摘要
水体水面蒸发会改变滨水小区内气流和颗粒物扩散的特性。根据某滨水小区的几何参数建立三维模型,采用FLUENT软件对滨水小区内的气流场和颗粒物浓度场进行数值模拟。结果表明:相对湿度越大,小区流场内水蒸气的质量分数越大,但其增幅有所减小;不考虑颗粒物凝并的情况下,颗粒物质量浓度与相对湿度呈正比关系;随着水体水面蒸发的不断进行,水蒸气扩散范围越来越大,建筑物周围及横向主通道内水蒸气的含量越来越高,下风向处水蒸气的质量分数较上风向处低;水蒸气在水平方向上的扩散速率大于竖直方向上的扩散速率;水体可以有效降低滨水小区内的颗粒物质量浓度,促进颗粒物扩散。
Water surface evaporation can change the characteristics of airflow and particle dispersion in waterfront residence.Three-dimensional model of waterfront residence was established based on geometric parameters.FLUENT software was used to simulate the airflow field and particulate matter concentration field in the waterfront residence.The results showed that the larger the relative humidity,the greater the mass fraction of water vapor in flow field,but its growth was slow down.Without considering the condensation between particles,the mass concentration of particles was positively correlated with relative humidity.With the continuous evaporation of water surface,water vapor dispersion range became larger and larger,and the contents of water vapor around buildings and in the main transverse channel became higher and higher,but the mass fraction of water vapor at downwind was lower than that at upwind.The dispersion rate of water vapor in the horizontal direction was greater than that in the vertical direction.Water body could effectively reduce the mass concentration of particle,and promote the dispersion of particulate matter in waterfront residence.
作者
郭琼琼
文远高
唐虎
夏雨琳
明廷臻
徐千芃
GUO Qiongqiong;WEN Yuangao;TANG Hu;XIA Yulin;MING Tingzhen;XU Qianpeng(School of Civil Engineering and Architecture,Wuhan University of Technology,Wuhan Hubei 430070;Wuhan Metro Operation Co.,Ltd.,Wuhan Hubei 430030)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2020年第11期1319-1323,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.51778511)
武汉市建设科研项目(No.Ⅲ-JZ-16-103)。
关键词
水体
相对湿度
滨水小区
颗粒物
水面蒸发
water body
relative humidity
waterfront residence
particle
water evaporation
