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Large-eddy simulation of high-Re number wall-bounded flow applying explicit filtering

机译:高重壁限流施加显式滤波的大涡模拟

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Correct representation of the effects of the turbulence structure near solid boundaries is very important for successful large-eddy simulation(LES). In the present work, this wall modeling is done based on explicitly filtered equations of motion which have so-called commutation error terms near solid boundaries. These terms are ignored in conventional LES, but in the present work, these boundary terms are modeled using a dynamic procedure, making use of the scalesimilarity of the modeled terms. It is found, by applying the procedure in LES of a channel flow, that the modeling of the boundary terms makes it possible to simulate high-Reynolds number wall-bounded flow. The method can be easily extended to LES of flows over rough and complex surface and can be very useful in various applications.
机译:正确表示湍流结构近的固体边界的效果对于成功的大涡模拟(LES)非常重要。在本作工作中,这种墙面建模是基于明确过滤的运动方程来完成的,该方程具有靠近实心边界的所谓的换向误差术语。这些术语在传统的LES中被忽略,但在本作工作中,使用动态程序建模这些边界术语,利用所建模术语的缩放脂序。通过在信道流中应用程序中的程序来找到,边界术语的建模使得可以模拟高雷诺数壁限流。该方法可以很容易地扩展到粗糙和复杂的表面上的流量,并且在各种应用中非常有用。

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