Wind tunnel studies of gas dispersion from ground level source

Abstract

Abstract. Measurements of gas dispersion from ground source were performed in a boundary layer wind tunnel in VZLU Prague. The measurements include non-buoyant gas dispersion behind a ground level source on a flat plane, on a simple rectangular building model and behind a model hill and rectangular barrier. These measurements will serve for verification of a new gas dispersion software being developed in VZLU. The dispersion model is intended for use by firemen and ambulance services in the case of an accident for immediate estimation of the area with dangerous gas concentration. The dispersion model will use precalculated results for chosen areas in the Czech Republic with industrial plants and residential building in the neighborhood. The size of contaminated area will be estimated using actual meteorological situation, i.e. wind speed and direction etc. and precalculated data of flow and dispersion in the chosen location.

Simulation of the mixture flow over terrain wave

“…We chose to simulate the flow over the rough terrain with the sinus wave geometry, accordingly to experiments shown in [12]. Lenght of the wave was set to 0.800 m, height to 0.114 m. as turbulence generator.…”