Moving overlapping grid methodology of spectral accuracy for incompressible flow solutions around rigid bodies in motion
Moving overlapping grid methodology of spectral accuracy for incompressible flow solutions around rigid bodies in motion
复制标题
运动中刚体周围不可压缩流动解决方案的光谱精度的移动重叠网格方法
DOI：
10.1016/j.jcp.2019.01.048
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Y. Peet
中科院分区：
文献类型：
--
作者：
B. E. Merrill;Y. Peet
对于传统的计算流体动力学求解器来说，运动刚体周围流体流动的模拟已经被证明是一项困难的任务。将全局域分解为重叠的子域，并允许每个子域独立移动，允许以简单的方式确定具有复杂移动几何形状的许多流动问题的解决方案。移动重叠网格法的当前发展是建立在谱元法不可压缩流求解器内，并使用控制方程的任意拉格朗日-欧拉公式来规定子域运动。该方法通过多项式细化保持了整个子区域的全局谱空间精度。该方法的全球高阶时间精度也保持通过子域耦合执行的显式接口时间外推计划。该方法产生的空气动力和旋涡脱落周围的二维和三维移动的刚体，这是符合已发表的实验和计算数据。此外，该方法实现了接近线性的计算扩展到数千个核心。
The simulation of fluid flow around moving rigid bodies has proven to be a difficult task for traditional computational fluid dynamics solvers. Decomposing the global domain into overlapping subdomains and allowing each subdomain to move independently, permits solutions to many flow problems with complex moving geometries to be determined in a straightforward manner. The present development of the moving overlapping grid method is built within a spectral element method incompressible flow solver, and uses an Arbitrary Lagrangian-Eulerian formulation of the governing equations to prescribe subdomain motions. The method maintains global spectral spatial accuracy across the subdomains with the polynomial refinement. The global high-order temporal accuracy of the method is also maintained through subdomain coupling enforced by an explicit interface temporal extrapolation scheme. The method produces aerodynamic forces and vortex shedding around two- and three-dimensional moving rigid bodies that is in line with published experimental and computational data. Additionally, the method achieves near linear computational scaling to thousands of cores.