Water quality model with axial dispersion solved by Eulerian-Lagrangian operator-splitting method in water distribution system
| Autor: | Tianyu Long, Yun Bai, Guoqiang Chen |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Computer simulation
Chemistry 0208 environmental biotechnology Environmental engineering 02 engineering and technology Mechanics 01 natural sciences 020801 environmental engineering 010101 applied mathematics Pipeline transport Flow velocity Dispersion (optics) Node (physics) Embedding Upstream (networking) Water quality 0101 mathematics Water Science and Technology |
| Zdroj: | Water Supply. 18:831-842 |
| ISSN: | 1607-0798 1606-9749 |
| DOI: | 10.2166/ws.2017.143 |
| Popis: | This study explores the effects of water quality simulation results by embedding axial dispersion into the classical advective-reactive model in a water distribution system. The Eulerian-Lagrangian operator-splitting method is employed to solve the model with axial dispersion. Satisfactory results were obtained after the numerical solution was tested against the analytical and other numerical solutions. The water quality simulation results without the reaction item show that when water velocity is low (or Peclet numbers are small), dispersion is dominant and significantly affects the numerical simulation results. The contaminant concentration at downstream node gradually increased with time along the upstream pipelines from the source, which is particularly reflected in the terminal. The simulation results show that the biomass concentration may demonstrate synthetic effects of axial dispersion and reaction, i.e. mutual promotion, given the multicomponent (substrate, residual chlorine, and microbial biomass) reaction-transport processes. It is particularly reflected in the low flow velocity. |
| Databáze: | OpenAIRE |
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