in turbulent flows with a multimesh method. The finite volume method is used to solve Navier-Stokes equations on an unstructured mesh (YALES2). The advection equation is solved with remeshed particle method on a cartesian mesh. In the context of parallel computing, we face a very unbalanced problem since a large number of particles are created in a very fine meshed zone. Our strategy to load-balance the problem is to give a weight to every element group which is equal to the density of particle.
Project #10: Remaillage dynamique pour la combustion turbulente prémélangée
Project #11: Multiphysics coupling for wind turbine wake modeling
Project #12: Stability of a semi-implicit compressible cavitation solver
Project #13: DNS of droplet dynamics and evaporation : comparison between structured and unstructured solvers
Project #14: Méthode d'ordre élevé
Project #15: Utilisation d’éléments finis du second ordre dans le SMS
Project #16: Development of a RANS solver in YALES2
Project #17: COUPLING OF A FLUID PLASMA SOLVER WITH A LAGRANGIAN SOLVER FOR THE MODELING OF DUSTY
Project #18: L’Evaporo O Maıtre
Project #19: The Clone Wars
Project #20: Stiff complex fluid simulation with YALES2
Sam Whitmore, Yves Dubief, M2CE, University of Vermont The objective was to simulate (1) ionized gases and (2) polymer solutions in flows using YALES2. Both problems are challenging owing to their stiff thermodynamics (1) or polymer dynamics (2). Significant gains were achieved in the implementation of the respective models thanks to the stiff integrator library CVODE. The plasma flow demonstrated an increase in time step of two orders of magnitude compared to previous implementation of the plasma chemistry in the variable density solver. Polymer models are notoriously prone to numerical instability. Again the use of CVODE showed equivalent if not superior stability of the solution at a fraction of the cost of commonly employed algorithms designed to address the stiffness of the problem.
