Zobrazeno 1 - 10
of 389
pro vyhledávání: '"Lecoanet P"'
The susceptibility of timestepping algorithms to numerical instabilities is an important consideration when simulating partial differential equations (PDEs). Here we identify and analyze a pernicious numerical instability arising in pseudospectral si
Externí odkaz:
http://arxiv.org/abs/2411.07286
Autor:
Vasil, Geoffrey M., Burns, Keaton J., Lecoanet, Daniel, Oishi, Jeffrey S., Brown, Benjamin P., Julien, Keith
In the rapidly rotating limit, we derive a balanced set of reduced equations governing the strongly nonlinear development of the convective wall-mode instability in the interior of a general container. The model illustrates that wall-mode convection
Externí odkaz:
http://arxiv.org/abs/2409.20541
Autor:
Vasil, Geoffrey M, Lecoanet, Daniel, Augustson, Kyle, Burns, Keaton J, Oishi, Jeffrey S, Brown, Benjamin P, Brummell, Nicholas, Julien, Keith
The Sun's magnetic dynamo cycle features a distinct pattern: a propagating region of sunspot emergence appears around 30 degrees latitude and vanishes near the equator every 11 years. Moreover, longitudinal flows called "torsional oscillations" close
Externí odkaz:
http://arxiv.org/abs/2404.07740
Recent work suggests that inwardly propagating internal gravity waves (IGWs) within a star can be fully converted to outward magnetic waves (MWs) if they encounter a sufficiently strong magnetic field. The resulting magnetic waves dissipate as they p
Externí odkaz:
http://arxiv.org/abs/2404.07085
Autor:
O'Connor, Liam, Lecoanet, Daniel, Anders, Evan H., Augustson, Kyle C., Burns, Keaton J., Vasil, Geoffrey M., Oishi, Jeffrey S., Brown, Benjamin P.
Even when the partial differential equation underlying a physical process can be evolved forward in time, the retrospective (backward in time) inverse problem often has its own challenges and applications. Direct Adjoint Looping (DAL) is the defacto
Externí odkaz:
http://arxiv.org/abs/2403.00937
The cores of main sequence intermediate- and high-mass stars are convective. Mixing at the radiative-convective boundary, waves excited by the convection, and magnetic fields generated by convective dynamos all influence the main sequence and post-ma
Externí odkaz:
http://arxiv.org/abs/2307.15730
Autor:
Frishman, Anna, Lecoanet, Daniel
As a fluid object breaks, it often leaves behind satellite fragments. Here we show that satellite formation can follow universal dynamics, leading to robust satellite sizes. Specifically, we consider the breakup of a slowly stretched fluid bridge, wh
Externí odkaz:
http://arxiv.org/abs/2306.14242
Autor:
Anders, Evan H., Lecoanet, Daniel, Cantiello, Matteo, Burns, Keaton J., Hyatt, Benjamin A., Kaufman, Emma, Townsend, Richard H. D., Brown, Benjamin P., Vasil, Geoffrey M., Oishi, Jeffrey S., Jermyn, Adam S.
Publikováno v:
Nature Astronomy, 2023, 10.1038/s41550-023-02040-7
Massive stars die in catastrophic explosions, which seed the interstellar medium with heavy elements and produce neutron stars and black holes. Predictions of the explosion's character and the remnant mass depend on models of the star's evolutionary
Externí odkaz:
http://arxiv.org/abs/2306.08023
Autor:
Featherstone, Nicholas A., Augustson, Kyle C., Aurnou, Jonathan M., Blume, Catherine, Brown, Benjamin P., Brummell, Nicholas, Burns, Keaton J., Calkins, Michael A., Camisassa, Maria, Dikpati, Mausumi, Fan, Yuhong, Fuentes, J. R., Guerrero, Gustavo, Hindman, Bradley W., Julien, Keith, Kitiashvili, Irina N., Korre, Lydia, Lecoanet, Daniel, Manek, Bhishek, Matilsky, Loren, Miesch, Mark, Nelson, Nicholas J., Oishi, Jeffrey S., Powers, Whitney T., Rempel, Matthias, Soderlund, Krista, Stejko, Andrey M., Vasil, Geoffrey M.
The operation of the solar dynamo, with all of its remarkable spatio-temporal ordering, remains an outstanding problem of modern solar physics. A number of mechanisms that might plausibly contribute to its operation have been proposed, but the relati
Externí odkaz:
http://arxiv.org/abs/2305.08823
Autor:
Alice Pitout, Pierre Lecoanet, Charles Mazeaud, Victor Gaillard, Baptiste Poussot, Thibault Tricard, Christian Saussine, Thibaut Brierre, Xavier Game, Florian Beraud, Xavier Biardeau, Franck Bruyere, Damien Robin, Mehdi El-Akri, Daniel Chevallier, Tiffany Cousin, Grégoire Capon, Jean-Nicolas Cornu, Hugo Dupuis, Hervé Monsaint, Nicolas Hermieu, Jean-François Hermieu, Priscilla Léon, Benoit Peyronnet, Imad Bentellis
Publikováno v:
International Neurourology Journal, Vol 28, Iss 2, Pp 147-155 (2024)
Purpose This study was performed to assess the risk factors for artificial urinary sphincter (AUS) explantation in a large multicenter cohort. Methods We retrospectively reviewed the medical records for all 1,233 implantations of the AMS-800 AUS devi
Externí odkaz:
https://doaj.org/article/c52b86d4e02c4f659307749b7d9ce715
