Experimental and numerical study of wind flow behind windbreaks |
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| Institution: | 1. Environment Department, Research Center for Energy, Environment and Technology (CIEMAT), Av. Complutense 22, 28040 Madrid, Spain;2. IDR/UPM, E.T.S.I. Aeronáuticos, Universidad Politécnica de Madrid, E-28040 Madrid, Spain;1. College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, PR China;2. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, PR China;3. College of Life and Environment Sciences, Central University for Nationalities, Beijing 100081, PR China;1. Dept. of Transport, Project and Process Technology, ETSICCP, Univ. of Cantabria, Ave. Castros s/n, 39005 Santander, Spain;2. Dept. of Construction, EPSIG, Univ. of Oviedo, Departmental Building 7, 33204 Gijón, Spain;1. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;2. Breeding Base for State Key Laboratory of Land Degradation and Ecological Restoration in Northwest China, Ningxia University, Yinchuan 750021, China;3. Dunhuang Gobi and Desert Ecology and Environment Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Dunhuang 736200, China;4. University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | The shelter effect of a windbreak protects aggregate piles and provides a reduction of particle emissions in harbours. RANS (Reynolds-averaged Navier–Stokes equations) simulations using three variants of k–ε (standard k–ε, RNG k–ε and realizable k–ε) turbulence closure models have been performed to analyse wind flow characteristics behind an isolated fence located on a flat surface without roughness elements. The performance of the three turbulence models has been assessed by wind tunnel experiments. Cases of fences with different porosities (φ) have been evaluated using wind tunnel experiments as well as numerical simulations. The aim is to determine an optimum porosity for sheltering effect of an isolated windbreak. A value of 0.35 was found as the optimum value among the studied porosities (φ=0, 0.1, 0.24, 0.35, 0.4, 0.5). |
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