蛟路江河口海域污染分析及非线性扩散数值解

在分析蛟路江河口海域流态和污染规律的基础上,考虑盐淡水混合河口海域的污染非线性扩散现象,用有限元法进行数值分析计算,对数值解的稳定性进行了探讨,并将计算值与实测值进行了比较、验证.

ANALYZING POLLUTION PATTERN IN SEAWARD FIRTH OF JIAOLU JIANG WITH A NUMERICAL METHOD OF NONLINEAR DIFFUSION

On the basis of analyzing the flow regime and pollution patternof the sea area of Jiaolu Jiang Firth, the pollutant nonlinear diffusion phenomenum in the seaward firth with mixed-up salt and fresh water is studied. The finite element method is used for conducting numerical analysis and the stability of the numerical solution is also investigated. Comparing the calculation data with the measured one, it is shown that the obtained result has better accuracy.This paper treats seaward firth as a dynamic system, divide the solution domain into finite elements and find the solution by a punitive function,variable size combinatorial method and non-linear optimization solution.In order to ensure solution stability,use non-dimension variables and take time-step as control condition.