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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2003.8
- 수록면
- 144 - 151 (8page)
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Computations of the mean and turbulence flows over three-dimensional hill of conical shape have implemented. Beside the standard k-ε, two other modifications proposed by Detering & Etling and Duynkerke for atmospheric applications were also considered. These predictions were compared with the data of a wind tunnel experiment. From the comparison, it was concluded that all three models predict
the mean flow velocities equally well while only the Duynkerke's model accurately predicts the turbulence data statistics. It also concluded that there are large discrepancies between model predictions and the measurements near the ground surface.
The flow field, which was obtained by using the Duynkerke's modification, was used to simulate gas dispersion from an upwind source. The calculation results are verified based on the measurement data. Modifications of the turbulent Schmidt number were carried out in order to match the measured results. The code was used to investigate the influence of the recirculation zone behind a building of cubical shape on the transport and dispersion of pollutant. For a stack behind and near the obstacle, some conclusions about the effect of the stack height and stack location were derive
the mean flow velocities equally well while only the Duynkerke's model accurately predicts the turbulence data statistics. It also concluded that there are large discrepancies between model predictions and the measurements near the ground surface.
The flow field, which was obtained by using the Duynkerke's modification, was used to simulate gas dispersion from an upwind source. The calculation results are verified based on the measurement data. Modifications of the turbulent Schmidt number were carried out in order to match the measured results. The code was used to investigate the influence of the recirculation zone behind a building of cubical shape on the transport and dispersion of pollutant. For a stack behind and near the obstacle, some conclusions about the effect of the stack height and stack location were derive
목차
Abstract
1. Introduction
2. Description of theoretical models
3. Solution procedure
4. Flow field simulation
5. Concentration field Simulation
6. Effects of recirculation zone behind a building on ground-level concentration
7. Conclusions
Acknowledgement
References
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UCI(KEPA) : I410-ECN-0101-2009-422-014585323