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Wind and Structures Volume 28, Number 2, February 2019 , pages 129-140 DOI: https://doi.org/10.12989/was.2019.28.2.129 |
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Spatial correlation-based WRF observation-nudging approach in simulating regional wind field |
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Hehe Ren, Shujin Laima, Wen-Li Chen, Anxin Guo and Hui Li
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| Abstract | ||
| Accurately simulating the wind field of large-scale region, for instant urban areas, the locations of large span bridges, wind farms and so on, is very difficult, due to the complicated terrains or land surfaces. Currently, the regional wind field can be simulated through the combination of observation data and numerical model using observation-nudging in the Weather Research and Forecasting model (WRF). However, the main drawback of original observation-nudging method in WRF is the effects of observation on the surrounding field is fully mathematical express in terms of temporal and spatial, and it ignores the effects of terrain, wind direction and atmospheric circulation, while these are physically unreasonable for the turbulence. For these reasons, a spatial correlation-based observation-nudging method, which can take account the influence of complicated terrain, is proposed in the paper. The validation and comparation results show that proposed method can obtain more reasonable and accurate result than original observation-nudging method. Finally, the discussion of wind field along bridge span obtained from the simulation with spatial correlation-based observation-nudging method was carried out. | ||
| Key Words | ||
| wind field; complex terrain; spatial correlation-based WRF observation-nudging method; long-span bridges; wind heterogeneous distribution character; local wind environment | ||
| Address | ||
| Hehe Ren, Shujin Laima, Wen-Li Chen, Anxin Guo and Hui Li:Key Lab of Smart Prevention and Mitigation for Civil Engineering Disasters of the Ministry of Industry and Information, Harbin Institute of Technology, Harbin, 150090, China; Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education, Harbin Institute of Technology, Harbin, 150090, China; School of Civil Engineering, Harbin Institute of Technology, Harbin, 150090, China | ||