Parallel Anisotropic Tetrahedral Adaptation
Parallel Anisotropic Tetrahedral Adaptation
复制标题
DOI：
10.2514/6.2008-917
复制
发表时间：
2008-01
期刊：
影响因子：
--
通讯作者：
M. Park;D. Darmofal
中科院分区：
文献类型：
--
作者：
M. Park;D. Darmofal
提出了一种自适应的方法，该方法鲁棒地产生高纵横比四面体到一般的3D度量规格，而不引入混合半结构化区域。网格操作符和更高级别的逻辑描述与各自的域分解并行化。在一个简单的立方体几何中，一个四面体自适应方案被证明适用于1000 - 1的各向异性。这种形式的适应是适用于更复杂的域边界，通过切割单元的方法所证明的一个复杂的战斗机的并行三维超音速仿真。为了避免所需的假设和近似，形成一个度量，以指定适应，一种方法，直接评估插值误差。网格适于减少和均匀分布该插值误差计算，而不使用介入的各向异性度量。直接插值误差自适应说明了五阶元素在1D和线性和二次四面体在3D。
An adaptive method that robustly produces high aspect ratio tetrahedra to a general 3D metric specification without introducing hybrid semi-structured regions is presented. The grid operators and higher-level logic is described with their respective domain-decomposed parallelizations. An tetrahedral adaptation scheme is demonstrated for 1000‐1 anisotropy in a simple cube geometry. This form of adaptation is applicable to more complex domain boundaries via a cut-cell approach as demonstrated by a parallel 3D supersonic simulation of a complex fighter aircraft. To avoid the assumptions and approximations required to form a metric to specify adaptation, an approach is introduced that directly evaluates interpolation error. The grid is adapted to reduce and equidistribute this interpolation error calculation without the use of an intervening anisotropic metric. Direct interpolation error adaptation is illustrated for fifth-order elements in 1D and linear and quadratic tetrahedra in 3D.