The decay of grid turbulence in polymer and surfactant solutions
The decay of grid turbulence in polymer and surfactant solutions
复制标题
DOI：
10.1063/1.870100
复制
发表时间：
1999-07
影响因子：
4.6
通讯作者：
E. V. Doorn;C. White;K. Sreenivasan
中科院分区：
文献类型：
--
作者：
E. V. Doorn;C. White;K. Sreenivasan
采用粒子图像测速技术研究了聚合物和表面活性剂溶液中拖曳网格后湍流的衰减。与在水中不同，湍流能量分量显示出明显的各向异性，衰减更慢。这些差异在最初的一段时间内更强，但在整个衰变期间持续存在。聚合物和表面活性剂溶液的主要区别在于前者对小尺度的阻尼更强。本文用粒子图像测速技术研究了聚合物和表面活性剂溶液中拖曳网格后湍流的衰减。与在水中不同，湍流能量分量显示出明显的各向异性，衰减更慢。这些差异在最初的一段时间内更强，但在整个衰变期间持续存在。聚合物溶液和表面活性剂溶液之间的主要区别在于，前者的小尺度阻尼更强。
The decay of turbulence behind a towed grid is studied in polymer and surfactant solutions with the use of particle image velocimetry. Unlike in water, the turbulent energy components show marked anisotropy, and decay more slowly. These differences are stronger for initial periods of time, but persist through the entire period of decay. The major difference between the polymer and surfactant solutions is that the small scales are more strongly damped in the former.The decay of turbulence behind a towed grid is studied in polymer and surfactant solutions with the use of particle image velocimetry. Unlike in water, the turbulent energy components show marked anisotropy, and decay more slowly. These differences are stronger for initial periods of time, but persist through the entire period of decay. The major difference between the polymer and surfactant solutions is that the small scales are more strongly damped in the former.