500 citations · 2.2k across the 60 of their papers we have counts for
9 papers · 1 filter
Black Hole Accretion Discs and Luminous Transients in Failed Supernovae from Non-Rotating Supergiants
Eliot Quataert, Daniel Lecoanet, Eric R. Coughlin
We show that for supergiants, net angular momentum is not a necessary condition for forming accretion discs during core-collapse. Even absent net rotation, convective motions in th…
Buoyant Motion of a Turbulent Thermal
Nathaniel Tarshish, Nadir Jeevanjee, Daniel Lecoanet
By introducing an equivalence between magnetostatics and the equations governing buoyant motion, we derive analytical expressions for the acceleration of isolated density anomalies…
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…
Tensor calculus in spherical coordinates using Jacobi polynomials. Part-I: Mathematical analysis and derivations
Geoff Vasil, Daniel Lecoanet, Keaton Burns +2
This paper presents a method for the accurate and efficient computations on scalar, vector and tensor fields in three-dimensional spherical polar coordinates. The methods uses spin…
Tensor calculus in spherical coordinates using Jacobi polynomials, Part-II: Implementation and Examples
Daniel Lecoanet, Geoffrey M. Vasil, Keaton J. Burns +2
We present a simulation code which can solve broad ranges of partial differential equations in a full sphere. The code expands tensorial variables in a spectral series of spin-weig…
Connection between Nonlinear Energy Optimization and Instantons
Daniel Lecoanet, Rich R. Kerswell
How systems transit between different stable states under external perturbation is an important practical issue. We discuss here how a recently-developed energy optimization method…
Entrainment in Resolved, Dry Thermals
Daniel Lecoanet, Nadir Jeevanjee
Entrainment in cumulus convection remains ill-understood and difficult to quantify. For instance, entrainment is widely believed to be a fundamentally turbulent process, even thoug…
Perspectives on Reproducibility and Sustainability of Open-Source Scientific Software from Seven Years of the Dedalus Project
Jeffrey S. Oishi, Benjamin P. Brown, Keaton J. Burns +2
As the Science Mission Directorate contemplates establishing an open code policy, we consider it timely to share our experiences as the developers of the open-source partial differ…