Mahmoud, BH, Mortimer, LF, Fairweather, M et al. (3 more authors) (2019) Nanoparticle behaviour in multiphase turbulent channel flow. In: 29th European Symposium on Computer Aided Chemical Engineering. ESCAPE 2019, 16-19 Jun 2019 Elsevier , pp. 157-162. ISBN 978-0-12-818634-3
Abstract
The behaviour of dispersed nanoparticles within a turbulent wall-bounded flow is investigated, with the fluid phase properties chosen to represent a thermofluid flow typical of those present in solar thermal power plants. The continuous phase is modelled using direct numerical simulation with the open source spectral element-based solver, Nek5000, with predictions of a statistically steady turbulent channel flow at shear Reynolds number Reτ = 180 first obtained and validated. A Lagrangian particle tracking routine is subsequently implemented to simulate the dispersed phase, and is capable of accommodating one-, two-and four-way coupling between the fluid and discrete phases. In order to investigate the effect that the turbulence field has on the dispersion properties of the solid nano-particulate phase, mean fluid and particle velocities, and turbulence statistics, are obtained and presented. Particle mean velocities are observed to lag behind the fluid flow in the outer layer for all coupling methods. Particle streamwise velocity fluctuations are lower than those of the fluid in the bulk region of the flow, but are greater than the latter in the buffer layer, with the addition of particle agglomeration augmenting this effect. Particle concentrations in the near-wall region are observed to increase over time due to turbophoresis.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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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) The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Institute for Applied Geosciences (IAG) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 17 Jul 2019 11:25 |
Last Modified: | 17 Jul 2019 11:25 |
Published Version: | https://www.elsevier.com/books/29th-european-sympo... |
Status: | Published |
Publisher: | Elsevier |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:148615 |