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Flow field investigation in a water treatment reactor using computational fluid dynamics

Ahmed, S., Brown, R.J., Rasul, M.G., & Duran, J.E. (2011) Flow field investigation in a water treatment reactor using computational fluid dynamics. In The ASME-JSME-KSME Joint Fluids Engineering Conference, 24-29 July 2011, Hamamatsu, Shizuoka, Japan.

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Abstract

The hydrodynamic behaviour of a novel flat plate photocatalytic reactor for water treatment is investigated using CFD code FLUENT. The reactor consists of a reactive section that features negligible pressure drop and uniform illumination of the photocatalyst to ensure enhanced photocatalytic efficiency. The numerical simulations allowed the identification of several design issues in the original reactor, which include extensive boundary layer separation near the photocatalyst support and regions of flow recirculation that render a significant portion of the reactive area. The simulations reveal that this issue could be addressed by selecting the appropriate inlet positions and configurations. This modification can cause minimal pressure drop across the reactive zone and achieves significant uniformization of the tested pollutant on the photocatalyst surface. The influence of roughness elements type has also been studied with a view to identify their role on the distribution of pollutant concentration on the photocatalyst surface. The results presented here indicate that the flow and pollutant concentration field strongly depend on the geometric parameters and flow conditions.

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ID Code: 42192
Item Type: Conference Paper
Keywords: Flow field, water treatment, computational fluid dynamics
ISBN: 9784888982078
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > PHYSICAL GEOGRAPHY AND ENVIRONMENTAL GEOSCIENCE (040600) > Surfacewater Hydrology (040608)
Australian and New Zealand Standard Research Classification > AGRICULTURAL AND VETERINARY SCIENCES (070000) > OTHER AGRICULTURAL AND VETERINARY SCIENCES (079900) > Agricultural Hydrology (Drainage Flooding Irrigation Quality etc) (079901)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > INTERDISCIPLINARY ENGINEERING (091500) > Turbulent Flows (091508)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Engineering Systems
Copyright Owner: Copyright 2011 [please consult the authors]
Deposited On: 22 May 2012 08:35
Last Modified: 22 May 2012 11:15

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