The performance of UV reactor which is used in water treatment is strongly affected by UV fluence rate
and water flow in the UV reactor. Therefore, CFD tools are widely used in designing process of UV
reactors. This paper describes the development of a computational fluid dynamics (CFD) methodology that
can be used to calculate the performance of open channel type UV reactor used in wastewater treatment
plant. All computations were performed using commercial CFD code, CFX, by considering three dimensional,
steady, incompressible flow. The Eulerian-Eulerian multi-phase method were used to capture the water-air
interface. The MSSS model, provided by UVCalc3D, was used to calculate the UV intensity field. The
numerical predictions and calculated UV Dose were compared with experimental dataset to validate the CFD
methodology. The reactor performance based on MS2 log reduction was well matched with measurements
within 6%.
