Numerical Validation of a New Methodology for the Generation of Realistic Turbulent Inflow Conditions for LES
Numerical Validation of a New Methodology for the Generation of Realistic Turbulent Inflow Conditions for LES
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生成 LES 真实湍流流入条件的新方法的数值验证
DOI：
10.1115/ht-fed2004-56165
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
J. Bonnet
中科院分区：
文献类型：
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作者：
P. Druault;J. Largeau;F. Coiffet;S. Lardeau;J. Bonnet
由于数值模拟难以确定真实的入流条件，最近开发了一种新方法，允许使用随时间变化的高度湍流速度场作为空间发展的大涡模拟的入流条件。这种方法是基于实验的时间历程，在几个选定的参考位置与热线探头。根据这些测量结果，在数值模拟的入口网格上重建瞬时速度场，并将此重建场用作模拟的流入条件。这项工作的目的是通过使用纯数值方法，直接数值模拟的基础上，其中实验数据被替换为数值数据，以验证本方法。基于统计分析和瞬时涡量场可视化，目前的数值验证为这种基于真实的实验数据的新入流条件生成方法提供了有希望的结果。
Due to the difficulty of specifying realistic inflow conditions for numerical simulations, a new method has been recently developed permitting to use time-dependent highly turbulent velocity field as inflow condition for spatially developing Large Eddy Simulation. This methodology is based on experimental time histories obtained at few selected reference locations with hot wires probes. From these measurements, the instantaneous velocity field is reconstructed on the inlet mesh of a numerical simulation and this reconstructed field is used as inflow condition for the simulation. The objective of this work is to validate the present methodology by using a purely numerical approach, based on Direct Numerical Simulation, in which experimental data are replaced by numerical data. Based on statistical analysis and instantaneous vorticity field visualizations, current numerical validation provides promising results for this new inflow condition generation method based on real experimental data.Copyright © 2004 by ASME