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CFD simulation of turbulence promoters in a water treatment reactor

conference contribution
posted on 06.12.2017, 00:00 by Saber Ahmed, Mohammad Rasul, R Brown, Nur Hassan
A new immobilized flat plate photocatalytic reactor for wastewater treatment has been proposed in this study to avoid subsequent catalyst removal from the treated water. The reactor consists of an inlet, reactive section where catalyst is coated and an outlet parts. In order to optimize the fluid mixing and reactor design, this study aims to investigate the influence of baffles and its arrangement on the flat plate reactor hydrodynamics using computational fluid dynamics (CFD) simulation. For simulation, an array of baffles acting as turbulence promoters is inserted in the reactive zone of the reactor. In this regard, results obtained from the simulation of a baffled- flat plate photoreactor hydrodynamics for different baffle positions, heights and intervals are presented utilizing RNG k-ε turbulence model. Under the conditions simulated, the qualitative flow features, such as the development and separation of boundary layers, vortex formation, the presence of high shear regions and recirculation zones, and the underlying mechanism are examined. The influence of various baffle sizes on the distribution of pollutant concentration is also highlighted. The results presented here indicate that the spanning of recirculation increases the degree of interfacial distortion with a larger interfacial area between fluids which results in substantial enhancement in fluid mixing. The simulation results suggest that the qualitative and quantitative properties of fluid dynamics in a baffled reactor can be obtained which provides valuable insight to fully understand the effect of baffles and its arrangements on the flow pattern, behaviour, and feature.

History

Start Page

1

End Page

11

Number of Pages

11

Start Date

23/05/2011

Finish Date

26/05/2011

Location

Boston, USA

Publisher

Nafems World Congress

Place of Publication

Boston, USA

Peer Reviewed

Yes

Open Access

No

External Author Affiliations

Queensland University of Technology

Era Eligible

Yes

Name of Conference

International Association of the Engineering Modelling, Analysis and Simulation Community. Congress