水利水电科技进展2025，Vol.45Issue(3)：23-31,39,10.DOI:10.3880/j.issn.1006-7647.2025.03.004
雷诺数对弯道水流点源污染物输运影响的大涡模拟研究
Large eddy simulation study on influence of Reynolds number on transport of point source pollutants in bend flow
摘要
Abstract
In order to predict the transport processes and distribution laws of point source pollutants in continuous bend flow when water pollution accidents occurs,a three-dimensional continuous bend flow pollutant transport model was constructed using the WALE-based large eddy simulation method.Numerical simulations were conducted under four different Reynolds number conditions to investigate the hydrodynamic structures and transport characteristics of point-source pollutants.The effects of Reynolds number variation on hydrodynamic structure and turbulence characteristics were analyzed.By comparing the spatial distribution characteristics and mixing rates of point-source pollutants in the lower reaches of curved channel under different Reynolds number conditions,the transport mechanisms of pollutants under the combined action of secondary circulation and turbulent transport were revealed.The results show that with the increase of the Reynolds number,the average circulation intensity on the cross-section is weakened,and the flow structure becomes more uniform.The average lateral and vertical dispersion coefficients of pollutants along the route are exponentially negatively correlated with the Reynolds number.The spatial mixing degree of pollutants is positively correlated with the Reynolds number.The percentage of fully mixed area of pollutants is negatively correlated with the Reynolds number.关键词
弯道水流/雷诺数/大涡模拟/点源污染/混合规律Key words
bend flow/Reynolds number/large-eddy simulation/point-source pollution/mixing rule分类
水利科学引用本文复制引用
杨安邦,朱海,陈盛,方超,徐溦珺,陆晨雪,王玲玲,余真真..雷诺数对弯道水流点源污染物输运影响的大涡模拟研究[J].水利水电科技进展,2025,45(3):23-31,39,10.基金项目
国家重点研发计划项目(2022YFC3202605) （2022YFC3202605）
国家自然科学基金项目(52479062) （52479062）
黄河水利委员会优秀青年人才科技项目(HQK-202320) （HQK-202320）
