Two-Dimensional Evaluation of ATHAM-Fluidity, a Nonhydrostatic Atmospheric Model Using Mixed Continuous/Discontinuous Finite Elements and Anisotropic Grid Optimization
Two-Dimensional Evaluation of ATHAM-Fluidity, a Nonhydrostatic Atmospheric Model Using Mixed Continuous/Discontinuous Finite Elements and Anisotropic Grid Optimization
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DOI：
10.1175/mwr-d-15-0398.1
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发表时间：
2016-10
影响因子：
3.2
通讯作者：
J. Savre;J. Percival;M. Herzog;C. Pain
中科院分区：
文献类型：
--
作者：
J. Savre;J. Percival;M. Herzog;C. Pain
摘要本文首次尝试将可压缩非静水力主动示踪剂高分辨率大气模型-流动性（ATHAM-Fluidity）求解器应用于一系列理想化大气测试案例。 ATHAM-Fluidity 使用混合有限元离散化，其中压力在连续二阶网格上求解，而动量和标量在一阶不连续网格（也称为 ）上计算。 ATHAM-Fluidity 在二维和三维非结构化网格上运行，分别使用三角形或四面体元素，可以采用各向异性网格优化算法在运行时自动细化和粗化网格。使用覆盖广泛大气应用的纯二维干燥理想化测试用例来评估求解器。前三个案例代表了大气对流，揭示了 ATHAM-Fluidity 准确模拟中性大气中大尺度流动特征演化的能力。
AbstractThis paper presents the first attempt to apply the compressible nonhydrostatic Active Tracer High-Resolution Atmospheric Model–Fluidity (ATHAM-Fluidity) solver to a series of idealized atmospheric test cases. ATHAM-Fluidity uses a hybrid finite-element discretization where pressure is solved on a continuous second-order grid while momentum and scalars are computed on a first-order discontinuous grid (also known as ). ATHAM-Fluidity operates on two- and three-dimensional unstructured meshes, using triangular or tetrahedral elements, respectively, with the possibility to employ an anisotropic mesh optimization algorithm for automatic grid refinement and coarsening during run time. The solver is evaluated using two-dimensional-only dry idealized test cases covering a wide range of atmospheric applications. The first three cases, representative of atmospheric convection, reveal the ability of ATHAM-Fluidity to accurately simulate the evolution of large-scale flow features in neutral atmospheres at res...