59 citations · 446 across the 20 of their papers we have counts for
20 papers
Meltwater transport and mixing layer growth near the ice--ocean interface
Sofía Allende, Louis-Alexandre Couston, Simon Thalabard +1
Ice melting into saline water plays a fundamental role in the dynamics near the ice-ocean interface in polar oceans. The physics of ice melting involves a non-trivial interplay bet…
Turbulent ice-ocean boundary layers in the well-mixed regime: insights from direct numerical simulations
Louis-Alexandre Couston
The meltwater mixing line (MML) model provides a theoretical prediction of near-ice water mass properties that is useful to compare with observations. If oceanographic measurements…
Competition between Rayleigh--Bénard and horizontal convection
Louis-Alexandre Couston, Joseph Nandaha, Benjamin Favier
We investigate the dynamics of a fluid layer subject to an imposed bottom heat flux and a top monotonically-increasing temperature profile driving horizontal convection. We use dir…
Surface Manifestation of Stochastically Excited Internal Gravity Waves
Daniel Lecoanet, Matteo Cantiello, Evan H. Anders +5
Recent photometric observations of massive stars show ubiquitous low-frequency "red-noise" variability, which has been interpreted as internal gravity waves (IGWs). Simulations of…
Turbulent Convection in Subglacial Lakes
Louis-Alexandre Couston
Subglacial lakes are isolated, cold-temperature and high-pressure water environments hidden under ice sheets, which might host extreme microorganisms. Here, we use two-dimensional…
Dynamic flows create potentially habitable conditions in Antarctic subglacial lakes
Louis-Alexandre Couston, Martin Siegert
Trapped beneath the Antarctic ice sheet lie over 400 subglacial lakes, which are considered to be extreme, isolated, yet viable habitats for microbial life. The physical conditions…
Aspect ratio affects iceberg melting
Eric W. Hester, Craig D. McConnochie, Claudia Cenedese +2
Iceberg meltwater is a critical freshwater flux from the cryosphere to the oceans. Global climate simulations therefore require simple and accurate parameterisations of iceberg mel…
The Science Case for a Titan Flagship-class Orbiter with Probes
Conor A. Nixon, James Abshire, Andrew Ashton +36
We outline a flagship-class mission concept focused on studying Titan as a global system, with particular emphasis on the polar regions. Investigating Titan from the unique standpo…
Improved phase-field models of melting and dissolution in multi-component flows
Eric W. Hester, Louis-Alexandre Couston, Benjamin Favier +2
We develop and analyse the first second-order phase-field model to combine melting and dissolution in multi-component flows. This provides a simple and accurate way to simulate cha…
Landslide Tsunamis in Lakes
Louis-Alexandre Couston, Chiang C Mei, Mohammad-Reza Alam
Landslides plunging into lakes and reservoirs can result in extreme wave runup at shores. This phenomenon has claimed lives and caused damage to near-shore properties. Landslide ts…
Fabry-Perot resonance of water waves
Louis-Alexandre Couston, Qiuchen Guo, Maysamreza Chamanzar +1
We show that significant water wave amplification is obtained in a water resonator consisting of two spatially separated patches of small-amplitude sinusoidal corrugations on an ot…
Topography generation by melting and freezing in a turbulent shear flow
Louis-Alexandre Couston, Eric Hester, Benjamin Favier +3
We report an idealized numerical study of a melting and freezing solid adjacent to a turbulent, buoyancy-affected shear flow, in order to improve our understanding of topography ge…
Low-frequency variability in massive stars: Core generation or surface phenomenon?
Daniel Lecoanet, Matteo Cantiello, Eliot Quataert +6
Bowman et al. (2019) reported low-frequency photometric variability in 164 O- and B-type stars observed with K2 and TESS. They interpret these motions as internal gravity waves, wh…
Shape and size of large-scale vortices: A generic fluid pattern in geophysical fluid dynamics
Louis-Alexandre Couston, Daniel Lecoanet, Benjamin Favier +1
Planetary rotation organizes fluid motions into coherent, long-lived swirls, known as large-scale vortices (LSVs), which play an important role in the dynamics and long-term evolut…
The energy flux spectrum of internal waves generated by turbulent convection
Louis-Alexandre Couston, Daniel Lecoanet, Benjamin Favier +1
We present three-dimensional direct numerical simulations of internal waves excited by turbulent convection in a self-consistent, Boussinesq and Cartesian model of convective--stab…
Order Out of Chaos: Slowly Reversing Mean Flows Emerge from Turbulently Generated Internal Waves
Louis-Alexandre Couston, Daniel Lecoanet, Benjamin Favier +1
We demonstrate via direct numerical simulations that a periodic, oscillating mean flow spontaneously develops from turbulently generated internal waves. We consider a minimal physi…
Rogue Wave Morphology in Broadband Nonbreaking Seas
Qiuchen Guo, Louis-Alexandre Couston, Mohammad-Reza Alam
Here, we show through a statistical analysis that rogue waves in broadband non-breaking seas are spatially asymmetric. In addition to the top-down asymmetry due to nonlinear effect…
Dynamics of Mixed Convective--Stably-Stratified Fluids
L. -A. Couston, D. Lecoanet, B. Favier +1
We study the dynamical regimes of a density-stratified fluid confined between isothermal no-slip top and bottom boundaries (at temperatures and ) via direct numerical si…
Dominant Resonance in Parametric Subharmonic Instability of Internal Waves
Yong Liang, Louis-Alexandre Couston, Qiuchen Guo +1
Parametric Subharmonic Instability (PSI) is one of the most important mechanisms that transfer energy from tidally-generated long internal waves to short steep waves. Breaking of t…
Oblique internal-wave chain resonance over seabed corrugations
Louis-Alexandre Couston, Yong Liang, Mohammad-Reza Alam
We show that monochromatic long-crested corrugations on an otherwise flat seafloor can coherently scatter the energy of an oblique incident internal wave to multiple multi-directio…