OMEGA: The operational multiscale environment model with grid adaptivity
This review talk describes the OMEGA code, used for weather simulation and the modeling of aerosol transport through the atmosphere. Omega employs a 3D mesh of wedge shaped elements (triangles when viewed from above) that adapt with time. Because wedges are laid out in layers of triangular elements, the scheme can utilize structured storage and differencing techniques along the elevation coordinate, and is thus a hybrid of structured and unstructured methods. The utility of adaptive gridding in this moded, near geographic features such as coastlines, where material properties change discontinuously, is illustrated. Temporal adaptivity was used additionally to track moving internal fronts, such as clouds of aerosol contaminants. The author also discusses limitations specific to this problem, including manipulation of huge data bases and fixed turn-around times. In practice, the latter requires a carefully tuned optimization between accuracy and computation speed.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- OSTI ID:
- 232578
- Report Number(s):
- CONF-941279-; ON: DE96002417; CNN: Contract DNA001-92-C-0076; TRN: 96:002002-0001
- Resource Relation:
- Conference: Workshop on adaptive grid methods, Pleasanton, CA (United States), 8-9 Dec 1994; Other Information: PBD: Jul 1995; Related Information: Is Part Of Proceedings of the workshop on adaptive grid methods for fusion plasmas; Koniges, A.E.; Craddock, G.G.; Schnack, D.D.; Strauss, H.R.; PB: 500 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Unstructured adaptive grid flow simulations of inert and reactive gas mixtures
Connectivity structures and differencing techniques for staggered-grid free-Lagrange hydrodynamics