Laboratoire de Mécanique des Fluides et d'Acoustique - UMR 5509

LMFA - UMR 5509
Laboratoire de Mécanique des Fluides et d’Acoustique
Lyon
France


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Accueil > Équipes > Turbulence & Instabilités > Publications T&I > Publications T&I 2018

Publications T&I 2018

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Numerical analysis of the flapping mechanism for a two-phase coaxial jet

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 (...)

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Spectral energy scaling in precessing turbulence

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 (...)

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A flow-pattern map for phase separation using the Navier–Stokes–Cahn–Hilliard model

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 (...)

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A new strategy for the numerical modeling of a weld pool

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 (...)

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Critical velocity in ventilated tunnels in the case of fire plumes and densimetric plumes

Article dans Fire Safety Journal (2018)

Critical velocity in ventilated tunnels in the case of fire plumes and densimetric plumes

Lei Jiang, Mathieu Creyssels, Antoine Mos & Pietro Salizzoni

We focus on the critical velocity in longitudinally ventilated tunnels and on its dependence on the power of the fire source. In particular we aim at identifying the reason for the appearance of (...)

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Vertical drafts and mixing in stratified turbulence : Sharp transition with Froude number

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 (...)

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Three-dimensional instability of a flow past a sphere : Mach evolution of the regular and Hopf bifurcations

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 (...)

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