Abstract
With the Smagorinsky subgrid model and the transport equation, a large-eddy simulation was carried out for the dispersion of a plume, which was emitted from an upwind low-level source, around an isolated building. In this simulation, mesh density was controlled within 100 times Kolmogorov microscale and the inflow condition with specified turbulent characteristics was generated by random number method. The simulation demonstrates that the distribution and magnitude of mean concentration in the wake region of the building was influenced not only by local flow patterns, but also by plume rise due to building blockage as well as by plume captured by horseshoe vortices. In comparison with results from wind-tunnel experiments, it shows that the LES can reproduce flow patterns and concentration distribution around the building well to reflect the effects of buildings on pollutant dispersion.
| Original language | English |
|---|---|
| Pages (from-to) | 284-288 |
| Number of pages | 5 |
| Journal | Yingyong Lixue Xuebao/Chinese Journal of Applied Mechanics |
| Volume | 24 |
| Issue number | 2 |
| Publication status | Published - Jun 2007 |
Keywords
- Air pollutants
- Building-effects
- Dispersion
- LES