水科学进展2012，Vol.23Issue(6)：822-828,7.
水流交汇区污染物输移扩散特性
Study on transportation and diffusion characteristics of contaminants at flow confluence
摘要
Abstract
In order to analyze transportation and diffusion characteristics of contaminants at flow confluence, this paper presents the results of a series of experiments that were conducted and the numerical simulation study for probing distribution rules at flow confluence. A two-phase flow model applicable to confluences was established, and it was verified by experimental results. Experiments and numerical simulation were performed for different conditions. The results indicate that; A long and narrow contaminated zone is formed near the tributary side; and, the smaller junction angle and flow ratio (momentum ratio) are narrower with contaminated zone; within the contaminated zone, the gradient of concentration is great; and, contaminants distribution at the confluence is mainly determined by the effects of transportation and diffusion. These study results can provide a scientific basis for environmental evaluation , management and pollution control of river confluence.关键词
水流交汇区/污染物/输移扩散/数值模拟Key words
flow confluence/ contaminants/ transportation and diffusion/ numerical simulation分类
建筑与水利引用本文复制引用
魏娟,李然,康鹏,刘盛赟..水流交汇区污染物输移扩散特性[J].水科学进展,2012,23(6):822-828,7.基金项目
国家自然科学基金资助项目(51179111) （51179111）
