URANS simulation of flow over smooth topography
URANS simulation of flow over smooth topography
复制标题
光滑地形上流动的 URANS 模拟
DOI：
10.1108/09615530110409394
复制
发表时间：
2001
影响因子：
4.2
通讯作者：
K. Miyashita
中科院分区：
文献类型：
--
作者：
A. Nakayama;K. Miyashita
采用非定常雷诺平均Navier Stokes（URANS）方程方法计算了二维光滑地形上的流动，并与传统的RANS和大涡模拟（LES）结果进行了比较。在固体表面附近具有足够网格分辨率的URANS计算和适当的近壁模型已被证明可以模拟大部分大尺度不稳定性和有分离和无分离流动的一些湍流运动。虽然未调整模型常数的结果与标准的两方程模型相比没有显着改善，但它表明它可以改进，更重要的是，可以通过细化模型，考虑网格相关长度尺度等因素并进行三维计算来推广到新的模拟技术。
An Unsteady Reynolds‐Averaged Navier‐Stokes (URANS) equation method has been applied to compute the flow over two‐dimensional smooth topography and compared with conventional RANS and large‐eddy simulation (LES) results. The URANS calculation with sufficient grid resolution near solid surface and an appropriate near‐wall model has been shown to simulate much of the large‐scale unsteadiness and some of the turbulent motion for flows with and without separation. Although the results with unadjusted model constants do not show an overwhelming improvement over a standard two‐equation model, it is demonstrated that it may be improved and, more importantly, can be generalized to a new simulation technique by refining the model, considering such factors as grid‐dependent length scales and by making a three‐dimensional calculation.