General Overview

The "Computer Science Laboratory for Mechanics and Engineering Sciences" (LIMSI) is a pluri-disciplinary research laboratory gathering academics and scholars from various scientific fields: primarily from the Engineering and Information Sciences, but also from Cognitive Science and Linguistics.

From the administrative point of view, LIMSI (UPR3251) is a CNRS laboratory tightly associated with University Paris-Saclay. LIMSI also develops collaborations with other universities and Engineering schols within University Paris-Saclay.


The laboratory was created in 1972 under the leadership of Lucien Malavard, with an initial focus on Numerical Fluid Mechanics, Acoustics, and Signal Processing. Our research themes have progressively been expanded to Speech and Image Processing, then to a growing number of themes related to Human-Computer Communication and Interaction on the one hand; to Thermics and Energetics on the other hand.

Resarch themes

Today, our research is organized in four main themes, spanning the activities of 9 research groups:
- Fluid Mechanics remains one of our main research areas, with an expertise in the development of advanced numerical methodologies associated to experiments in academic configurations: the AERO and  ETCM groups both contribute activities related to large-scale numerical simulations, to incertainty quantification, to the characterization of fluid dynamics (instabilities, turbulence), to the control of flows, and to multiphysic couplings;
- Energetics and the study of Mass and Heat Transfer: we carry out fundamental research aimed at a better understanding of transfer phenomena in convection and radiation, in multiphasic and oscillating conditions, and at extremely low temperatures. The ETCM and  TSF groups also study the analysis of large thermic systems with application to housing and solar energy.
- Natural Language Processing, applied to spoken, written, and signed language is another main research theme at LIMSI. Three  groups, TLP, and ILES contribute to a wide spectrum of activities ranging from acoustic signal processing, automatic speech recognition and synthesis, to semantic modeling and fine-grained question answering, also including multimedia indexing, machine translation, the analysis and generation of emotions in speech and text, and information extraction;
- research in Human-Machine Interaction aims at a deeper understanding and modeling of interactions between humans and artificial systems in various contexts, and along various modalities. Four research teams are concerned: AMI focuses mostly on tangible, haptic, gestual and ambiant interactions, whereas CPU is more focused on verbal and non-verbal interactions with virtual agents; interactions in virtual and augmented reality environments are studied primarily in the  AMI, and VENISE research groups.

Many research groups share similar or related interests and application domains; this is especially the case for collaborative research projects at the frontier between Science and Arts. VIDA is a tranverse action with the mission to coordinate LIMSI's activities in this domain, as well as to organize events, for instance under the umbrella of the "Diagonale Paris-Saclay".

Support staff

To carry out our research program, four internal support teams take responsability for making our day-to-day life easy:
- SAFT is in charge of all the management of our financial and human resources, as well as our valorisation activities, and the general maintenance and security of our premises;
- AMIC is responsible for operating the computing and network services;
- the mission of P2I is to provide the expertise necessary to develop our large-scale simulation codes and software platforms (including visualization and distributed storage architecture), as well as to run and operate all the experimental rooms and equipments (our experimental resources are documented on this page).
- CTEMO's technical competencies in Mechanics, Electronics and Optics are another valuable asset of the lab: they contribute to the development of experiments: installations of experimental manipulations, design and shaping of workpieces, and metrology.

The organizational charts of the laboratory can be downloaded here.

Campus universitaire bât 507
Rue du Belvédère
F - 91405 Orsay cedex
Tél +33 (0) 1 69 15 80 15


Scientific report

LIMSI in numbers

8 Research Teams
100 Researchers
40 Technicians and Engineers
60 Doctoral Students
70 Trainees


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