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Bienvenue - Laboratoire Jacques-Louis Lions




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Internships (Year 10 / Year 11 students)
Job shadowing (Year 10, Year 11 students) See
5 ATER positions in Mathematics at Sorbonne University
deadline : 5 April at 4 p.m.
Details here

Key figures

Key figures

189 people work at LJLL

90 permanent employees

82 researchers and permanent lecturers

8 engineers, technicians and administrative staff

99 non-permanent staff

73 Phd students

14 Post-doc and ATER

12 distinguished and volunteer contributors


Figures : March 2019


Be careful : The WG Numerical Methods becomes Meetings Inria - LJLL in scientific calculation

from March. fenêtre fenêtre

Inria meetings - LJLL in scientific calculation I. Vignon-Clementel, M. Vohralik, F. Hecht




On Mondays at 11 a.m.,

 UMPC, LJLL, seminar room 15-16-309 (on the first Monday of the month)



 INRIA de Paris, 2 rue Simone Iff, seminar room Jacques-Louis Lions (on the third Monday of the month)


Exceptional meeting on Monday 12 December 2016 in the LJLL at 11 a.m., seminar room 15-16-309

Title : Enriched Galerkin approximation for coupled flow and transport problems

Mary F. Wheeler
The Center for Subsurface Modeling,
Institute for Computational Engineering and Sciences,
The University of Texas at Austin, Texas, USA

present and analyze Enriched Galerkin finite element methods (EG) to
solve coupled flow and transport system with jump coefficients referred as
miscible displacement problems.

EG is formulated by enriching the conforming Continuous Galerkin finite
element method (CG) with piecewise constant functions.
This approach is shown to be locally and globally
conservative while keeping fewer degrees of freedom in comparison with Discontinuous Galerkin finite element methods (DG). Also, we present and analyze a fast and effective EG
solver for flow simpler than DG and whose cost is roughly that of CG and can handle an arbitrary order of approximations. Moreover, to avoid any spurious oscillations for the higher
order transport system, we employ an entropy residual stabilization technique. Dynamic mesh adaptivity using hanging nodes is applied to save computational cost for large-scale
physical problems. Some
numerical tests in two and three dimensions are presented to confirm
our theoretical results as well as to demonstrate the advantages of the
results for two phase flow in porous media are also discussed.

This work was done in collaboration with Sanghyun Lee and Young-Ju Lee.


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