Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Simulation of particle dispersion in a two‐dimensional mixing layer

Simulation of particle dispersion in a two‐dimensional mixing layer Particle dispersion in a two‐dimensional mixing layer is analyzed numerically by calculating the particle trajectories in a free shear layer simulated by discrete vortices. Important global and local flow quantities reported in experimental measurements are reasonably simulated. The particle dispersion results demonstrate that the extent of particle dispersion depends strongly on the Stokes number St, the ratio of particle aerodynamic response time to the characteristic time of the mixing layer flow. Particles with relatively small St values are dispersed at approximately the fluid dispersion rate. Particles with large St values are dispersed at a rate that is less than the fluid rate. Particles with intermediate values of St may get flung outside of the vortex structures in the mixing layer and therefore get dispersed at a higher rate than the fluid. This result is in agreement with some previous experiments in plane and axisymmetric jets. It is also found that a higher dispersion rate is associated with the particles introduced to the flow from the low‐speed side and from near the middle of the mixing layer. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aiche Journal Wiley

Simulation of particle dispersion in a two‐dimensional mixing layer

Chein, Reiyu; Chung, J. N.
Aiche Journal , Volume 34 (6) – Jun 1, 1988
Download PDF
9 pages

Loading next page...
 
/lp/wiley/simulation-of-particle-dispersion-in-a-two-dimensional-mixing-layer-XY2QUyPmWB

References (25)

Publisher
Wiley
Copyright
Copyright © 1988 American Institute of Chemical Engineers
ISSN
0001-1541
eISSN
1547-5905
DOI
10.1002/aic.690340607
Publisher site
See Article on Publisher Site

Abstract

Particle dispersion in a two‐dimensional mixing layer is analyzed numerically by calculating the particle trajectories in a free shear layer simulated by discrete vortices. Important global and local flow quantities reported in experimental measurements are reasonably simulated. The particle dispersion results demonstrate that the extent of particle dispersion depends strongly on the Stokes number St, the ratio of particle aerodynamic response time to the characteristic time of the mixing layer flow. Particles with relatively small St values are dispersed at approximately the fluid dispersion rate. Particles with large St values are dispersed at a rate that is less than the fluid rate. Particles with intermediate values of St may get flung outside of the vortex structures in the mixing layer and therefore get dispersed at a higher rate than the fluid. This result is in agreement with some previous experiments in plane and axisymmetric jets. It is also found that a higher dispersion rate is associated with the particles introduced to the flow from the low‐speed side and from near the middle of the mixing layer.

Journal

Aiche Journal – Wiley

Published: Jun 1, 1988

There are no references for this article.