Continuous and Discontinuous Galerkin Methods for a Scalable 3D Nonhydrostatic Atmospheric Model: limited-area mode

摘要: This paper describes a unified, element based Galerkin (EBG) framework for three-dimensional, nonhydrostatic model the atmosphere. In general, EBG methods possess highorder accuracy, geometric flexibility, excellent dispersion properties and good scalability. Our model, on compressible Euler equations, is appropriate both limited-area global atmospheric simulations. Both continuous (CG), or spectral element, discontinuous (DG) are considered using hexahedral elements. The formulation suitable modeling, although we restrict our attention to 3D phenomena in this study; simulations will be presented follow-up paper. Domain decomposition communication algorithms used by CG DG models presented. volume exchange compared contrasted. Numerical verification of was performed two test cases: flow past mountain buoyant convection bubble neutral atmosphere; these tests indicate that can simulate necessary physics dry dynamics. Scalability shown up 8192 CPU cores, with near ideal scaling 32,768 cores. 2012 Elsevier Inc. All rights reserved.