Abstract
The numerical simulations of flow and pollutant particle dispersion are described for twodimensional bell shaped hills with various aspect ratios. The Reynolds-averaged incompressible Navier-Stokes equations with low Reynolds numberk-ɛ turbulent model are used to simulate the flowfield. The gradient diffusion equation is used to solve the pollutant dispersion field. The code was validated by comparison of velocity, turbulent kinetic energy, Reynolds shear stress, speed-up ratio, and ground level concentration with experimental and numerical data. Good agreement has been achieved and it has been found that the pollutant dispersion pattern and ground level concentration have been strongly influenced by the hill shape and aspect ratio, as well as the location and height of the source.
Similar content being viewed by others
References
Arya, S. P. S., Capuano, M. E. and Fagen, L. C, 1987, “Some Fluid Modeling Studies of Flow and Dispersion over Two-Dimensional Low Hills,”Atmospheric Environment, Vol. 21, No. 4, pp. 753–764.
Castro, LP. and Apsley, D.D., 1997, “Flow and Dispersion over Topography: A Comparison Between Numerical and Laboratory Data for Two-Dimensional Flows,”Atmospheric Environment, Vol. 31, No. 6, pp. 839–850.
Chien, K. Y., 1982, “Prediction of Channel and Boundary-Layer Flows with a Low-Reynolds Number Turbulent Model,”AIAA Journal, Vol. 20, No. 1, pp. 33–38.
Dyer, A. J., 1974, “A Review of Flux-profile Relationships,”Boundary-Layer Meteorology, Vol. 7.
Gaskell, P. H. and Lau, A. K. C, 1988, “Curvature-Compensated Convective Transport: SMART, a New Boundedness-Preserving Transport,”International Journal for Numerical Methods in Fluids, Vol. 8, pp. 617–641.
Gong, W. and Ibbetson, A., 1989, “A Wind Tunnel Study of Turbulent Flow over Model Hills,”Boundary-Layer Meteorology, Vol. 49, pp. 113–148.
Gong, W. 1991, “A Wind Tunnel Study of Turbulent Dispersion over Two-and Three-Dimensional Gentle Hills from Upwind Point Sources in Neutral Flow,“Boundary-Layer Me-teorology, Vol. 54, pp. 211–230.
Kim, H. G., Lee, C. M., Lim, H. C. and Kyong, N. H., 1997a, “An Experimental and Numerical Study on the Flow over Two-dimensional Hills,”Journal of Wind Engineering and Industrial Aerodynamics, Vol. 66, pp. 17–33.
Kim, H. G. and Lee, C. M., 1997b, “Numerical Analysis of the Two-Dimensional Pollutant Dispersion Over Hilly Terrain,”Journal of Korea Air Pollution Research Association, Vol. 13, No. 5, pp. 383–396. (in Korean)
Park, W. G. and Sankar, L.N., 1991, “An Iterative Time Marching Procedure for Unsteady Viscous Flows,”ASME-BED. Vol. 20, pp. 281–284.
Park, W. G. and Sankar, L. N., 1993, “A Technique for the Prediction of Unsteady Incompressible Viscous Flows,”AIAA Paper 93-3006.
Raupach, M. R. and Legg, B. J., 1983, “Turbulent Dispersion from an Elevated Line Source: Measurement of Wind-Concentration Moments and Budgets,”Journal of Fluid Mechanics, Vol. 136, pp. 11–137.
Robert, P. T., Fryer-Taylor, R. E. J., 1994, “Wind Tunnel Studies of Roughness Effects in Gas Dispersion,”Atmospheric Environment, Vol. 28, No. 11, pp. 1861–1870.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Jung, YR., Park, K., Park, WG. et al. Numerical analysis of flow and pollutant dispersion over 2-d bell shaped hills. KSME International Journal 17, 1054–1062 (2003). https://doi.org/10.1007/BF02982990
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF02982990