Computational fluid dynamics (CFD) modeling of VUV/UV photoreactors for water treatment

Bagheri, Mehdi; Mohseni, Madjid

doi:10.1016/j.cej.2014.06.068

Cited by 60 publications

(35 citation statements)

References 28 publications

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“…CFD modeling of the VUV/UV AOP requires simultaneous resolution of hydrodynamics, fluence rate at both 185 nm and 254 nm wavelengths, and a comprehensive kinetic scheme [4]. Herein, for …”

Section: Model Developmentmentioning

confidence: 99%

“…The calculations of the fluence rate field for 185 nm and 254 nm photons were performed by solving the radiative transport equation (RTE) using non-gray discrete ordinate (DO) sub-model [4]. Furthermore, the reflection, refraction, and absorption of photons within the air gap (separating the lamp and the quartz sleeve region) and on the quartz sleeve were incorporated within the radiation sub-model.…”

Section: Model Developmentmentioning

confidence: 99%

“…Measured UV 254 transmittance of the samples was found to be 98% and this value was used in the simulations. More details about the utilized CFD sub-models, boundary conditions and numerical parameters can be found elsewhere [4]. The total execution time of each simulation was about 4 h on a 3.50 GHz AMD Phenom TM II X4 970 processor with 8 GB RAM.…”

Section: Model Developmentmentioning

confidence: 99%

“…Furthermore, the reflection, refraction, and absorption of photons within the air gap (separating the lamp and the quartz sleeve region) and on the quartz sleeve were incorporated within the radiation sub-model. Moreover, to account for the dependency of 185 nm water absorption coefficient on temperature (+0.05 cm −1 / • C), a linear function which corresponds to 1.4 cm −1 at 25 • C [12,25] was coupled to the radiative transfer equation [3,4]. Measured UV 254 transmittance of the samples was found to be 98% and this value was used in the simulations.…”

Section: Model Developmentmentioning

confidence: 99%

“…The air gap between the lamp envelope and the quartz sleeve was constrained to the range of 5-25 mm, to maintain lamp temperature in a suitable range, based on the lamp manufacturer's recommendation [26]. Furthermore, the minimum hydraulic diameter constraint for the photoreactor (10 mm) was selected based on the 185 nm optical path for Milli-Q water at approximately 21 • C [4]. Table 2 lists the values of the design parameters for the seven experiments along with the base geometry , which was utilized for the CFD model validation.…”

Section: Computer-aided Design Explorationmentioning

confidence: 99%

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A study of enhanced performance of VUV/UV process for the degradation of micropollutants from contaminated water

Bagheri

Mohseni

2015

Journal of Hazardous Materials

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“…CFD modeling of the VUV/UV AOP requires simultaneous resolution of hydrodynamics, fluence rate at both 185 nm and 254 nm wavelengths, and a comprehensive kinetic scheme [4]. Herein, for …”

Section: Model Developmentmentioning

confidence: 99%

Section: Model Developmentmentioning

confidence: 99%

Section: Model Developmentmentioning

confidence: 99%

Section: Model Developmentmentioning

confidence: 99%

Section: Computer-aided Design Explorationmentioning

confidence: 99%

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A study of enhanced performance of VUV/UV process for the degradation of micropollutants from contaminated water

Bagheri

Mohseni

2015

Journal of Hazardous Materials

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Radiation Models for Computational Fluid Dynamics Simulations of Photocatalytic Reactors

et al. 2023

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The literature on computational fluid dynamics (CFD) simulations applied to photocatalytic systems is reviewed. CFD simulations referring to three models, namely, P‐1, discrete ordinates (DO), and Monte Carlo (MC) models, for simulating radiation distribution in annular photoreactors are addressed and previous works using these models are reviewed. The cases are a three‐dimensional (3D) annular photoreactor and a two‐dimensional (2D) rectangular enclosure with black walls and the results are compared with the literature. The DO model was selected to solve the radiation transfer equation (RTE) as the most reliable model to fit the radiation distribution inside the reactor. The setting‐up of mesh, angular discretization, and boundary conditions for CFD simulation of photocatalytic reactors are addressed. When correctly set, the CFD models show an excellent agreement with the literature results.

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Main parameters influencing the design of photocatalytic reactors for wastewater treatment: a mini review

Sacco

Vaiano

Sannino

2020

J of Chemical Tech & Biotech

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The research in the heterogeneous photocatalysis to remove different types of pollutants in liquid phase has notably increased in the last years. The main objectives of the research dealing with photocatalysis were: (i) to shift the photoactivity of catalysts in the visible light range or to increase the degradation rate; (ii) the use of the artificial light sources (low pressure lamp, high pressure lamp, LEDs, and optical fibers) and solar light; (iii) photocatalysts recovering and deactivation; (iv) photoreactor configuration; (v) photodegradation of contaminants of emerging concern; and (vi) verification of induced effects from the photocatalytic treatment, such as the induction of bacterial resistance. Here, one of the main problems in the practical application of photocatalysis, which is the photoreactors scale‐up, is addressed with the use of mathematical modeling. In this perspective, this mini review reports a literature exam of the main parameters that are important to take into account for the design and the development of photoreactors for wastewater treatment, and through the use of computational fluid dynamics models (CFD). © 2020 Society of Chemical Industry

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Computational fluid dynamics (CFD) modeling of VUV/UV photoreactors for water treatment

Cited by 60 publications

References 28 publications

A study of enhanced performance of VUV/UV process for the degradation of micropollutants from contaminated water

A study of enhanced performance of VUV/UV process for the degradation of micropollutants from contaminated water

Radiation Models for Computational Fluid Dynamics Simulations of Photocatalytic Reactors

Main parameters influencing the design of photocatalytic reactors for wastewater treatment: a mini review

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