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Atmosphere 2018, 9(5), 165;

Separation of Upslope Flow over a Plateau

Faculty of Civil and Environmental Engineering, Technion—Israel Institute of Technology, Haifa 32000, Israel
Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46530, USA
Department of Applied Physics, Eindhoven University of Technology, Eindhoven, 5612, The Netherlands
US Army Research Laboratory, Battlefield Environment Division, White Sands Missile Range, NM 88002, USA
College of Water Resources & Civil Engineering, China Agricultural University, Beijing 100083, China
Beijing Engineering Research Center of Safety and Energy Saving Technology for Water Supply Network System, Beijing 100083, China
Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, IN 46530, USA
Author to whom correspondence should be addressed.
Received: 5 February 2018 / Revised: 15 April 2018 / Accepted: 27 April 2018 / Published: 30 April 2018
(This article belongs to the Special Issue Atmospheric Processes over Complex Terrain)
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A laboratory study was conducted in order to gain an understanding of thermal convection in a complex terrain that is characterized by a plateaued mountain. In particular, the separation of upslope (anabatic) flow over a two-dimensional uniform smooth slope, topped by a plateau, was considered. The working fluid was homogeneous water (neutral stratification). The topographic model was immersed in a large water tank with no mean flow. The entire topographic model was uniformly heated, and the width of the plateau, the slope angle, and the heating rate were varied. The upslope velocity field was measured by the Particle Tracking Velocimetry, aided by Feature Tracking Visualizations in order to detect the flow separation location. An analysis of the resulting flow showed a quantitative similarity to separating the upslope flow over steeper slopes, in the absence of a plateau when an effective angle that incorporates the normalized plateau width, the slope length, and the geometric slope angle, was used. Predictions for the dependence of the separation location and velocity on the geometry and heat flux were presented and compared with the existing data. View Full-Text
Keywords: atmospheric flows; anabatic flows; complex topography; meteorology; topographic effects atmospheric flows; anabatic flows; complex topography; meteorology; topographic effects

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Hilel Goldshmid, R.; Bardoel, S.L.; Hocut, C.M.; Zhong, Q.; Liberzon, D.; Fernando, H.J.S. Separation of Upslope Flow over a Plateau. Atmosphere 2018, 9, 165.

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