A zonal grid algorithm for DNS of turbulent boundary layers
A zonal grid algorithm for DNS of turbulent boundary layers
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DOI：
10.1016/s0045-7930(03)00061-6
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发表时间：
2004-03
影响因子：
2.8
通讯作者：
M. Manhart
中科院分区：
文献类型：
--
作者：
M. Manhart
本文提出了一种在有限体积法框架下对不可压湍流进行直接数值模拟的分区网格算法。该算法使用完全耦合的嵌入式网格和网格界面变量的保守处理。在二维涡偶极子和三维湍流边界层流动中对一族保守延拓算子进行了试验。这些测试表明，第一和第二阶插值保存的整体二阶空间精度的计划。一阶守恒插值对解的阻尼影响较小，而二阶守恒插值具有较好的谱性质。将该算法应用于边界层流动分离和重附问题，表明了该算法的有效性和实用性。通过分区网格算法，将所需的网格点数从约500× 106减少到130× 106网格单元，使得这种模拟成为可能。
A zonal grid algorithm for direct numerical simulation (DNS) of incompressible turbulent flows within a Finite-Volume framework is presented. The algorithm uses fully coupled embedded grids and a conservative treatment of the grid-interface variables. A family of conservative prolongation operators is tested in a 2D vortex dipole and a 3D turbulent boundary layer flow. These tests show that both, first- and second-order interpolation conserves the overall second-order spatial accuracy of the scheme. The first-order conservative interpolation has a smaller damping effect on the solution but the second-order conservative interpolation has better spectral properties. The application of this algorithm in boundary layer flow separating and reattaching due to the presence of a streamwise pressure gradient reveals the power and usefulness of the presented algorithm. This simulation has been made possible by the zonal grid algorithm by reducing the required number of grid points from about 500×106to 130×106grid cells.