Proceedings of the 51st Anniversary Conference of KSME PHYSICAL MODELING OF ATMOSPHERIC FLOW AND ENVIRONMENTAL APPLICATIONS
نویسنده
چکیده
The philosophy of physical modeling of atmospheric flow is discussed with special emphasis on wind-tunnel simulation techniques. The governing equations of motion are analyzed for application of laboratory testing. Key similitude parameters such as Reynolds, Froude, Rossby, and Richardson numbers, as applied to wind-tunnel requirements, are discussed. Prevalent boundary condition requirements, i.e., Jensen’s criterion and fully rough flow, are presented. Physics of atmospheric boundary layers are presented in the context of practical laboratory applications. The stack dispersion process of plume rise and diffusion into the atmosphere are discussed for near-field and far-field wind-tunnel simulations. Stack downwash, buoyant and non-buoyant stack processes are examined through experimental testing of full-scale cases and results are compared to wind-tunnel measurements made to simulate the results. Additionally, wind-tunnel results are compared to Gaussian-based computer models (ISCSTII and INPUFF). Comparisons illustrate that sitespecific wind-tunnel results provide better assessment of the dispersion process than do the generic Gaussian models. Wind-tunnel testing is strongly recommended for complex geometry and/or unique topographic conditions.
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