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2 years ago in CFD Simulation , Environmental Engineering By Deepthi G
Which software or models are best for studying exhaust gas dispersion from underground parking?
We're consulting on a new development and need to model CO and NOx dispersion from the parking garage vents to ensure compliance with air quality standards at nearby pedestrian levels. I'm familiar with AERMOD for area sources, but a garage is a complex, confined space with jets. Is there a more suitable class of model?
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By Princy Answered 1 year ago
For this specific problem, I would recommend a two-tiered approach based on my experience. For a screening-level analysis to check compliance at the property boundary, regulatory tools like AERMOD or CALPUFF can be used, treating vents as point sources. However, for detailed design of vent placement and assessing pedestrian-level concentrations in the immediate near-field where building downwash and jet momentum matter you need Computational Fluid Dynamics (CFD). I have used ANSYS Fluent or OpenFOAM for this. They allow you to explicitly model the building geometry, wind flow, and the buoyant jet from the vent, giving you a much more realistic, defensible result for sensitive receptor locations.
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