WRF-Fluent耦合模式的构建及其对城市大气扩散的精细化模拟

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Abstract

To accurately characterize the effect of complex urban building structures on pollutant transport and diffusion processes, a one-way coupled WRF-Fluent model was constructed and applied to simulate the pollutant dispersion from an elevated source in Yuzhong county. The performance of WRF model was validated systematically using data obtained from the Urban Meteorological and Tracer Experiment, and it is found that WRF can provide accurate and time-varying meteorological driving field for Fluent. The spatial and temporal evolution of the flow field and pollution plume in Yuzhong County was simulated explicitly using WRF-Fluent model with embedded three-dimensional geometric model of Yuzhong County and the results were compared to the measured tracer concentration data. The WRF-Fluent model can well reproduce the complex flow patterns and the evolution of the polluted plume. The simulated maximum ground level and urban canopy top concentrations are within a factor of three of the observations. The constructed WRF-Fluent model has good performance for urban dispersion, and is an effective tool for urban planning, urban air quality management and environmental risk assessment.

Key words： urban dispersion WRF fluent one-way coupling numerical simulation

Received: 05 November 2018

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X51

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	Articles by authors
	DONG Long-xiang
	YU Ye
	ZUO Hong-chao
	FANG min
	ZHAO Su-ping
	CHEN Bo-long

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DONG Long-xiang,YU Ye,ZUO Hong-chao等. Elaborated simulation of urban atmospheric dispersion using an established WRF-Fluent coupling model[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(6): 2311-2319.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I6/2311

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