海洋柱体结构壁面污染物对流扩散的数值模拟  

Numerical simulation of convective diffusion of pollutants on the wall surface of ocean pillar structure

作　　者：芦静 林建国[1] 谢悦 LU Jing;LIN Jian-guo;XIE Yue(College of Environment Science and Engineering,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]大连海事大学环境科学与工程学院,辽宁大连116026

出　　处：《海洋环境科学》2021年第1期87-92,共6页Marine Environmental Science

摘　　要：对于柱体绕流问题,国内外学者已经进行了大量研究,但对柱体表面涂料对海洋环境产生的污染问题却少有研究。本文对二维圆柱绕流作用下壁面污染物扩散引起的浓度场进行了数值模拟,在雷诺数为75~175圆柱绕流产生的振荡涡流场中,将圆柱表面污染物质作为壁面污染源,进行了多种振荡涡流场条件下浓度场的计算,分析了浓度场与涡流场之间的关联及其分布规律。数值模拟结果表明,在振荡涡流场的作用下,污染物的浓度分布与涡的分布同步,漩涡中心的浓度值相对较高,漩涡边缘的浓度值相对较低。随着雷诺数的增加,涡心附近的浓度值呈下降趋势。For the problem of flow around the cylinder,many domestic and foreign scholars have done a lot of research,but there is limited research on the pollution caused by the surface coating of the column to the marine environment.In this paper,the concentration field caused by the wall surface contaminant flow under the action of two-dimensional cylinder is numerically simulated.Under the oscillating eddy current field generated by the flow around a cylinder with a Reynolds number of 75~175,the cylindrical surface pollutants are used as the wall condition,the concentration field under various oscillating eddy current fields is analyzed,and the correlation and distribution law between the concentration field and the eddy current field are analyzed.The numerical simulation results show that under the action of the oscillating eddy current field,the concentration distribution of the pollutants is synchronized with the distribution of the vortex,the concentration of the center of the vortex is relatively high,and the concentration at the edge of the vortex is relatively low.As the Reynolds number increases,the concentration of the vortex position decreases.

关 键 词：圆柱绕流 振荡涡流 壁面污染物 对流扩散 

分 类 号：X143[环境科学与工程—环境科学]