Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Savin, Eric"'
Autor:
Akian, Jean-Luc, Savin, Éric
Publikováno v:
Wave Motion 2024
We study the propagation of high-frequency electromagnetic waves in randomly heterogeneous bianisotropic media with dissipative properties. For that purpose we consider randomly fluctuating optical responses of such media with correlation lengths com
Externí odkaz:
http://arxiv.org/abs/2309.14223
Publikováno v:
J. Comput. Phys. 2022
This paper introduces algorithms to select/design kernels in Gaussian process regression/kriging surrogate modeling techniques. We adopt the setting of kernel method solutions in ad hoc functional spaces, namely Reproducing Kernel Hilbert Spaces (RKH
Externí odkaz:
http://arxiv.org/abs/2206.02563
This paper is concerned with the development of imaging methods to localize sources or reflectors in inhomogeneous moving media with acoustic waves that have travelled through them. A typical example is the localization of broadband acoustic sources
Externí odkaz:
http://arxiv.org/abs/2011.07817
The uncertainty associated with the experimental inflow in a wind tunnel affects the prediction of the flow of interest by numerical simulations. We evaluate this impact using uncertainty quantification. A method is developed and applied to the simul
Externí odkaz:
http://arxiv.org/abs/2007.12517
Publikováno v:
SIAM Multiscale Modeling and Simulation 18(2), 798-823 (2020)
We consider the scattering of acoustic waves emitted by an active source above a plane turbulent shear layer. The layer is modeled by a moving random medium with small spatial and temporal fluctuations of its mean velocity, and constant density and s
Externí odkaz:
http://arxiv.org/abs/2003.04017
Autor:
Akian, Jean-Luc, Savin, Éric
Publikováno v:
SIAM Multiscale Modeling and Simulation 19(3), 1394-1424 (2021)
We study the propagation of sound waves in a three-dimensional, infinite ambient flow with weak random fluctuations of the mean particle velocity and speed of sound. We more particularly address the regime where the acoustic wavelengths are comparabl
Externí odkaz:
http://arxiv.org/abs/1710.03621
Autor:
Savin, Éric, Faverjon, Béatrice
Publikováno v:
International Journal for Numerical Methods in Engineering 111(12), 1192-1200 (2017)
Because of the complexity of fluid flow solvers, non-intrusive uncertainty quantification techniques have been developed in aerodynamic simulations in order to compute the quantities of interest required in an optimization process, for example. The o
Externí odkaz:
http://arxiv.org/abs/1607.01914
Publikováno v:
In Journal of Sound and Vibration 3 March 2021 494
This paper deals with some of the methodologies used to construct polynomial surrogate models based on generalized polynomial chaos (gPC) expansions for applications to uncertainty quantification (UQ) in aerodynamic computations. A core ingredient in
Externí odkaz:
http://arxiv.org/abs/1506.02318