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DOI | 10.1016/j.atmosres.2017.01.016 |
Numerical simulation of wind-induced turbulence over precipitation gauges | |
Baghapour, Behzad1; Wei, Cao1,2; Sullivan, Pierre E.1 | |
2017-06-01 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2017 |
卷号 | 189 |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Peoples R China |
英文摘要 | To better quantify measurement uncertainty associated with solid precipitation gauges, time averaged and transient turbulent flow over gauges is studied using a Computational Fluid Dynamic (CFD) approach. By numerically solving the Reynolds-Averaged Navier-Stokes (RANS) equations, vortex formation in the bulk structure of the flow is examined. To study transient effects, Large-Eddy Simulation (LES) quantified the turbulence and eddy dynamics. The simulated gauge is a Geonor T200B gauge shielded with Alter slats for a wind velocity ranging from 1 to 10 m/s. A multi-layer mesh generation technique allows the capture of a wide range of turbulent length scales. Gauge exposure effects on the wind characteristics are investigated for unshielded and shielded cases. Updrafting results in an effective collection area of only 30% of the orifice for capturing precipitation. The RANS results show wind momentum reduction above the gauge orifice from shielding with vertical slats assists catch efficiency of the gauge. However, tilting the slats in high winds degenerates shielding benefits. LES results show considerable production of turbulence kinetic energy near the inlet orifice area. Transient analysis with LES demonstrates that the shields intensify the turbulence near the gauge. With the addition of wind shields, the flow momentum above the gauge is reduced. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | Gauge Windshield Vorticity RANS LES |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000398007400008 |
WOS关键词 | MODELS ; SNOW ; ACCURACY ; FLOW ; LES |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/15197 |
专题 | 地球科学 |
作者单位 | 1.Univ Toronto, Dept Mech & Ind Engn, 5 Kings Coll Rd, Toronto, ON M5S 3G8, Canada; 2.Harbin Inst Technol, Sch Astronaut, 92 West Dazhi St, Harbin 150001, Peoples R China |
推荐引用方式 GB/T 7714 | Baghapour, Behzad,Wei, Cao,Sullivan, Pierre E.. Numerical simulation of wind-induced turbulence over precipitation gauges[J]. ATMOSPHERIC RESEARCH,2017,189. |
APA | Baghapour, Behzad,Wei, Cao,&Sullivan, Pierre E..(2017).Numerical simulation of wind-induced turbulence over precipitation gauges.ATMOSPHERIC RESEARCH,189. |
MLA | Baghapour, Behzad,et al."Numerical simulation of wind-induced turbulence over precipitation gauges".ATMOSPHERIC RESEARCH 189(2017). |
条目包含的文件 | 条目无相关文件。 |
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