Numerical simulation of wind speed impact on infrared extinction area in the aerosol diffusion

Haihao He; Youlin Gu; Jiajie Fang; Yihua Hu; Hao Cao; Wanying Ding; Xi Chen; Xinyu Wang

doi:10.1117/12.2648199

14 October 2022 Numerical simulation of wind speed impact on infrared extinction area in the aerosol diffusion

Haihao He, Youlin Gu, Jiajie Fang, Yihua Hu, Hao Cao, Wanying Ding, Xi Chen, Xinyu Wang

Proceedings Volume 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022); 1234327 (2022) https://doi.org/10.1117/12.2648199
Event: 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 2022, Qingdao, China

Abstract

With the development of extinction materials, various materials suitable for smoke are widely used. Smoke is essentially composed of solid aerosol. The extinction properties of aerosol are affected by diffusion characteristics. Aerodynamics is used to describe the motion of aerosol particles. Normal 𝑘 - 𝜀 model and DPM model are used to simulate aerosol diffusion process in outdoor environment. The diffusion law of aerosol under different wind speed is analyzed. Distribution characteristics of aerosol mass concentration is studied. Combined with Lambert-Beer law, the effective infrared extinction area of aerosol is calculated. The result shows that the wind speed play an important role in aerosol diffusion in the initial state. When the wind speed is near 1m/s, aerosol can diffuse steadily, and the extinction area will show a trend of rise. In addition, the area of effective concentration will not decrease too fast, but will show a trend of slow rise and begin to decline after 30s.

Citation Download Citation

Haihao He, Youlin Gu, Jiajie Fang, Yihua Hu, Hao Cao, Wanying Ding, Xi Chen, and Xinyu Wang "Numerical simulation of wind speed impact on infrared extinction area in the aerosol diffusion", Proc. SPIE 12343, 2nd International Conference on Laser, Optics and Optoelectronic Technology (LOPET 2022), 1234327 (14 October 2022); https://doi.org/10.1117/12.2648199

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KEYWORDS

Aerosols

Diffusion

Atmospheric modeling

Atmospheric particles

Infrared radiation

Motion models

Clouds

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