A dynamic subgrid‐scale model for compressible turbulence and scalar transport
A dynamic subgrid‐scale model for compressible turbulence and scalar transport
复制标题
DOI：
10.1063/1.858164
复制
发表时间：
1991-11
影响因子：
4.6
通讯作者：
P. Moin;K. Squires;W. Cabot;Sangsan Lee
中科院分区：
文献类型：
--
作者：
P. Moin;K. Squires;W. Cabot;Sangsan Lee
Germano等人[《物理流体A》3, 1760 (1991)]的动态亚格子尺度（SGS）模型被推广用于可压缩流和标量输运的大涡模拟（LES）。该模型被应用于衰减各向同性湍流的大涡模拟，其结果与实验数据和直接数值模拟非常吻合。使用各向同性湍流、均匀剪切流和湍流槽道流中的直接数值模拟（DNS）数据评估了SGS湍流普朗特数的表达式。该模型中湍流普朗特数的定性行为及其对分子普朗特数、标量梯度方向和距壁面距离的依赖性与来自DNS数据的总湍流普朗特数相符。
The dynamic subgrid‐scale (SGS) model of Germano et al. [Phys. Fluids A 3, 1760 (1991)] is generalized for the large eddy simulation (LES) of compressible flows and transport of a scalar. The model was applied to the LES of decaying isotropic turbulence, and the results are in excellent agreement with experimental data and direct numerical simulations. The expression for the SGS turbulent Prandtl number was evaluated using direct numerical simulation (DNS) data in isotropic turbulence, homogeneous shear flow, and turbulent channel flow. The qualitative behavior of the model for turbulent Prandtl number and its dependence on molecular Prandtl number, direction of scalar gradient, and distance from the wall are in accordance with the total turbulent Prandtl number from the DNS data.