Wolde, B, Mortimer, LF and Fairweather, M (2022) Effect of Stokes Number on Particle Deposition in Particle-Laden Turbulent Pipe Flows. In: Vad, J, (ed.) Proceedings of the Conference on Modelling Fluid Flow (CMFF'22). Conference on Modelling Fluid Flow (CMFF'22), 30 Aug - 02 Sep 2022, Budapest, Hungary. Department of Fluid Mechanics, Budapest University of Technology and Economics , pp. 144-151. ISBN 978-963-421-881-4
Abstract
The ability to predict particle dispersion, interaction and deposition in pipes is of value in improving the transport and process efficiency of high concentration particulate flows. In this work, the settling and deposition behaviour of suspensions of dense particles in a cylindrical pipe has been studied using direct numerical simulation coupled with Lagrangian particle tracking, with the influence of Stokes number on deposition examined. Fully developed particle-laden pipe flows are first driven to a steady state with shear Reynolds number, Reₓ =720, and particle Stokes numbers, St⁺ = 5.55 and 16.78, with the constant pressure gradient forcing term subsequently decreased until the onset of particle deposition. From the analysis performed, it can be concluded that particle deposition is sensitive to Stokes number. Particle dispersion function and mean displacement values are demonstrated to decrease considerably faster with time at the higher Stokes number. Particle migration towards the lower wall regions of the pipe also shows the formation of a bed for such particles, whilst over the same time period only dune-like structures are produced at the lower Stokes number. An analysis of the particle dynamics, carried out by examining probability density functions of particle velocities and positions, confirms these findings.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Keywords: | Particle flows, DNS, LPT, Stokes number, particle deposition |
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) |
Funding Information: | Funder Grant number EPSRC (Engineering and Physical Sciences Research Council) EP/S01019X/1 |
Depositing User: | Symplectic Publications |
Date Deposited: | 31 Jan 2023 14:53 |
Last Modified: | 31 Jan 2023 15:02 |
Published Version: | https://www.cmff.hu/?page=program |
Status: | Published |
Publisher: | Department of Fluid Mechanics, Budapest University of Technology and Economics |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:195831 |