187 citations · 1.3k across the 17 of their papers we have counts for
17 papers
The sensitivity of rapidly rotating Rayleigh--Bénard convection to Ekman pumping
Meredith Plumley, Keith Julien, Philippe Marti +1
The dependence of the heat transfer, as measured by the nondimensional Nusselt number , on Ekman pumping for rapidly rotating Rayleigh-Bénard convection in an infinite plane la…
The effects of Ekman pumping on quasi-geostrophic Rayleigh-Benard convection
Meredith Plumley, Keith Julien, Philippe Marti +1
Numerical simulations of 3D, rapidly rotating Rayleigh-Benard convection are performed using an asymptotic quasi-geostrophic model that incorporates the effects of no-slip boundari…
A nonlinear model for rotationally constrained convection with Ekman pumping
Keith Julien, Jonathan M. Aurnou, Michael A. Calkins +4
It is a well established result of linear theory that the influence of differing mechanical boundary conditions, i.e., stress-free or no-slip, on the primary instability in rotatin…
A New Model for Mixing By Double-Diffusive Convection (Semi-Convection). III. Thermal and Compositional Transport Through Non-Layered ODDC
Ryan Moll, Pascale Garaud, Stephan Stellmach
Oscillatory double-diffusive convection (ODDC) (also known as semi- convection) refers to a type of double diffusive instability that occurs in regions of planetary and stellar int…
Anelastic Versus Fully Compressible Turbulent Rayleigh-Bénard Convection
Jan Verhoeven, Thomas Wiesehöfer, Stephan Stellmach
Numerical simulations of turbulent Rayleigh-Bénard convection in an ideal gas, using either the anelastic approximation or the fully compressible equations, are compared. Theoretic…
Kinetic Energy Transport in Rayleigh--Bénard Convection
Klaus Petschel, Stephan Stellmach, Michael Wilczek +2
The kinetic energy balance in Rayleigh--Bénard convection is investigated for the Prandtl number range and for fixed Rayleigh number . The kin…
Approaching the Asymptotic Regime of Rapidly Rotating Convection: Boundary Layers vs Interior Dynamics
S. Stellmach, M. Lischper, K. Julien +5
Rapidly rotating Rayleigh-Bénard convection is studied by combining results from direct numerical simulations (DNS), laboratory experiments and asymptotic modeling. The asymptotic…
Double-diffusive mixing in stellar interiors in the presence of horizontal gradients
Michael Medrano, Pascale Garaud, Stephan Stellmach
We have identified an important source of mixing in stellar radiation zones, that would arise whenever two conditions are satisfied: (1) the presence of an inverse vertical composi…
The compressional beta effect: a source of zonal winds in planets?
Jan Verhoeven, Stephan Stellmach
Giant planets like Jupiter and Saturn feature strong zonal wind patterns on their surfaces. Although several different mechanisms that may drive these jets have been proposed over…
Dissipation Layers in Rayleigh-Bénard Convection: A Unifying View
K. Petschel, S. Stellmach, M. Wilczek +2
Boundary layers play an important role in controlling convective heat transfer. Their nature varies considerably between different application areas characterized by different boun…
Chemical Transport and Spontaneous Layer Formation in Fingering Convection in Astrophysics
Justin M. Brown, Pascale Garaud, Stephan Stellmach
A region of a star that is stable to convection according to the Ledoux criterion may nevertheless undergo additional mixing if the mean molecular weight increases with radius. Thi…
A new model for mixing by double-diffusive convection (semi-convection). II. The transport of heat and composition through layers
Toby S. Wood, Pascale Garaud, Stephan Stellmach
Regions of stellar and planetary interiors that are unstable according to the Schwarzschild criterion, but stable according to the Ledoux criterion, are subject to a form of oscill…
A new model for mixing by double-diffusive convection (semi-convection): I. The conditions for layer formation
Giovanni M. Mirouh, Pascale Garaud, Stephan Stellmach +2
The process referred to as "semi-convection" in astrophysics and "double-diffusive convection in the diffusive regime" in Earth and planetary sciences, occurs in stellar and planet…
Turbulent mixing and layer formation in double-diffusive convection: 3D numerical simulations and theory
Erica Rosenblum, Pascale Garaud, Adrienne Traxler +1
Double-diffusive convection, often referred to as semi-convection in astrophysics, occurs in thermally and compositionally stratified systems which are stable according to the Ledo…
Numerically determined transport laws for fingering ("thermohaline") convection in astrophysics
Adrienne Traxler, Pascale Garaud, Stephan Stellmach
We present the first three-dimensional simulations of fingering convection performed in a parameter regime close to the one relevant for astrophysics, and reveal the existence of s…
Dynamics of fingering convection I: Small-scale fluxes and large-scale instabilities
A. Traxler, S. Stellmach, P. Garaud +2
Double-diffusive instabilities are often invoked to explain enhanced transport in stably-stratified fluids. The most-studied natural manifestation of this process, fingering convec…
A model of the entropy flux and Reynolds stress in turbulent convection
Pascale Garaud, Gordon I. Ogilvie, Neil Miller +1
We propose a closure model for the transport of entropy and momentum in astrophysical turbulence, intended for application to rotating stellar convective regions. Our closure model…