CFD Modeling of Flue Gas Pollution Dispersion

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SUMMARY

The discussion centers on the challenges of modeling flue gas pollution dispersion using Computational Fluid Dynamics (CFD). The k-epsilon turbulence model, previously used for liquid modeling in Ansys, is questioned for its applicability to gas dispersion. Key considerations include the differences in flow mechanics between gases and liquids, the appropriateness of incompressible models, and the common turbulence models used in CFD for this specific application. Effective modeling of atmospheric flue gas dispersion requires a solid understanding of gas flow mechanics.

PREREQUISITES
  • Understanding of k-epsilon turbulence model in CFD
  • Familiarity with Ansys software for CFD simulations
  • Knowledge of gas flow mechanics and dispersion principles
  • Experience with turbulence modeling techniques in CFD
NEXT STEPS
  • Research the differences between gas and liquid flow mechanics in CFD
  • Explore the applicability of incompressible models for gas dispersion
  • Study alternative turbulence models for flue gas dispersion, such as LES or RANS
  • Learn about the specific requirements for modeling atmospheric dispersion in CFD
USEFUL FOR

Environmental engineers, CFD analysts, and researchers focused on air quality modeling and pollution dispersion studies.

FluidStu
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I've previously studied and used the k-epsilon turbulence model within Ansys to model water in a small stirred vessel. I am now interested in CFD models appropriate for modeling flue gas dispersion.

I'd like to know:
  • What additional considerations are required for modeling a gas as opposed to a liquid?
  • Is the k-epsilon model appropriate? If not, why not?
  • Is it suitable to use incompressible models?
  • What are the most common turbulence models applied within CFD packages for modeling flue gas pollution dispersion?
Many thanks.
 
Last edited:
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Atmospheric flue gas dispersion is an exceptionally difficult problem to model effectively .

Starting from your apparently zero knowledge of the complex flow mechanics involved and of CFD methods generally I think that you are going to have serious difficulty making any progress at all with this project .

Anyway if you really want to have a go then you must start with an understanding of the fundamental mechanics of the gas flow .

See if you can describe to me what you think is going on physically in the complete flow path from source of flue gas to final dispersion in the atmosphere .

If you get anywhere near then I will be happy to discuss this problem further .
 

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