【长江水系典型河段水质污染模型及其数值模拟】侯国祥.pdf

MODELONTYPICALREACHOFYANGTZERIVER WATERSYSTEMWATERPOLLUTION ANDITSNUMERICALSIMULATION By HOUGUOXIANG Supervised by Prof.Shi Zhongkun and Vice Prof.Li Qi A Dissertation Submitted to the GraduateSchool of HuazhongUniversityof Science andTechnology FortheDoctoralDegreeofPhilosophy inDesign andManufac

华中理工大学博士学位论文出了一些解决意见.第七章,在流场计算的基础上,以某一流线作边界,重新划分网格,结合环境流体力学的特点对COD浓度的对流、扩散问题进行了专门研究,结合长江及其支流的大量实地资料对扩散系数、衰减系数进行了统计研究及模型率定,得出了一些合理的参数为以后进一步的研究打下了良好的基础.自然河流中,由于计算区域较大,通常网格尺度较大,速度场的计算较为复杂.对于宽浅型河流,采用深度平均法进行流场计算时,用得较多的有两类模型:一类是不增加任何脉动量的偏微分方程的模型,这类模型已在适体坐标下运用得较多且较成功.

华中理工大学博士学位论文 isk- model.The kequation and equation are needed,besides mass and momentum conservation equations.Manyresearchers have studied the depth-averaged mathematical models of turbulence in recent years.However,the models were used mostly in regular artificial canals or naturalwater areas w