Publication
On Some Weighted Stokes Problems. Application on Smagorinsky Models
Publications associées (36)
WILD SOLUTIONS TO SCALAR EULER-LAGRANGE EQUATIONS
. We study very weak solutions to scalar Euler-Lagrange equations associated with quadratic convex functionals. We investigate whether W1,1 solutions are necessarily W 1,2 Nash and Schauder applicable. We answer this question positively for a suitable clas ...
Amer Mathematical Soc2024LDP and CLT for SPDEs with transport noise
In this work we consider solutions to stochastic partial differential equations with transport noise, which are known to converge, in a suitable scaling limit, to solution of the corresponding deterministic PDE with an additional viscosity term. Large devi ...
SPRINGER2023On the Capability of Wall-Modeled Large Eddy Simulations to Predict Particle Dispersion in Complex Turbulent Flows
Mohamed Aly Hashem Mohamed Sayed
Predicting particle transport in turbulent flows has a plethora of applications, some of which are: the transport of atmospheric aerosols, the deposition of blood cells in the arteries of human bodies and the atomization of fuel droplets in combustion cham ...
EPFL2022Data-Driven Reduced-Order Modeling of Convective Heat Transfer in Porous Media
This work presents a data-driven Reduced-Order Model (ROM) for parametric convective heat transfer problems in porous media. The intrusive Proper Orthogonal Decomposition aided Reduced-Basis (POD-RB) technique is employed to reduce the porous medium formul ...
MDPI2021A first-order primal-dual method with adaptivity to local smoothness
Volkan Cevher, Maria-Luiza Vladarean
We consider the problem of finding a saddle point for the convex-concave objective , where is a convex function with locally Lipschitz gradient and is convex and possibly non-smooth. We propose an ...
2021Comparison of Reduced-Basis techniques for the model order reduction of parametric incompressible fluid flows
The applicability of two Reduced-Basis techniques to parametric laminar and turbulent incompressible fluid flow problems in nuclear engineering is studied in this work. The Reduced-Basis methods are used to generate Reduced-Order Models (ROMs) that can acc ...
PERGAMON-ELSEVIER SCIENCE LTD2020Modeling turbulent stream flows over rough permeable beds
Christophe Ancey, Ivan Pascal, Gauthier Paul Daniel Marie Rousseau
In steep streams, turbulent flows run over coarse sediments that are similar in size to flow depth. Under these conditions, a significant part of the flow may seep through the permeable bed. Based on experimental data, this paper presents a model able to r ...
CRC Press2020A Multi-Agent Primal-Dual Strategy for Composite Optimization over Distributed Features
Ali H. Sayed, Sulaiman A S A E Alghunaim, Ming Yan
This work studies multi-agent sharing optimization problems with the objective function being the sum of smooth local functions plus a convex (possibly non-smooth) function coupling all agents. This scenario arises in many machine learning and engineering ...
IEEE2020Turbulent Flows over Rough Permeable Beds in Mountain Rivers: Experimental Insights and Modeling
Gauthier Paul Daniel Marie Rousseau
Steep mountain streams exhibit shallow waters with roughness elements such as stones and pebbles that are comparable in size to flow depth. Owing to the difficulty in measuring fluid velocities at the interface, i.e., from the rough permeable bed to the fr ...
EPFL2019GPU-accelerated Pelton turbine simulation using finite volume particle method coupled with linear eddy viscosity models
François Avellan, Ebrahim Jahanbakhsh, Audrey Paulette Solange Maertens, Sebastián Camilo Leguizamón Sarmiento, Siamak Alimirzazadeh, Takashi Kumashiro
The numerical investigation of the unsteady flow patterns around a Pelton bucket can be helpful to improve the overall turbine efficiency by optimizing the bucket design based on identified loss mechanisms. Since the flow is highly turbulent, modeling the ...
IOP PUBLISHING LTD2019