Determination of open boundary conditions for computational fluid dynamics (CFD) from interior observations

Simon Schneiderbauer; Stefan Pirker

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Determination of open boundary conditions for computational fluid dynamics (CFD) from interior observations

机译：从内部观察确定计算流体动力学（CFD）的开放边界条件

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摘要

An optimization approach for the determination of open boundary conditions for Computational Fluid Dynamics is introduced, whereas the error between the solution σ and interior observations ω is minimized. The numerical weather prediction (NWP) model ALADIN-Austria provides data of wind speed and wind direction at virtual weather stations within the area of interest. Also, data from real weather stations and other sources can be incorporated into the model, respectively. In this work, the optimization method is applied to the constant density Navier-Stokes Equations. Thereby, for stabilizing the ill-posed pseudo inverse problem several regularization methods are reviewed. Further, numerical studies are carried out to identify the supreme regularization method for the presented application. Finally, the algorithm is applied to the micro- and meso-scale flow over the Grimming mountain, Austria. The results are compared with real weather station data and show suitable correlation with the measurements.

机译：介绍了一种确定计算流体动力学的开放边界条件的优化方法，而将解决方案σ与内部观测值ω之间的误差最小化。数值天气预报（NWP）模型ALADIN-奥地利提供了感兴趣区域内虚拟气象站的风速和风向数据。而且，来自真实气象站和其他来源的数据可以分别合并到模型中。在这项工作中，将优化方法应用于恒密度Navier-Stokes方程。因此，为了稳定不适定伪逆问题，回顾了几种正则化方法。此外，进行了数值研究，以确定本申请的最高正则化方法。最后，将该算法应用于奥地利格里明明山上的微尺度和中尺度流。将结果与实际气象站数据进行比较，并显示与测量值的适当相关性。

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来源
《Applied Mathematical Modelling》 |2011年第2期|p.763-780|共18页
作者
Simon Schneiderbauer; Stefan Pirker;
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作者单位

Recipient of a DOC-Feltowship of the Austrian Academy of Sciences at the Institute of Fluid Mechanics and Heat Transfer, Johannes Kepler University, Altenbergerstr. 69, Linz, Austria;

rnChristian-Doppler Laboratory on Paniculate Flow Modelling. Johannes Kepler University, Altenbergerstr. 69, Linz, Austria;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种 eng
中图分类
关键词
open boundary conditions; optimization approach; regularization methods; navier-stokes equations;

机译：开放边界条件;优化方法;正则化方法;导航斯托克斯方程;

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Determination of open boundary conditions for computational fluid dynamics (CFD) from interior observations

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