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再悬浮底泥中非吸附性污染物释放的数值模拟

程鹏达 朱心广 冯春 王晓亮

程鹏达, 朱心广, 冯春, 王晓亮. 再悬浮底泥中非吸附性污染物释放的数值模拟[J]. 力学学报, 2020, 52(3): 689-697. doi: 10.6052/0459-1879-20-047
引用本文: 程鹏达, 朱心广, 冯春, 王晓亮. 再悬浮底泥中非吸附性污染物释放的数值模拟[J]. 力学学报, 2020, 52(3): 689-697. doi: 10.6052/0459-1879-20-047
Cheng Pengda, Zhu Xinguang, Feng Chun, Wang Xiaoliang. NUMERICAL SIMULATION ON THE RELEASE OF NON-ADSORPTION POLLUTANTS DURING THE SEDIMENT RESUSPENDED[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 689-697. doi: 10.6052/0459-1879-20-047
Citation: Cheng Pengda, Zhu Xinguang, Feng Chun, Wang Xiaoliang. NUMERICAL SIMULATION ON THE RELEASE OF NON-ADSORPTION POLLUTANTS DURING THE SEDIMENT RESUSPENDED[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 689-697. doi: 10.6052/0459-1879-20-047

再悬浮底泥中非吸附性污染物释放的数值模拟

doi: 10.6052/0459-1879-20-047
基金项目: 1)国家自然科学基金项目(11802313, 11872117), 国家重点基础研究发展计划项目课题(973课题)(2015CB250903), 中国科学院战略性先导科技专项(B类)子课题(XDB10030303)资助
详细信息
    通讯作者:

    2)冯春, 高级工程师, 主要研究方向: 水文地质灾害预防和治理. E-mail: fengchun@imech.ac.cn

  • 中图分类号: O352/O368

NUMERICAL SIMULATION ON THE RELEASE OF NON-ADSORPTION POLLUTANTS DURING THE SEDIMENT RESUSPENDED

  • 摘要: 环境水动力学中, 湖库底泥中污染物释放是人们研究的主要问题之一. 在水动力学条件作用下, 污染底泥再悬浮使大量污染物被重新释放出来, 造成水体的二次污染. 本文基于水槽实验研究提供的大量实测数据, 建立上覆水体-底泥-污染物的耦合力学模型. 在上覆水体不同流速条件下, 数值模拟底泥起动再悬浮过程以及污染物释放过程. 分析流场特性和污染物浓度之间的关系, 得到速度、颗粒体积分数、污染物浓度、湍动能以及时间等参数之间的定量关系. 研究表明, 底泥再悬浮污染物释放过程, 是由上覆水体-底泥-污染物构成的耦合过程. 迅速进入上覆水体的底泥颗粒, 影响了上覆水体流动特性, 进而影响到污染物的释放. 对于非吸附性污染物, 底泥起动后复杂的流场特性是底泥再悬浮污染物释放的主要影响因素. 当流场特性(如雷诺数)改变时, 对流和湍流扩散作用在污染物输运过程贡献不同. 建立上覆水体-底泥-污染物的耦合模型, 研究水动力学条件与底泥污染物释放规律的定量化关系, 可为构建湖库区域水污染模型提供支撑.

     

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出版历程
  • 收稿日期:  2020-02-15
  • 刊出日期:  2020-06-10

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