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首页> 外文期刊>International Journal of Computational Fluid Dynamics >Resolving unsteady micro-scale atmospheric flows by nesting a CFD simulation into wide range numerical weather prediction models
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Resolving unsteady micro-scale atmospheric flows by nesting a CFD simulation into wide range numerical weather prediction models

机译：通过将CFD模拟嵌套到广泛的数值天气预报模型中来解决不稳定的微尺度大气流

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摘要

The open boundary conditions for the CFD simulation of the micro- and meso-scale flow and temperature distribution around the Grimming mountain, Austria, are determined by an optimisation approach from interior observations. The numerical weather prediction model ALADIN-Austria provides wind speed and wind direction at those spatially arbitrarily defined observations. Furthermore, the plausibility of the resulting flow over the Grimming mountain is checked (a) by data of a ground station at the top of the Grimming mountain showing suitable correlation with the measurements. Besides, (b) the vertical turbulence profiles at the ground station are qualitatively compared to extensive studies covering the Askervein hill. In addition, (c) the wavelength of internal gravity waves obtained from the numerical CFD model is examined by analytic approximations at the Grimming mountain and by linear mountain wave theory at a mathematically idealised hill. Finally, the grid independence of the presented CFD model is shown.View full textDownload full textKeywordsopen boundary conditions, optimisation approach, unsteady mirco-scale atmospheric flow, CFD, RNG k-ϵ, turbulence model, ALADIN-Austria, Numerical weather prediction (NWP)Related var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/10618562.2010.483227
机译：通过内部观测的优化方法，确定了奥地利格里姆明山周围微尺度和中尺度尺度流量和温度分布的CFD模拟的开放边界条件。数值天气预报模型ALADIN-奥地利提供了在空间上任意定义的观测值处的风速和风向。此外，通过在格里明明山顶部的地面站数据显示了与测量值的适当相关性，来检查（a）格里明明山上形成的流动的合理性。此外，（b）将地面站的垂直湍流剖面与覆盖Askervein山的大量研究进行了定性比较。另外，（c）通过在Grimming山的解析近似和在数学上理想的山的线性山波理论，检查了从CFD数值模型获得的内部重力波的波长。最后，显示了所提出的CFD模型的网格独立性。查看全文下载全文关键字开放边界条件，优化方法，非稳态微尺度大气流，CFD，RNG k-μµ，湍流模型，ALADIN-奥地利，数值天气预报（NWP） ）相关的var addthis_config = {ui_cobrand：“泰勒和弗朗西斯在线”，servicescompact：“ citeulike，netvibes，twitter，technorati，delicious，linkedin，facebook，stumbleupon，digg，google，更多”，发布号：“ ra-4dff56cd6bb1830b”};添加到候选列表链接永久链接http://dx.doi.org/10.1080/10618562.2010.483227

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