Les activités de l’équipe, à caractère plutôt fondamentales, concernent l’analyse des instabilités hydrodynamiques, la transition laminaire/turbulence, les écoulements turbulents, et les écoulements à petite échelle.
Les actualités de T&I :
Soutenance de thèse INSA
Virgile Tavernier
Mercredi 19 décembre 2018 à 9h30 à l’INSA Lyon, en salle René Char (Bâtiment "La Rotonde)
Modélisation numérique de la solidification et de la ségrégation des impuretés lors de la croissance du silicium photovoltaïque à l’aide d’une méthode originale de maillage glissant
Les panneaux (...)
Article dans Eur. J. Mech. B-Fluids (2019)
The size and lifetime of organised eddies in a non-solid-body rotating turbulence experiment
Lian Gan & Andrea Maffioli
This paper follows our previous study of forced non-solid-body rotating turbulence and summarises results on the eddy size and lifetime in the same flow. The experiment is conducted in a (...)
Article dans Comptes Rendus Mécanique (2018)
A new strategy for the numerical modeling of a weld pool
Yassine Saadlaoui, Éric Feulvarch, Alexandre Delache, Jean-Baptiste Leblond & Jean-Michel Bergheau
Welding processes involve high temperatures and metallurgical and mechanical consequences that must be controlled. For this purpose, numerical simulations have been developed to study the effects (...)
Article dans Europhys. Lett. (2018)
Vertical drafts and mixing in stratified turbulence : Sharp transition with Froude number
Fabio Feraco, Raffaele Marino, Alain Pumir, Leonardo Primavera, Pablo D. Mininni, Annick Pouquet & Duane Rosenberg
We investigate the large-scale intermittency of vertical velocity and temperature, and the mixing properties of stably stratified turbulent flows using both Lagrangian and Eulerian fields from (...)
Article dans J. Fluid Mech. (2018)
Three-dimensional instability of a flow past a sphere : Mach evolution of the regular and Hopf bifurcations
Andrea Sansica, Jean-Christophe Robinet, Frédéric Alizard & Éric Goncalvès
A fully three-dimensional linear stability analysis is carried out to investigate the unstable bifurcations of a compressible viscous fluid past a sphere. A time-stepper technique is used to (...)
Article dans Eur. J. Mech. B-Fluids (2018)
A flow-pattern map for phase separation using the Navier–Stokes–Cahn–Hilliard model
Aurore Naso & Lennon Ó Náraigh
We use the Navier–Stokes–Cahn–Hilliard model equations to simulate phase separation with flow. We study coarsening — the growth of extended domains wherein the binary mixture phase separates into its (...)
Article dans Phys. Rev. E (2018)
Spectral energy scaling in precessing turbulence
A. Khlifi, A. Salhi, S. Nasraoui, F. Godeferd & C. Cambon
We study precessing turbulence, which appears in several geophysical and astrophysical systems, by direct numerical simulations of homogeneous turbulence where precessional instability is (...)
Article dans Int. J. Multiph. Flow (2018)
Numerical analysis of the flapping mechanism for a two-phase coaxial jet
Nicolas Odier, Guillaume Balarac & Christophe Corre
A numerical study of a coaxial liquid jet sheared by an annular high-speed stream is performed at moderate density and velocity ratio between phases. The destabilization mechanism of the jet is (...)
Article dans Phys. Rev. Fluids (2018)
Turbulence and turbulent pattern formation in a minimal model for active fluids
Martin James, Wouter J. T. Bos, and Michael Wilczek
Active matter systems display a fascinating range of dynamical states, including stationary patterns and turbulent phases. While the former can be tackled with methods from the field of pattern (...)
Article dans Flow Turbul. Combust. (2018)
Effects of Discrete Energy and Helicity Conservation in Numerical Simulations of Helical Turbulence
Francesco Capuano & Donato Vallefuoco
Helicity is the scalar product between velocity and vorticity and, just like energy, its integral is an inviscid invariant of the three-dimensional incompressible Navier-Stokes equations. (...)
Article dans J. Turbul. (2018)
Advanced spectral anisotropic modelling for shear flows
Antoine Briard, T Gomez & Claude Cambon
In this work, the spectral modelling developed in MCS (Mons, Cambon, Sagaut. J Fluid Mech. 2016) for shear-driven turbulence is further analysed and then improved. First, using self-similarity (...)