A5036893667- Fluid Dynamics and Turbulent Flows
- Meteorological Phenomena and Simulations
- Combustion and flame dynamics
- Geotechnical and Geomechanical Engineering
- Solar and Space Plasma Dynamics
- Climate variability and models
- Computational Fluid Dynamics and Aerodynamics
- Methane Hydrates and Related Phenomena
- Wind and Air Flow Studies
- Evolutionary Game Theory and Cooperation
- Energy Load and Power Forecasting
- Engineering and Agricultural Innovations
- Cyclone Separators and Fluid Dynamics
- Oil and Gas Production Techniques
- Fluid Dynamics and Heat Transfer
- Atmospheric and Environmental Gas Dynamics
- Neural Networks and Applications
- Opportunistic and Delay-Tolerant Networks
- Distributed systems and fault tolerance
- Industrial Engineering and Technologies
- Computational Physics and Python Applications
- Engineering Diagnostics and Reliability
Institut des Géosciences de l'Environnement
2024
Centre National de la Recherche Scientifique
2020-2024
Institut polytechnique de Grenoble
2021-2024
Institut de Recherche pour le Développement
2023-2024
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2023-2024
Université Grenoble Alpes
2020-2024
Environmental Earth Sciences
2023
Columbia University
2023
École Polytechnique
2022
Laboratoire de Physique et Modélisation des Milieux Condensés
2020-2021
We use direct numerical simulations (DNSs) of the forced Navier–Stokes equation for a three-dimensional incompressible fluid in order to test recent theoretical predictions. study two- and three-point spatiotemporal correlation functions velocity field stationary, isotropic, homogeneous turbulence. compare our results predictions from Functional Renormalization Group (FRG) which were obtained large wavenumber limit. DNSs are performed at various Reynolds numbers correlations analyzed...
To determine how a fluid carries its energy down to microscopic scales where it is dissipated, result from the assumption-free theory of nonperturbative renormalization group was tested, using numerical simulations and data ONERA wind tunnel. The findings confirm that kinetic spectrum follows predicted stretched exponential in dissipation range .
Using direct numerical simulations we study the spatiotemporal correlations of passive scalars advected both by Navier-Stokes flow and synthetic velocity fields. Beyond their global behavior, which is either a Gaussian or an exponential decay in time, depending on carrier flow, determine with accuracy prefactors exponents, find remarkable agreement recent results from functional renormalization group.
The physical characteristics and the methodology of mathematically describing numerically analyzing shell a curvilinear pipeline with wave process in liquid flow are discussed. is assumed to be caused by hydraulic shock resulting from change resistance hydrosystem. To demonstrate approach determining stressedstrained state developing pipeline, an example analyzed. It shown that for certain combination parameters, resonance possible considerable stresses pipeline. Key words: shock,...
Numerical simulation of non-stationary vortical plasma-gas-dynamic structures formed in a swirl flow the open tube under RF-electromagnetic field is conducted. It shown that when external RF-field coincides with resonator’s eigenfrequency, an abrupt jump gas-dynamic fluctuations and corresponding changes discharge structure take place.
The precessing vortex core (PVC) is a crucial structure for many technical devices with the heat release. For this purpose, we performed 3D numerical simulations of PVC in swirling flow created open tube paraxial nonstationary source. Power source was modulated by sinusoidal law. We showed that three turbulence models give qualitatively similar dependences frequency and amplitude on heat-source power. simulation demonstrated obtained left-handed co-rotated bending single-vortex structure....
The results of analytically investigating the dynamics a curvilinear pipeline simple geometry with wave process in liquid flow are presented. It is shown that, when natural vibration frequencies close to or coincide main harmonic induced hydrodynamic force, there risk exciting forced oscillations pipeline. 176 intended for controlling functioning available software complex and obtaining qualitative insight into character processes their dependence on parameters perturbation. Keywords:...
The notion of adversary is a staple distributed computing. An typically models "hostile" assumptions about the underlying environment, e.g., network that can drop messages, an operating system delay processes or attacker hack machines. So far, goal computing researchers has mainly been to develop algorithm face given adversary, abstraction characterizing worst-case scenarios. This paper initiates study somehow opposite approach. Given algorithm, we seek implement. More specifically, consider...
We study the spatio-temporal two-point correlation function of passively advected scalar fields in inertial-convective range three dimensions by means numerical simulations. show that at small time delays $t$ correlations decay as a Gaussian variable $tp$ where $p$ is wavenumber. At large delays, crossover to an exponential $tp^2$ expected from recent functional renormalization group (FRG) analysis. this regime for field Kraichnan's ``synthetic'' velocity field, and accurately confirm FRG...