Stabilized bases for high-order, interpolation semi-Lagrangian, element-based tracer transport
Journal Article
·
· Journal of Computational Physics
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
In a computational fluid model of the atmosphere, the advective transport of trace species, or tracers, can be computationally expensive. For efficiency, models often use semi-Lagrangian advection methods. High-order interpolation semi-Lagrangian (ISL) methods, in particular, can be extremely efficient, if the problem of property preservation specific to them can be addressed. Atmosphere models often use geometrically and logically nonuniform grids for efficiency and, as a result, element-based discretizations. Such grids and discretizations make stability a particular problem for ISL methods. Generally, high-order, element-based ISL methods that use the natural polynomial interpolant associated with a nodal finite-element discretization are unstable. Here, we derive new bases having order of accuracy up to nine, with positive nodal weights, that stabilize the element-based ISL method. We use these bases to construct the linear advection operator in the property-preserving Interpolation Semi-Lagrangian Element-based Transport (Islet) method. Then we discuss key software implementation details. Finally, we show performance results for the Energy Exascale Earth System Model's atmosphere dynamical core, comparing the original and new transport methods. These simulations used up to 27,600 Graphical Processing Units (GPU) on the Oak Ridge Leadership Computing Facility's Summit supercomputer.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC); USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- AC05-00OR22725; NA0003525
- OSTI ID:
- 2345299
- Alternate ID(s):
- OSTI ID: 2340183
- Report Number(s):
- SAND--2024-05345J
- Journal Information:
- Journal of Computational Physics, Journal Name: Journal of Computational Physics Vol. 508; ISSN 0021-9991
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Islet: interpolation semi-Lagrangian element-based transport
A semi-Lagrangian model incorporating a spectral method for pollutant transport and diffusion
Journal Article
·
Mon Aug 15 20:00:00 EDT 2022
· Geoscientific Model Development (Online)
·
OSTI ID:1881521
A semi-Lagrangian model incorporating a spectral method for pollutant transport and diffusion
Conference
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:28744