Research Summaries

Back Scalable Nonhydrostatic Unified Models of the Atmosphere with Moisture

Fiscal Year 2013
Division Graduate School of Engineering & Applied Science
Department Applied Mathematics
Investigator(s) Giraldo, Francis X.
Sponsor Office of Naval Research (Navy)
Summary The goal of this project is to develop state-of-the-art multi-scale nonhydrostatic atmospheric models that can be used in microscale, mesoscale, and global applications and scale efficiently on distributed-memory computers including graphics processing units (GPUs). The PI has made great strides in this area but the models require additional work nonetheless. The most pressing additions to the models include: 1) adding moisture to both the two-dimensional DG and the three-dimensional CG and DG models. 2) Although the limited-area versions of both the CG and DG models have been rigorously benchmarked, we still need to perform the same kind of testing to the global versions of the model. 3) To properly validate the model requires adding turbulence closures; this will be carried out in close cooperation with the Naval Research Laboratory. 4) We have begun to explore adaptive mesh refinement (AMR) but currently only in the context of the two-dimensional DG form. We propose to extend this AMR strategy for the two-dimensional CG form as well as the three-dimensional CG and DG forms. This is a major undertaking but we feel that it will give NUMA a very powerful additional capability that will further distance it from other next-generation models. 5) We have conducted scalability studies of 3D-NUMA for explicit time integrators; we now plan on adding various components to speed up the performance of the IMEX (semi-implicit) versions of NUMA and will perform large scalability studies. 6) Our goal is to focus our efforts towards performing a massively scalable hurricane simulation in three-dimensions with adaptive mesh refinement. All of the areas that we wish to study in the next few years will lead us to our end goal.
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Data Publications, theses (not shown) and data repositories will be added to the portal record when information is available in FAIRS and brought back to the portal