Experimental investigation of slope flows via image analysis techniques

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• 作者：Monica Moroni ; Marco Giorgilli ; Antonio Cenedese
• 关键词：Local currents ; Laboratory experiments ; Image analysis techniques ; Katabatic currents ; Anabatic currents ; Urban Heat Island
• 刊名：Journal of Atmospheric and Solar-Terrestrial Physics
• 出版年：February, 2014
• 年：2014
• 卷：108
• 期：Complete
• 页码：17-33
• 全文大小：13916 K

文摘

A vessel filled with distilled water is used to simulate the local circulation in the surroundings of an urban area that is situated in a mountain valley. The purpose of this study is to establish if the experimental setup is suitable for the investigation of katabatic and anabatic flows and their interaction with an urban heat island. Flow fields are derived by means of Feature Tracking and temperature fields are directly measured with thermocouples. The technique employed allows obtaining a high spatio-temporal resolution, providing robust statistics for the characterization of the fluid-dynamic field. General qualitative comparisons are made with expectations from analytical models. It appeared that the experimental setup as used in this study can be used for reproducing the phenomena occurring in the atmospheric boundary layer.