Modeling aerodynamic and diffusion processes in planar, room-shaped working
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A numerical model was constructed for the aerodynamics of planar chambers and diffusion of impurities in the chamber atmosphere in a two-dimensional arrangement.
A method is proposed for determining the coefficients of turbulent diffusion in planar chambers, based on parallel physical and mathematical modeling.
Upon increasing the degree of horizontal flow constraint and the length of the chamber, a variation is observed in the ventilation pattern in planar chambers: from a recirculation pattern to direct flow-recirculation and direct flow. Reducing the velocity at the inlet to the chamber leads to a more rapid growth in eddy currents in the corners of the chamber.
With a direct-flow pattern of ventilation, a smooth reduction is observed in concentration at the outlet over time. With a recirculation pattern, additional maxima in concentration are observed, caused by the diffusion and transfer of impurities by eddy currents. Under conditions of direct-flow-recirculation ventilation, secondary maxima are very weakly expressed.
KeywordsTurbulent Diffusion Impurity Transfer Chamber Atmosphere Recirculation Pattern Planar Chamber
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- 1.K. Yu. Laigna, Mathematical Modeling of Diffusion Processes in the Ventilation of Drift-Room-Shaped Workings [in Russian], Tallin (1979).Google Scholar
- 2.A. S. Monin and A. M. Yaglom, Statistical Fluid Mechanics, MIT Press (1975).Google Scholar
- 3.J. Smagorinsky, “General circulation experiments with primitive equations,” Mon. Weath. Rev.,91, No. 3, (1963).Google Scholar
- 4.V. V. Penenko, Methods of Numerical Modeling for Atmospheric Processes [in Russian], Gidrometeoizdat, Leningrad (1981).Google Scholar
- 5.G. I. Marchuk, Methods of Computational Mathematics [in Russian] Nauka, Moscow (1977).Google Scholar
- 6.V. V. Penenko and A. E. Aloyan, “Numerical method of calculating fields for meteorological elements in the boundary layer of the atmosphere,” Meteorol. Gidrolog., No. 6 (1981).Google Scholar
- 7.N. I. Buleev and G. I. Timukhin, “Numerical solution of hydrodynamics equations for the planar flow of a viscous, incompressible liquid,” Izv. Sib. Otd. Akad. Nauk SSSR, Ser. Tekh. Nauk, No. 3, Issue 1 (1969).Google Scholar
- 8.A. E. Aloyan, D. L. Iordanov, and V. V. Penenko, “Numerical model of impurity transfer in the boundary layer of the atmosphere,” Meteorol. Gidrolog., No. 8 (1981).Google Scholar
- 9.G. V. Kalabin, “Experimental study of bounded turbulent flows,” Fiz. Tekh. Probl. Razrab. Polezn. Iskop., No. 3 (1981).Google Scholar
- 10.G. V. Kalabin, “Character and patterns in processes of thinning and transport of gaseous products in slit-shaped chambers,” Fiz.-Tekh. Probl. Razrab. Polezn Iskop., No. 1 (1983).Google Scholar