挥发性毒物水气耦合扩散模型  

Model for coupling diffusion of volatile poisons in water and air

作　　者：陈丽萍[1] 蒋军成[1] 韩冬梅[1] 

机构地区：[1]南京工业大学城市建设与安全工程学院,江苏南京210009

出　　处：《水科学进展》2009年第4期549-553,共5页Advances in Water Science

基　　金："十一五"国家科技支撑计划资助项目(2006BAK01B02-03);教育部新世纪优秀人才支持计划资助项目(NCET-05-0505)~~

摘　　要：挥发性毒物泄漏进入天然水体造成水污染,因其挥发又造成空气污染。为反映水污染与空气污染的耦合影响,以体积比函数方法建立的体现气液交界面流动的水气动力学模型为基础,根据挥发作用中的双膜理论,利用量纲一亨利常数,建立挥发性毒物水气耦合扩散模型,以描述毒物在水体、空气及气液交界面的迁移过程。对挥发性毒物泄漏实例和水气交换实验进行数值模拟,模拟结果与实测结果较吻合。同时,还分析了水流湍动、风速及量纲一亨利常数对挥发性毒物在气液交界面上传质过程的影响。The spill of the volatile poisons into natural waters causes water pollution and air pollution arises from the volatilization of water pollution. In order to explain the coupling of water pollution and air pollution, the dynamical model is put forward by using the volume of fluid method, in which there is gas-liquid interface flow term. According to the double-film theory explaining the volatilization, the dimensionless Henry constant of the volatile poisons is used to establish the coupling diffusional model in which the transport of the volatile poisons in water and air and mass transfer across gas-liquid interface are presented together. The spill of the volatile poison into the Mississippi River and a gas-water experiment are simulated. The simulation results are in exactly agreement with those of the experiment. The simulation analyzes the influence of the turbulence of water, wind velocity and the dimensionless Henry constant on the mass transfer across gas-liquid interface.

关 键 词：挥发性毒物 体积比函数 水气耦合扩散模型 

分 类 号：TV131.2[水利工程—水力学及河流动力学] X131[环境科学与工程—环境科学]