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Schur complement IMplicit-EXplicit formulations for discontinuous Galerkin non-hydrostatic atmospheric models

https://doi.org/10.1016/j.jcp.2023.112361

Reddy, Sohail; Waruszewski, Maciej; de Braganca Alves, Felipe A.V.; Giraldo, Francis X. (October 2023, Journal of Computational Physics)

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Entropy stable discontinuous Galerkin methods for balance laws in non-conservative form: Applications to the Euler equations with gravity

https://doi.org/10.1016/j.jcp.2022.111507

Waruszewski, Maciej; Kozdon, Jeremy E; Wilcox, Lucas C; Gibson, Thomas H; Giraldo, Francis X (November 2022, Journal of Computational Physics)

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Large-eddy simulations with ClimateMachine v0.2.0: a new open-source code for atmospheric simulations on GPUs and CPUs

https://doi.org/10.5194/gmd-15-6259-2022

Sridhar, Akshay; Tissaoui, Yassine; Marras, Simone; Shen, Zhaoyi; Kawczynski, Charles; Byrne, Simon; Pamnany, Kiran; Waruszewski, Maciej; Gibson, Thomas H.; Kozdon, Jeremy E.; et al (January 2022, Geoscientific Model Development)

Abstract. We introduce ClimateMachine, a new open-source atmosphere modeling framework which uses the Julia language and is designed to be scalable on central processing units (CPUs) and graphics processing units (GPUs). ClimateMachine uses a common framework both for coarser-resolution global simulations and for high-resolution, limited-area large-eddy simulations (LESs). Here, we demonstrate the LES configuration of the atmosphere model in canonical benchmark cases and atmospheric flows using a total energy-conserving nodal discontinuous Galerkin (DG) discretization of the governing equations. Resolution dependence, conservation characteristics, and scaling metrics are examined in comparison with existing LES codes. They demonstrate the utility of ClimateMachine as a modeling tool for limited-area LES flow configurations.
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