Institutional Repository
Technical University of Crete
Technical University of Crete
EN
|
EL
| URI: | http://purl.tuc.gr/dl/dias/10F5BE2E-24C4-47BC-AC0C-4E051E7FA5D6 | ||
| Year | 1998 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
| License |
|
||
| Bibliographic Citation | M. Lazaridis , Y.Drossinos “Multilayer resuspension of small particles by turbulent flow," Aer. Science and Tech.,vol. 28,no.6, pp. 548-560 ,Jun.1998.doi:10.1080/02786829808965545 https://doi.org/ 10.1080/02786829808965545 | ||
| Appears in Collections |
A model for the resuspension of a multilayer deposit by turbulent flow is developed. The resuspension rate is obtained by solving a set of coupled, first-order kinetic equations. The multilayer resuspension rate depends explicitly on single-particle resuspension rates that are determined from a modified energy-transfer model. The surface-particle and particle-particle interaction potentials are calculated by a microscopic approach based on the integration of the Lennard-Jones intermolecular interaction potential. The effect of the surface roughness, which leads to a distribution of the adhesive forces, is considered, as well as the energy transfer from the fluctuating part of the turbulent flow to the particle. It is shown that for a geometrical arrangement of deposited particles with a co-ordination number of two (particles stacked on top of each other) particles from the top layers resuspend at lower friction velocities than particles adjacent to the surface. The predicted long-term resuspension rate decays algebraically with exposure time. Calculations are presented for a two-layer deposit of either SnO2 and Al2O3 particles on a stainless steel surface.
Copyright © DIAS 2013
