Analysis of unsteady concentration and flow statistics around an isolated building by Large-Eddy Simulation
نویسندگان
چکیده
Large-Eddy Simulation is used to simulate wind-induced pollutant dispersion from a vent on the roof of a cubical building. The profiles of the computed mean value and standard deviation of the concentration in the wake of the building are compared to wind-tunnel measurements and good agreement is found. The velocity and concentration values at two monitoring points located in the shear layer developing above the roof have been sampled at each time step of the simulation. The statistics are presented and analyzed to provide insight into the dispersion process. In particular, the fact that the turbulent mass flux in the streamwise direction is directed from the low to high levels of mean concentration (counter-gradient mechanism) is explained.
منابع مشابه
Large-Eddy Simulation of pollutant dispersion around a cubical building: analysis of the turbulent mass transport mechanism by unsteady concentration and velocity statistics.
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