NUST Institutions Library Catalogue

An upgraded model was developed by employing a combination of Eulerian-Eulerian two-phase
approach and user defined function (UDF) to solve the water-ozone flow and interaction in an
ozone contactor using computational fluid dynamics (CFD). Moreover, geometric configuration
of the contactor was optimized to improve the performance of the contactor. As indicators
Residence Time Distribution (RTD) and Dissolved Ozone Concentration (C) were used for
single phase and two-phase CFD models. Validation of experimental data already available in
the literature was done for RTD and then its impact on C was studied using different contactor
configurations. From simulations it was evident that optimizing structural configurations can
greatly reduce the size of recirculation zones, dead zones and short-circuiting. As a result, an
increase of 71.6% was observed in dissolved ozone concentration in the geometry containing
double-sided horizontal baffles.