Publication
Control of axisymmetric vortex breakdown in a constricted pipe: Nonlinear steady states and weakly nonlinear asymptotic expansions
Publications associées (34)
Approximation numérique des écoulements turbulents dans des cuves d'électrolyse de l'aluminium
Aluminium is a metal extracted from bauxite ore using electrolysis process in cells of big size. A huge electric current goes in the cell through an electrolytic bath and aluminium liquid. These currents generate strong magnetic forces that allow the bath ...
EPFL2016MATHICSE Technical Report : Semi-implicit BDF time discretization of the Navier-Stokes equations with VMS-LES modeling in a High Performance Computing framework
In this paper, we propose a semi–implicit approach for the time discretization of the Navier–Stokes equations with Variational Multiscale–Large Eddy Simulation turbulence modeling (VMS–LES). For the spatial approximation of the problem, we use the Finite E ...
MATHICSE2015Sensitivity of aerodynamic forces in laminar and turbulent flow past a square cylinder
François Gallaire, Edouard Boujo, Philippe Meliga
We use adjoint-based gradients to analyze the sensitivity of the drag force on a square cylinder. At Re = 40, the flow settles down to a steady state. The quantity of interest in the adjoint formulation is the steady asymptotic value of drag reached after ...
Amer Inst Physics2014Shape optimization for viscous flows by reduced basis methods and free-form deformation
Alfio Quarteroni, Gianluigi Rozza, Andrea Manzoni
In this paper we further develop an approach previously introduced in [Lassila and Rozza, C.M.A.M.E 2010] for shape optimization that combines a suitable low-dimensional parametrization of the geometry (yielding a geometrical reduction) with reduced basis ...
Wiley-Blackwell2012Optimal open-loop control of the recirculation length in the wake of a cylinder
François Gallaire, Edouard Boujo
We consider steady equilibrium solution of the 2-D Navier-Stokes equations describing the flow around a circular cylinder. It is well known that, for moderate Reynolds numbers, the recirculation length is an increasing function of the Reynolds number. We f ...
2012Numerical simulation of two-phase flow with interface tracking by adaptive Eulerian grid subdivision
Jacques Rappaz, Alexandre Caboussat, Pascal Clausen
A numerical model for the simulation of three-dimensional liquid-gas flow with free surfaces is presented. The incompressible Navier-Stokes equations are assumed to hold in the liquid domain, while the surrounding gas is assumed to be compressible, with co ...
2012Model reduction techniques for fast blood flow simulation in parametrized geometries
Alfio Quarteroni, Gianluigi Rozza, Andrea Manzoni
In this paper we propose a new model reduction technique aimed at real-time blood flow simulations on a given family of geometrical shapes of arterial vessels. Our approach is based on the combination of a low-dimensional shape parametrization of the compu ...
2012Investigation on the Three-Dimensional Flow Mechanisms in Annular Axial Compressor Cascades for Aero Engines with Flow Control by Aspiration on the Hub and on the Blades
The axial compressor is an essential component of aero-engines and gas turbines. This work investigates how flow control by aspiration applied to the hub and to the blades of axial compressor wheels can improve the static pressure rise by preventing detrim ...
EPFL2011Characterization of the Flow Generated in an Annular Test Facility
Peter Ott, Dominique Charbonnier, Elia Colombo, Cécile Deslot
Annular cascades are particularly useful to study the three dimensional phenomena encountered in turbomachines. The Non-Rotating Annular Test Facility of the Swiss Federal Institute of Technology in Lausanne (EPFL) consists in a radial-axial inlet nozzle a ...
2011Fine Sediment release from a reservoir by controlled hydrodynamic mixing
Anton Schleiss, Giovanni De Cesare, Jolanda Maria Isabella Jenzer Althaus
Reservoir sedimentation is worldwide a problem and requires a sustainable solution. The idea of maintaining sediment in suspension by a jet induced artificial turbulence and releasing it through the water intake was tested in laboratory experiments. Theref ...
2011