Effect of Grid Geometry on Turbulence Decay
Effect of Grid Geometry on Turbulence Decay
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网格几何形状对湍流衰减的影响
DOI：
10.1063/1.1762265
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发表时间：
1967
影响因子：
4.6
通讯作者：
S. Wallis
中科院分区：
文献类型：
--
作者：
M. S. Uberoi;S. Wallis
纵向和横向湍流强度u2 <$和v2 <$在各种几何形状的均匀网格后测量。对于所有使用的网格，比率u2在衰减期间基本上是恒定的，并且取决于网格几何形状而位于1.2和1.35之间。湍流强度u2 <$t−n，其中n在衰减过程中是常数，但取决于网格几何形状，在1.22到1.48之间变化。这意味着衰变速率取决于初始能谱，并且包含能量的（大）涡旋在衰变期间保持相似性。
Longitudinal and lateral turbulence intensities u2¯ and v2¯ are measured behind homogeneous grids of various geometries. For all grids used, the ratio u2¯/v2¯ is essentially constant during decay and lies between 1.2 and 1.35, depending on the grid geometry. The turbulence intensity u2¯∼t−n where n is constant during decay but depends on the grid geometry and varies from 1.22 to 1.48. This implies that the rate of decay depends on the initial energy spectrum and the energy‐containing (large) eddies maintain a similarity during decay.