A5035736184- Computational Fluid Dynamics and Aerodynamics
- Fluid Dynamics and Turbulent Flows
- Combustion and flame dynamics
- Aerodynamics and Acoustics in Jet Flows
- Wind and Air Flow Studies
- Gas Dynamics and Kinetic Theory
- Solar Thermal and Photovoltaic Systems
- Phase Change Materials Research
- Plasma and Flow Control in Aerodynamics
- Fluid Dynamics and Vibration Analysis
- solar cell performance optimization
- Combustion and Detonation Processes
- Astrophysics and Cosmic Phenomena
- Advanced Combustion Engine Technologies
- Gamma-ray bursts and supernovae
- Heat Transfer Mechanisms
- Fluid Dynamics Simulations and Interactions
- Radiative Heat Transfer Studies
- Particle Dynamics in Fluid Flows
- Seismic Imaging and Inversion Techniques
- Rocket and propulsion systems research
- Model Reduction and Neural Networks
- Building Energy and Comfort Optimization
- Heat transfer and supercritical fluids
- Dark Matter and Cosmic Phenomena
Laboratoire de Mathématiques
2011-2024
Centre National de la Recherche Scientifique
2013-2024
Université de Pau et des Pays de l'Adour
2013-2024
Laboratoire de Mathématiques et de leurs Applications
2014-2023
Hewlett-Packard (United States)
2023
Centre National pour la Recherche Scientifique et Technique (CNRST)
2003-2022
École Polytechnique
2009-2021
Laboratoire Leprince-Ringuet
2009-2021
Laboratoire de Recherche Scientifique
2010
National Council for Scientific Research
2010
ABSTRACT We present a catalog of high-energy gamma-ray sources detected by the Large Area Telescope (LAT), primary science instrument on Fermi Gamma-ray Space (Fermi) , during first 11 months phase mission, which began 2008 August 4. The First -LAT (1FGL) contains 1451 and characterized in 100 MeV to GeV range. Source detection was based average flux over month period, threshold likelihood Test Statistic is 25, corresponding significance just 4σ. 1FGL includes source location regions,...
The origin of Galactic cosmic rays is a century-long puzzle. Indirect evidence points to their acceleration by supernova shockwaves, but we know little escape from the shock and evolution through turbulent medium surrounding massive stars. Gamma can probe spreading ambient gas radiation fields. Fermi Large Area Telescope (LAT) has observed star-forming region Cygnus X. 1- 100-gigaelectronvolt images reveal 50-parsec-wide cocoon freshly accelerated that flood cavities carved stellar winds...
We report the discovery by Large Area Telescope (LAT) onboard Fermi Gamma-ray Space of high-energy gamma-ray emission from peculiar quasar PMN J0948+0022 (z=0.5846). The optical spectrum this object exhibits rather narrow Hbeta (FWHM(Hbeta) ~ 1500 km s^-1), weak forbidden lines and is therefore classified as a narrow-line type I quasar. This class objects thought to have relatively small black hole mass accrete at high Eddington ratio. radio loudness variability compact core indicates...
The Large Area Telescope (LAT), the primary instrument for Fermi Gamma-ray Space (Fermi) mission, is an imaging, wide field-of-view, high-energy gamma-ray telescope, covering energy range from 30 MeV to more than 300 GeV. We describe performance of at 10-year milestone. LAT remains well within specifications defined during planning phase, validating design choices and supporting compelling case extend duration mission. details provided here will be useful when designing next generation observatories.
Based on the experience gained during four and a half years of mission, Fermi -LAT collaboration has undertaken comprehensive revision event-level analysis going under name Pass 8. Although it is not yet finalized, we can test improvements in new event reconstruction with special case prompt phase bright Gamma-Ray Bursts (GRBs), where signal to noise ratio large enough that loose selection cuts are sufficient identify gamma- rays associated source. Using reconstruction, have re-analyzed ten...
Abstract This work aims at developing/combining numerical tools adapted to the simulation of near field highly underexpanded jets. An overview challenging problems related complex shock/expansion structure encountered in these flows is given and an efficient low‐cost strategy proposed overcome these, even on short computational domains. Based common upwinding algorithms used unstructured meshes a mixed finite‐volume/finite‐element approach, it relies appropriate utilization zonal anisotropic...
Turbulent flows play a crucial role in various engineering and scientific applications, the accurate prediction of these remains challenging task. This review explores application Shear Stress Transport Scale-Adaptive Simulation (SST-SAS) turbulence model for solving incompressible turbulent flows, with specific focus on unsteady wakes behind bluff bodies. Providing concise overview model’s formulation its advantages, this article highlights efficacy SST-SAS simulating intricate dynamics...
The results of a detailed experimental analysis the e ows associated with bluff-body stabilized premixed combustion are presented. setup has been designed to facilitate as much possible test numerical predictions such ow geometry. boundary conditions well dee ned and easy reproduce from point view. reported here based principally on velocity measurements using four-beam two-color laser Doppler velocimeter. As far mean structure wakes is concerned cone rming in that respect literature, it...
An experimental study of inert and combusting flows developing over a plane-symmetric expansion is presented. The flow under investigation consists :of two fully developed turbulent channel air (inert flows) or plus propane (combusting that are emerging just ahead the sudden expansion. Such geometry has been chosen to test combustion models able take into account either variable-mixture composition (and) simultaneous presence large-scale coherent structures stochastic turbuience. present...
In this paper, the asymptotic behavior of a thermal latent-energy storage system undergoing periodic charge/ discharge cycles is numerically investigated. The consists cylindrical tank, which randomly packed with spheres having uniform sizes and encapsulating paraffin as phase change material. working fluid flowing through bed pure air. main part study, entrance air temperature supposed to vary in sinusoidal way one-day period. related governing equations are solved by control-volume-based...