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Modeling UV Disinfection Using Integrated Computational Fluid Dynamics and Discrete Ordinates Radiation Models

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This paper describes a computational approach to simulate water disinfection in UV reactors. The approach uses an integrated platform for both the hydraulic and radiation models, which allows for a consistent representation of features and surfaces that not only impact flow patterns in the hydraulic model but also contribute to shadowing and wall reflections in the radiation model. A commercial reactor is simulated using this approach and results are compared to data. The use of integrated hydraulic and radiation models, which honors a consistent representation of the geometry and features within the UV reactor, can provide a more rigorous assessment of the true UV-intensity field and the resulting dose distribution. Methods are also presented to demonstrate how CFD-based models can be used to assess the performance of installed UV reactors that have different piping configurations than the validated configuration.
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Keywords: CFD modeling; UV disinfection; UVDGM; discrete ordinates

Document Type: Research Article

Publication date: 2009-01-01

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