Direct Numerical Simulation and Implicit Large Eddy Simulation of Stratified Turbulence
Direct Numerical Simulation and Implicit Large Eddy Simulation of Stratified Turbulence
复制标题
层状湍流的直接数值模拟和隐式大涡模拟
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
S. Hickel
中科院分区：
文献类型：
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作者：
S. Remmler;S. Hickel
地球物理湍流的模拟需要一个强大的和准确的亚网格尺度湍流模型。基于自适应局部反褶积方法，提出了一个分层流体的隐式亚网格模型。为了验证该湍流模型，我们进行了直接数值模拟的过渡的三维泰勒-格林涡和均匀分层湍流。我们的分析证明，隐式湍流模型正确地预测了湍流能量收支和分层湍流的谱结构。
Simulation of geophysical turbulent flows requires a robust and accurate subgrid-scale turbulence modeling. We propose an implicit subgrid-scale model for stratified fluids, based on the Adaptive Local Deconvolution Method. To validate this turbulence model, we performed direct numerical simulations of the transition of the three-dimensional Taylor–Green vortex and homogeneous stratified turbulence. Our analysis proves that the implicit turbulence model correctly predicts the turbulence energy budget and the spectral structure of stratified turbulence.