Njobuenwu, DO and Fairweather, M (2014) Effect of shape on inertial particle dynamics in a channel flow. Flow Turbulence and Combustion, 92 (1-2). 83 - 101. ISSN 1386-6184
Abstract
Particle dynamics in a channel flow are investigated using large eddy simulation and a Lagrangian particle tracking technique. Following validation of single-phase flow predictions against DNS results, fluid velocities are subsequently used to study the behaviour of particles of differing shape assuming one-way coupling between the fluid and the particles. The influence of shape- and orientation-dependent drag and lift forces on both the translational and rotational motion of the particles is accounted for to ensure accurate representation of the flow dynamics of non-spherical particles. The size of the particles studied was obtained based on an equivalent-volume sphere, and differing shapes were model led using super-quadratic ellipsoid forms by varying their aspect ratio, with their orientation predicted using the incidence angle between the particle relative velocity and the particle principal axis. Results are presented for spherical, needle- and platelet-like particles at a number of different boundary layer locations along the wall-normal direction within the channel. The time evolution and probability density function of selected particle translational and rotational properties show a clear distinction between the behaviour of the various particles types, and indicate the significance of particle shape when modelling many practically relevant flows.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2014, Springer. This is an author produced version of a paper published in Flow Turbulence and Combustion. Uploaded in accordance with the publisher's self-archiving policy The final publication is available at Springer via http://dx.doi.org/10.1007/s10494-013-9503-7 |
Keywords: | Large eddy simulation; Particle; Shape; Orientation; Quaternion |
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) > Institute for Particle Science and Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 07 Jul 2014 11:36 |
Last Modified: | 03 May 2015 21:47 |
Published Version: | http://dx.doi.org/10.1007/s10494-013-9503-7 |
Status: | Published |
Publisher: | Springer |
Identification Number: | 10.1007/s10494-013-9503-7 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:79574 |