matlab匹配滤波代码-lesTools:用于大涡模拟的亚网格规模模型的构建和评估的工具箱
matlab匹配滤波代码lesTools
用于大涡模拟的亚网格规模模型的构建和评估的工具箱
关于
lesTools是MATLAB脚本的工具箱，可帮助构建和评估用于大涡流湍流模拟的子网格规模模型。
当前，
lesTools包含两个模块：
流量统计模块;
近壁缩放模块。
flowStats
研究基于湍流速度梯度的物理量统计行为的工具
关于
flowStats模块是一个工具，可用于研究基于湍流速度梯度的物理量的统计行为。
这样，该模块可用于估计用于大涡模拟的子网格规模模型的模型常数。
背景
大涡模拟是湍流行为数值预测的有力方法。
在大涡模拟中，显式计算了流动中的大尺度运动，而小尺度运动的影响则使用亚网格尺度模型进行建模（例如，参见Sagaut
[]和Pope
[]的专着）。
但是，一旦确定了一个或多个模型常数的值，大多数子网格规模的模型只能用于实际的大涡模拟中。
可以使用简单的耗散参数来估算涡流粘度模型的模型常数。
人们要求由于涡流粘度模型而产生的平均子网格耗散必须与Smagorinsky模型[，，，]的平均耗散相匹配。
例如，可以使用来自实验或数值模拟的均质各向同性湍流的速度场来计算子网格
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