Welcome to LIMSI

LIMSI, a strongly multi-disciplinarity laboratory, hosts researchers from Engineering Sciences and Computer Science, but also from  Life Sciences and Social Sciences. Its scientific field covers Natural Language Processing, Human-Machine Interaction, Augmented and Virtual Reality, Fluid Mechanics, and Energetics. 
We share a common long-term goal, which is to improve the well-being of man in their surrounding environment, both from a material and immaterial point of view.

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Research groups

Our research is organized in four main themes, spanning the activities of 9 research groups:
  • Fluid Mechanics, with an expertise in the development of advanced numerical methodologies associated to experiments in academic configurations (AERO and ETCM)
  • Energetics and the study of Mass and Heat Transfer with fundamental research related to applied context (ETCM and TSF)
  • Natural Language Processing, applied to spoken, written, and signed languagetual ranging from acoustic signal processing to semantic modeling (TLP and ILES)
  • Human-Machine Interaction aiming at a deeper understanding and model of interactions in various contexts and along various modalities, including Virtual and Augmented Reality (AMI, CPU and VENISE)
VIDA is a tranverse action whose mission is to coordinate research projects at the frontier of Science and Arts, with the collaboration of artists and designers.

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Unsteady Aerodynamics: Turbulence and Control

The simulation of realistic flows  and analysis of experimental or numerical databases  for geophysical, industrial or biological applications requires the development of  numerical methods. The AERO group develops fundamental research on advanced  numerical methods in the context of high performance computing (HPC). This work has led to the development of original methods for  flow analysis, prediction and control. 

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Achitecture and Models for Interaction

The emergence in recent years of new classes of users, new software and hardware platforms and new interaction environments and contexts (mobility) has shifted our attention from static interaction situations to open and dynamic ones. This is the reason why the AMI group focuses on post-WIMP interaction paradigms where the hands on experience of the physical world is important, such as tangible user interfaces to manipulate physical objects, tactile surfaces, or 3D interactions. Besides, ambient environments and augmented reality spaces provide the designers of new interfaces with new modalities and new requirements, thus enriching the traditional issues in multimodal interfaces.

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Cognition, Perception and Uses

The goal of the CPU group (Cognition, Perception, Use) is to conduct pluridisciplinary research with the joint perspective from Psychology, Ergonomics and Computer Science in order to address research questions about (or that can be useful for) the design or evaluation of Human-Computer Interaction.

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Transitional Flows and MultiPhysics Couplings

The research activities of the ETCM group are devoted to the dynamics of external or internal flows by numerical, analytical and experimental methods. We are particularly interested in the study of flow instabilities, the transitional regimes or the turbulent tregimes of these flows. The sources of instabilities include mass or temperature gradients, the parietal friction, the interfacial tension, the Lorentz force, the thermo-acoustic coupling, phase changes, etc. To deepen the physical understanding of destabilization mechanisms, we develop cutting-edge numerical tools and are committed to a new experimental activity.


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Information, Written and Signed Language

ILES specifically addresses the analysis, understanding and production of written language, and the modelling and production of signed language. Natural language processing aims to process human language in such a way that the results of this processing make sense for humans, i.e., meet their expectations. It aims to design computer programs that can understand or emulate human communication, e.g. by analysing documents and extracting task-relevant information, helping in the production of documents (spell checkers, style checkers, controlled language editors), generating a whole document (text summarizer), or answering questions based on text or more structured content.

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Spoken Language Processing
The Spoken Language Processing group carries out research aimed at understanding the human speech communication processes and developing models for use in automatic processing of speech. With the aim of extracting and structuring information in audio documents, the group develops models and algorithms that use diverse sources of information to carry out a global decoding of the signal, that can be applied to identify the speaker, the language being spoken and the speaker affective state, to transcribe the speech or translate it, or identify specific entities. This research is by nature interdisciplinary, drawing upon expertise in signal processing, acoustic-phonetics, phonology, semantics, statistics and computer science.

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Solid-Fluid Transfer

The specificity of the Solid-Fluid Transfer group relies in its know-how in Heat transfer and Energetics. In the broad field of Heat transfer and Energetics, which is constantly revisited by new experimental techniques (e.g. optical velocimetry), new materials, or new challenges (e.g. micro- and nano-scales), the Solid-Fluid Transfer group explores four domains:

  • Two-phase flows, dynamics and transfers,
  • Oscillating flows, dynamics and transfers,
  • Heat transfer in solid/superfluid and in micro-nano junctions
  • Applied convective transfers and Solar energies


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VENISE is the Virtual & Augmented Reality (V&AR) research team of the CNRS/LIMSI lab. Our research aims at developing methods and tools to make immersive and collaborative interactions more "natural" or more intuitive, either in virtual worlds or in virtual worlds coupled to the real one. We strive at making our models generic enough so that they apply to a large range of immersive environments, such as collaborative (RAVE, CAVE, Workbench ...), individual (HMD, see-through ...), or multi-sensorimotor (stereoscopic, 3D audio, haptic…).

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Virtuality, Interaction, Design & Art
VIDA (Virtuality, Interaction, Design, & Art) is a transverse action at LIMSI supporting and promoting collaborations between engineering sciences and creative domains of contemporary arts (visual arts, dance, music, theater, and performance) including also design and architecture. VIDA activities gather members of various groups at LIMSI.

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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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