潮汐流动中污染物垂向排放的整区计算模型  

A full-field model for a vertical jet discharging into tidal flows

作　　者：陈永灿[1] 周雪漪[1] 李玉梁[1] 

机构地区：[1]清华大学

出　　处：《水利学报》1992年第9期8-14,49,共8页Journal of Hydraulic Engineering

摘　　要：本文提出了合理进行远近区连接的整区计算模型.该模型适应了潮汐流动中垂向排污远近区不同的流动特点,通过近区采用的K-ε精细模型与远区采用的零方程模型的有机连接,既满足了排放口附近计算精度的要求。也不增大远区的计算工作量,对于大水域中污染物扩散的数值计算具有明显的优越性.通过对潮汐水槽实验资料的验算,得到实验结果的良好映证.对广州市污水排放珠江海心沙河段的分析计算,结果合理可靠.In this paper a complete model is proposed,it is suitable for both near-field and far-fields of a vertical jet discharging into tidal flows.The k-s model is used for near-field and the mixing-length model is used for far-field to fit different flow characteristics.Proper conditions to connect the two models are adapted in order to meet the computing precision of the flow near the inlet of the jet without increasing the computing work of the flow far from the inlet.The advantage of this method will toe notable,if numerical calculation is conducted for diffusive transport of pallutants discharging into large water body.Comparisions between the numerical predictions and previous experiment results are described Reasonable results for the wastewater of Guangzhou City discharging into Zhujang River have been obtained by this method.

关 键 词：潮汐 流动 污染物 垂向排放 

分 类 号：P731.23[天文地球—海洋科学]