Team sage

Overall Objectives
Scientific Foundations
Application Domains
New Results
Contracts and Grants with Industry
Other Grants and Activities

Section: Other Grants and Activities

National grants

GNR MOMAS: project on reactive transport

Participants : Jocelyne Erhel, Souhila Sabit.


The working group MOMAS includes many partners from CNRS, INRIA, universities, CEA, ANDRA, EDF and BRGM. It covers many subjects related to mathematical modeling and numerical simulations for nuclear waste disposal problems. We coordinate the project entitled “numerical models and simulations for transport by advection diffusion of chemical species with kinetic and equilibrium reactions.”

See sections 6.3.1 , 4.2 .

ANR-CIS: MICAS project

Participants : Édouard Canot, Julia Charrier, Jocelyne Erhel, Géraldine Pichot, Baptiste Poirriez, Nadir Soualem.

Contract with ANR, program CIS

Time: four years from January 2008.

Title: Modelling and Intensive Computation for Aquifer Simulations.

Coordinator: Sage.

Partners: Geosciences Rennes, University of Le Havre, University of Lyon 1.

Web page:

The project is designed to solve great challenges in hydrogeology and to develop free generic software. Numerical modelling is an important key for the management and remediation of groundwater resources. The objectives of MICAS are to get outstanding results in seven well-identified topics: 1. Macro-dispersion in 3D heterogeneous porous media. 2. Steady flow in 3D Discrete Fracture Networks (DFN). 3. Well test interpretation in 2D and 3D heterogeneous porous media and in DFN. 4. Flow in 2D and 3D fractured porous media. 5. Large scale multilevel sparse linear solvers. 6. Stochastic models and algorithms for dealing with lack of observation and heterogeneity. 7. Deployment of multi-parametric simulations on a computational grid. A last topic is devoted to software for integrating all the modules developed in the project. Our commitment is to develop the H2OLAB platform.

See sections 6.1.4 , 6.3.2 , 6.3.3 , 6.3.4 , 5.4 , 4.2 .


Participants : Édouard Canot, Jocelyne Erhel, Désiré Nuentsa Wakam.

Contract with ANR, program RNTL

Time: three years from October 2007.

Title: Large Information Base for the Research in AEROdynamics.

Coordinator: FLUOREM, Lyon.

Partners: LMFA, Ecole Centrale de Lyon; CDCSP, University of Lyon; Sage team.

This work is done in the context of the CINEMAS2 project, described above. The main objective for the team Sage is to design efficient algorithms adapted to industrial configurations using the Turb-Opty software developed by Fluorem and LMFA. The challenge is to solve many linear systems of large size. In 2010, we have worked on multilevel parallelism and deflation methods. See section 6.1.1 , 6.1.2 .

GENCI: project on advanced linear solvers

Participants : Édouard Canot, Désiré Nuentsa Wakam, Jocelyne Erhel, Baptiste Poirriez, Nadir Soualem, Géraldine Pichot.


To run large simulations, we defined a project, based on H2OLab and GPREMS, accepted by Genci. We got accounts on the cluster IBM Power 6 located at IDRIS: 3.584 cores Power6, 17,5 Tos of memory, 67,3 Tflops total peak performance, InfiniBand Network x4 DDR. In 2010, we obtained 64000 hours which were entirely used (see sections 5.4 and 5.5 ).

INRIA Large Wingspan intiative: HEMERA project

Participants : Jocelyne Erhel, Baptiste Poirriez, Nadir Soualem, Géraldine Pichot.

Title: Hemera

Time: from September 2010.

Coordinator: C. Perez, GRAAL team.

Partners: 22 INRIA teams.


Hemera is an INRIA Large Wingspan project, started in 2010, that aims at demonstrating ambitious up-scaling techniques for large scale distributed computing by carrying out several dimensioning experiments on the Grid’5000 infrastructure, at animating the scientific community around Grid’5000 and at enlarging the Grid’5000 community by helping newcomers to make use of Grid’5000.

The team Sage is the leader of the Scientific Challenge Hydro: Multi-parametric intensive stochastic simulations for hydrogeology. The objective is to run multiparametric large scale simulations. We will use software and middleware of the H2OLab platform and the Grid'5000 infrastructure.


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