10 citations · 28 across the 12 of their papers we have counts for
12 papers
A Versatile Laboratory Approach to Reproduce and Analyze Internal Ocean Wave Dynamics
Vohn Jacquez, Zachary Phan, Zachary Taebel +3
Internal waves, or waves that propagate within a stratified fluid, may break and cause mixing. While each individual mixing event may be small, collectively, internal wave breaking…
Experimental Investigation of Tidally-Forced Internal Wave Turbulence at High Reynolds Number
Zachary Taebel, Alberto Scotti, Pierre-Yves Passaggia +1
Through basin-scale circulations, the ocean regulates global distributions of heat, nutrients, and greenhouse gases. To properly predict the future of the ocean under climate chang…
Prediction of resistance induced by surface complexity in lubricating layers: Application to super-hydrophobic surfaces
Noura Bettaieb, Marco Castagana, Pierre-Yves Passaggia +2
Super Hydrophobic (SH) coatings are widely used to mitigate drag in various applications. Numerous studies have demonstrated that the beneficial wall-slip effect produced by these…
Limiting regimes of turbulent horizontal convection. Part II : Large Prandtl numbers
Pierre-Yves Passaggia, Nadia F. Cohen, Alberto Scotti +1
Horizontal Convection (HC) at large Rayleigh and Prandtl numbers, is studied experimentally in a regime up to seven orders of magnitude larger in terms of Rayleigh numbers than pre…
Limiting regimes of turbulent horizontal convection. Part I: Intermediate and low Prandtl numbers
Pierre-Yves Passaggia, Alberto Scotti, Brian L. White
We report the existence of two new limiting turbulent regimes in horizontal convection (HC) using direct numerical simulations at intermediate to low Prandtl numbers. The flow driv…
Transient energy growth in the ageostrophic Eady model
Varvara E. Zemskova, Pierre-Yves Passaggia, Brian L. White
The problem of optimal initial disturbances in thermal wind shear is revisited and extended to include non-hydrostatic effects. This systematic study compares transient and modal g…
An Isotropic Porous Medium Approach to Drag Mitigation Disappearance in Super-Hydrophobic Falling Spheres
Marco Castagna, Nicolas Mazellier, Pierre-Yves Passaggia +1
In this Letter, the falling of super-hydrophobic spheres is investigated experimentally at low Reynolds numbers. In particular, we show that super-hydrophobic coatings become ineff…
Heat and momentum transport in turbulent horizontal convection at low Prandtl numbers
Pierre-Yves Passaggia, Alberto Scotti, Brian L. White
The transition to a new turbulent regime in horizontal convection in the case of low Prandtl numbers is analyzed using the Shishkina, Grossmann & Lohse (SGL) theory. The flow drive…
Experimental investigation of nonlinear internal waves in deep water with miscible fluids
Roberto Camassa, Matthew W. Hurley, Richard M. McLaughlin +2
Laboratory experimental results are presented for nonlinear Internal Solitary Waves (ISW) propagation in deep water configuration with miscible fluids. The results are validated ag…
Optimal control of a separated boundary-layer flow over a bump
Pierre-Yves Passaggia, Uwe Ehrenstein
The optimal control of a globally unstable two-dimensional separated boundary layer over a bump is considered using augmented Lagrangian optimization procedures. The present strate…
Optimal transient growth in thin-interface internal solitary waves
Pierre-Yves Passaggia, Karl R. Helfrich, Brian L. White
The dynamics of perturbations to large-amplitude Internal Solitary Waves (ISW) in two-layered flows with thin interfaces is analyzed by means of linear optimal transient growth met…
A local diagnostic energy to study diabatic effects on a class of degenerate Hamiltonian systems with application to mixing in stratified flows
Alberto Scotti, Pierre-Yves Passaggia
In Hamiltonian systems characterized by a degenerate Poisson algebra, we show how to construct a local energy-like quantity that can be used to study diabatic effects on the evolut…