Details

Autor(en) / Beteiligte

• Moghaddami, Mostafa
• Jalali, Alireza
• Behnamghader, Pooyan
• Raisee, Mehrdad

Titel

Effect of vortex shedding on the performance of cross-flow UV-H2O2 photoreactors

Ist Teil von

• Chemical engineering and processing, 2021-09, Vol.166, p.108471, Article 108471

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •An unsteady flow simulation was performed for UV-H2O2 cross-flow photoreactors.•The performance of contaminant removal was evaluated for different blockage ratios.•The frequency of vortex shedding changes with blockage ratio.•The flow behind the cylindrical lamp becomes steady for large blockage ratios.•The extra mixing occurs due to vortex shedding enhances contaminant removal. In this paper, the effect of vortex shedding on the performance of cross-flow UV-H2O2 photoreactors is numerically investigated. The photoreactors are used for the degradation of two organophosphate esters, namely tributyl phosphate (TBP) and tri (2- chloroethtyl) phosphate (TCEP). An unsteady model is developed in the OpenFOAM code, which is an open-source finite volume solver. Three different photoreactors with blockage ratios of 0.55, 0.275 and 0.1375 are simulated. Parameters relevant to the unsteady behavior of the flow are calculated in each case. Also, the effect of vortex shedding on the performance of each photoreactor is investigated. It is found that the unsteadiness of the flow increases by decreasing the blockage ratio. Our results reveal that by decreasing the blockage ratio in a photoreactor, its performance increases significantly. More specifically, the photoreactor with blockage ratio of 0.1375 enhances the TBP contaminant removal by 40 percent compared to the photoreactor with blockage ratio of 0.55. [Display omitted]