Large eddy simulation (LES) is a mathematical model for turbulence used in computational fluid dynamics. It was initially proposed in 1963 by Joseph Smagorinsky to simulate atmospheric air …

采用这一模型之后，我们发现出现了一个未知量亚格子粘性 \nu_{sgs},在LES中，会采用不同的方法计算 \nu_{sgs} ，现在我们介绍一下在Smagorinsky model里面如何计算。

导读：介绍大涡模拟（les）。les特点在les中，并不是所有的尺度都被建模，但大的湍流尺度被数值方法解决；由于网格分辨率的限制，较小的尺度涡流无法得到解决；les的计算成本比rans …

以下章节详细介绍了LES的控制方程、亚格子尺度湍流模型以及边界条件。 由于过滤操作产生的亚格子尺度（SGS）应力是未知的，需要进行建模。 Ansys Fluent中的亚格子尺度湍流模型采用 …

大涡模拟（Large eddy simulation，LES）是介于直接数值模拟（DNS）和Reynolds平均法之间的一种数值模拟方法。 基本思想湍流包含一系列大大小小的涡团，涡尺度范围很大，我们希望 …

2023年9月11日 · Most sub-grid scale (SGS) models employed in LES (large eddy simulation) formulations were originally developed for incompressible, single phase, inert flows and …

2015年2月1日 · Large-eddy simulation (LES) was originally proposed for simulating atmospheric flows in the 1960s and has become one of the most promising and successful methodology for …

Large eddy simulation (LES) is a popular technique for simulating turbulent flows. An implication of Kolmogorov 's (1941) theory of self similarity is that the large eddies of the flow are …

In energy conserving codes (ideal for LES) the only way for TKE to leave the resolved modes is by the dissipation provided by the SGS model. The primary goal of an SGS model is to obtain …

2014年7月22日 · Objective: The present work investigates how suitable different subgrid stress (SGS) models, i.e. the static and dynamic Smagorinsky and in particular Sigma models are for …