Using the DEM-CFD method to predict Brownian particle deposition in a constricted tube

Chaumeil, Florian and Crapper, Martin (2014) Using the DEM-CFD method to predict Brownian particle deposition in a constricted tube. Particuology, 15. pp. 94-106. ISSN 1674 2001

Chaumeil and Crapper Particuology 2014 Postprint.pdf - Accepted Version

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Modelling of the agglomeration and deposition on a constricted tube collector of colloidal size particles immersed in a liquid is investigated using the discrete element method (DEM). The ability of this method to represent surface interactions allows the simulation of agglomeration and deposition at the particle scale. The numerical model adopts a mechanistic approach to represent the forces involved in colloidal suspensions by including near-wall drag retardation, surface interaction and Brownian forces. The model is implemented using the commercially available DEM package EDEM 2.3®, so that results can be replicated in a standard and user-friendly framework. The effects of various particle-to-collector size ratios, inlet fluid flow-rates and particle concentrations are examined and it is found that deposition efficiency is strongly dependent on the inter-relation of these parameters. Particle deposition and re-suspension mechanisms have been identified and analyzed thanks to EDEM's post processing capability. One-way coupling with computational fluid dynamics (CFD) is considered and results are compared with a two-way coupling between EDEM 2.3® and FLUENT 12.1®. It is found that two-way coupling requires circa 500% more time than one-way coupling for similar results.

Item Type: Article
Uncontrolled Keywords: Discrete element method; DEM; Colloids; Agglomeration; Deposition; Simulation
Subjects: H200 Civil Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Becky Skoyles
Date Deposited: 03 Jun 2016 13:55
Last Modified: 01 Aug 2021 01:32

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