Njobuenwu, DO orcid.org/0000-0001-6606-1912 and Fairweather, M (2017) Large eddy simulation of inertial fiber deposition mechanisms in a vertical downward turbulent channel flow. AIChE Journal, 63 (4). pp. 1451-1465. ISSN 0001-1541
Abstract
The deposition pattern of elongated inertial fibers in a vertical downward turbulent channel flow is predicted using large eddy simulation and Lagrangian particle tracking. Three dominant fibers deposition mechanisms are observed, namely, diffusional deposition for small inertial fibers, free-flight deposition for large inertial fibers, and the interception mechanism for very elongated fibers. The fibers are found to exhibit orientation anisotropy at impact, which is strongly dependent on the fiber elongation. An increase in the fiber elongation increases the wall capture efficiency by the interception mechanism. The diffusional deposition mechanism is shown to dominate for fibers with large residence time, t⁺res, in the accumulation zone and small deposition velocities, v⁺z, while the free-flight mechanism governs deposition for fibers with small t⁺res and large v⁺z. This study describes how particles deposit on a surface and, ultimately for many practical applications, how such deposition may promote fouling.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2017 American Institute of Chemical Engineers. This is the peer reviewed version of the following article: Njobuenwu, D. O. and Fairweather, M. (2017), Large eddy simulation of inertial fiber deposition mechanisms in a vertical downward turbulent channel flow. AIChE J., 63: 1451–1465. doi:10.1002/aic.15664, which has been published in final form at https://doi.org/10.1002/aic.15664. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | large eddy simulation; fiber deposition; fiber orientation; fiber-wall interaction; turbulent flow |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemical & Process Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Mar 2017 12:11 |
Last Modified: | 31 Jan 2018 01:38 |
Published Version: | https://doi.org/10.1002/aic.15664 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/aic.15664 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:113899 |