Pressure–strain terms in Langmuir turbulence
Pressure–strain terms in Langmuir turbulence
复制标题
朗缪尔湍流中的压力-应变项
DOI：
10.1017/jfm.2019.701
复制
发表时间：
2019
影响因子：
3.7
通讯作者：
J. Polton
中科院分区：
文献类型：
--
作者：
Brodie C. Pearson;A. Grant;J. Polton
本文研究了Langmuir湍流中的压力-应变张量（$\unicode[STIX]{x1D72B}$）。压力-应变张量由大涡模拟（LES）确定，并被划分为与平均电流剪切（快速）、斯托克斯剪切和湍流-湍流（缓慢）相互作用相关的分量。快速分量可以用现有的闭包模型参数化，尽管闭包模型中的系数是Langmuir湍流特有的。提出了Stokes组件的闭包模型，该模型与LES的结果一致。$\unicode[STIX]{x1D72B}$的慢分量与现有的雷诺兹应力张量的六个分量中的五个分量的“返回各向同性”闭包模型不一致，并提出了一个新的闭包模型，该闭包模型考虑了这些随Langmuir数、$La_{t}$和深度系统变化的偏差。讨论了这些结果对朗缪尔湍流二阶闭包和一阶闭包的影响。
This study investigates the pressure–strain tensor ( $\unicode[STIX]{x1D72B}$ ) in Langmuir turbulence. The pressure–strain tensor is determined from large-eddy simulations (LES), and is partitioned into components associated with the mean current shear (rapid), the Stokes shear and the turbulent–turbulent (slow) interactions. The rapid component can be parameterized using existing closure models, although the coefficients in the closure models are particular to Langmuir turbulence. A closure model for the Stokes component is proposed, and it is shown to agree with results from the LES. The slow component of $\unicode[STIX]{x1D72B}$ does not agree with existing ‘return-to-isotropy’ closure models for five of the six components of the Reynolds stress tensor, and a new closure model is proposed that accounts for these deviations which vary systematically with Langmuir number, $La_{t}$ , and depth. The implications of these results for second- and first-order closures of Langmuir turbulence are discussed.
影响因子：
3.5
作者：
Grant, Alan L. M.;Belcher, Stephen E.
通讯作者：
Belcher, Stephen E.
斯托克斯漂移衰变尺度对朗缪尔湍流的影响
影响因子：
3.5
作者：
Kukulka, Tobias;Harcourt, Ramsey R.
通讯作者：
Harcourt, Ramsey R.
影响因子：
5.2
作者：
Belcher, Stephen E.;Grant, Alan L. M.;Polton, Jeff A.
通讯作者：
Polton, Jeff A.