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A field case study and numerical simulation of mountain flows with weak ambient winds

机译：弱环境风山地流动的现场案例研究与数值模拟

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摘要

Wind data collected by two ground stations in a mountainous area are used to inteestigate the mean properties of the flow on two typical summer days when the wind at the ridgetop had a perpendicular component to the ridge. The study area is located in the Central Range in the center of the Iberian Peninsula, Spain. The overall objective of the study is to develop a wind model. Its main application will be to supply surface wind fields to a forest fire simulator, although it could be used for the whole emergency response community. This model has been developed with the premise that in mountainous terrain the wind on a given point can be considered ms the result of vector addition of a large-scale flow modified by the local topography and the different components of the wind generated by the subgrid-scale inhomogeneities of the ground surface. Functions that include the topographic effects of sheltering and deflecting and the generation of slope flows have been formulated. The model is considered a physical-mathematical model coupled to the output of a mesoscale prediction model. The model outputs are presented and compared with the experimental data. This discussion is restricted to the weak ambient wind conditions in which the thermal stratifications in the planetary boundary layer are significant and thermally induced circulations are meaningful.
机译：由山区两个地面站收集的风数据用于确定两个典型夏季（当山脊处的风与山脊垂直分量时）的平均流量特性。研究区域位于西班牙伊比利亚半岛中心的中央山脉。该研究的总体目标是开发一个风模型。它的主要应用是向森林火灾模拟器提供地表风场，尽管它可以用于整个应急响应社区。开发该模型的前提是，在山区，可以将给定点上的风视为由局部地形修改后的大流量的矢量相加结果以及子电网产生的风的不同分量的结果。缩放地面的不均匀性。已经制定了包括遮挡和偏转的地形效应以及边坡流产生的功能。该模型被认为是与中尺度预测模型的输出耦合的物理数学模型。给出了模型输出，并与实验数据进行了比较。讨论仅限于弱环境风条件，在这种条件下，行星边界层中的热分层非常明显，而热诱导的循环是有意义的。

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