Njobuenwu, DO orcid.org/0000-0001-6606-1912 and Fairweather, M (2016) Large Eddy Simulation of Particle-Particle Interactions in Turbulent Flow: Collision, Agglomeration and Break-Up Events. In: Proceedings of the 11th International ERCOFTAC Symposium on Engineering Turbulence Modelling and Measurements. ETMM11, 21-23 Sep 2016, Palermo, Italy. .
Abstract
A numerical study of particle-particle interactions in a turbulent flow is performed using an Eulerian-Lagrangian particle tracking code with a
hard-sphere collision model extended to take into account coalescence between the colliding particles and break-up of agglomerates. The effect of the agglomerate fractal dimension on the break-up events, and eventually on collision and agglomeration, is presented. The computational domain was seeded with primary particles (calcite, a nuclear waste simulant) of size 60 micron and allowed to run until steady state before the particle-particle interactions were activated. Break-up events reduce as the agglomerate fractal dimension (df = 2.0, 2.5, 2.8 and 3.0) increases, and with no break-up event as the control, the effect of break-up on particle-particle interactions is presented. The results show an increase in the number of collisions, and the number of collisions leading to agglomeration, with a decrease in the agglomeration rate and agglomerate size with increasing hydrodynamic stress, as a consequence of break-up.
Metadata
Authors/Creators: |
|
||||
---|---|---|---|---|---|
Dates: |
|
||||
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: |
|
||||
Depositing User: | Symplectic Publications | ||||
Date Deposited: | 10 Oct 2016 11:26 | ||||
Last Modified: | 05 Nov 2019 10:25 | ||||
Status: | Published |