Today's ANSYS: Analysis of Water Purification Treatment Using Ultraviolet Sterilization Equipment

Introduction to the analysis of water purification treatment using ultraviolet sterilization devices.

I would like to introduce information that highlights how CAE and CFD are beneficial to society, along with interesting application examples, primarily through articles from the information magazine "ADVANTAGE" published by ANSYS, Inc. and ANSYS Japan Co., Ltd. This time, I will present an analysis of water purification treatment using ultraviolet sterilization devices. ANSYS Fluent is equipped with numerous radiation models, and in this case, we will simulate using the Discrete Ordinates (DO) model and model various microorganisms with DPM (Discrete Phase Model), which is a somewhat unique example. When I first saw this case, I thought it might not fall within the realm of CFD (Computational Fluid Dynamics), but depending on how it is used, there seems to be potential for increased applications. We will incorporate the total amount of ultraviolet light (UV Dose) that bacteria receive while flowing through the ultraviolet sterilization device using a User Defined Function (UDF). In the drinking water supply that we use in our daily lives, ultraviolet irradiation devices are reportedly always used for sterilization (to kill chlorine-resistant bacteria such as Cryptosporidium). In other words, if we could improve the sterilization efficiency by even an average of 1% at the countless water purification plants across the country, it would result in a very significant effect.

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