首页|Large eddy simulation study of 3D wind field in a complex mountainous area under different boundary conditions

Large eddy simulation study of 3D wind field in a complex mountainous area under different boundary conditions

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Large eddy simulations generally are used to predict 3D wind field characteristics in complex mountainous areas.Certain simulation boundary conditions,such as the height and length of the computational domain or the characteristics of inflow turbulence,can significantly impact the quality of predictions.In this study,we examined these boundary conditions within the context of the mountainous terrain around a long-span cable-stayed bridge using a wind tunnel experiment.Various sizes of computational domains and turbulent incoming wind velocities were used in large eddy simulations.The results show that when the height of the computational domain is five times greater than the height of the terrain model,there is minimal influence from the top wall on the wind field characteristics in this complex mountainous area.Expanding the length of the wake region of the computational domain has negligible effects on the wind fields.Turbulence in the inlet boundary reduces the length of the wake region on a leeward hill with a low slope,but has less impact on the mean wind velocity of steep hills.

Large eddy simulation(LES)Spectral representation methodRecycling methodHigh mountainous canyonWind characteristicsAtmospheric boundary layerComputational domain

Yan LI、Lei YAN、Xuhui HE

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School of Civil Engineering,Central South University,Changsha 410075,China

National Engineering Research Center for High-speed Railway Construction,Changsha 410075,China

Hunan Provincial Key Laboratory for Disaster Prevention and Mitigation of Rail Transit Engineering Structures,Changsha 410075,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Foundation of Hunan Province,ChinaNatural Science Foundation of Hunan Province,China

51925808521785162020JJ57452023JJ20073

2024

10.1631/jzus.A2300613

浙江大学学报(英文版)(A辑:应用物理和工程)
浙江大学

浙江大学学报(英文版)(A辑:应用物理和工程)

CSTPCD
影响因子：0.556
ISSN：1673-565X
年,卷(期)：2024.25(7)
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