Numerical simulation of the spread of bacteria in water flow considering the process of reproductions

2018 2nd International Conference on Environmental and Energy Engineering

生态环境科学;能源学

Zhang, Xiaoxi^1,2 ; Zhao, Chao^1,2 ; Guo, Namei^1,2 ; Chen, Qiuhua^3

School of Environmental Science and Engineering, Xiamen University of Technology, Xiamen

361024, China^1

Key Laboratory of Environmental Biotechnology, Fujian Province University, Xiamen

361024, China^2

School of Civil Engineering and Architecture, Xiamen University of Technology, Xiamen

361024, China^3

关键词: Advection;    Diffusion;    Recirculation regions;    Simple approach;    Solution strategy;    Water flows;    Water quality variations;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/146/1/012040/pdf
DOI  :  10.1088/1755-1315/146/1/012040

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In this paper, a simple approach for modelling the reproduction of bacteria in water flow is presented. Firstly, the basic mathematical model for simulating the advection-diffusion of pollutions in water flow is reviewed and validated. Then, a solution strategy of doubling the concentration at regular intervals by the basic model is proposed. This approach is easy to be implemented in the existing flow field solver and is proved to be feasible by simulating a standard example. Finally, the spread of the bacterial pollution in a pool is simulated. The result shows that the water quality variation in the pool can be attributed to both the flow patterns of the water flow and the reproduction characteristics of the bacteria. The recirculation region limits the spread of the bacteria, which induces the continuous deterioration of water quality when considering the reproduction of the bacteria.