Modeling deposition of particles in vertical square ventilation duct flows |
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Authors: | Ran Gao Angui Li |
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Affiliation: | School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, 710055, Shaanxi, Xi''an, PR China |
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Abstract: | The presence, flow, and distribution of particle in heating, ventilation, and air-conditioning (HVAC) ducts influence the quality of air in buildings and hence the health of building occupants. To shed a better light on the flow of particles in HVAC ducts this a paper has considered the effects of drag, lift force, gravity, Brownian diffusion, and turbulent diffusion on the dimensionless deposition velocity of particles in smooth vertical ventilation ducts using fully developed and developing velocity profiles. Based on the Reynolds stress transport model (RSM) at two different air velocities, 3.0 m/s and 7.0 m/s, the aforementioned effects were predicted using Reynolds-averaged Navier–Stokes (RANS)–Lagrangian simulation on square shaped ducts under vertical flows. |
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Keywords: | Particles Ventilation ducts Computational fluid dynamics Lagrangian eddy lifetime model Dimensionless deposition velocities of particles Reynolds-averaged Navier&ndash Stokes equations |
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