Droplet-Turbulence Interactions Over a Wide Spectral Range.
Abstract
In the last year, the unsteady, three-dimensional, incompressible, viscous flow interactions between a single vortex tube advected by a uniform free stream and a spherical particle held fixed in space was investigated numerically for a range of particle Reynolds numbers between 20 and 100. Useful correlations of lift coefficient, moment coefficient, and drag coefficient with velocity fluctuation, Reynolds number, offset distance, and initial vortex size have been obtained and reported. A new mechanism based upon droplet lift has been suggested for the dispersion of sprays. Since the beginning of this year, the interactions between a pair of vortex tubes and a rigid sphere have been studied in order to generalize the findings from the previous investigation. Similar correlations for the force and moment coefficients have been found and are being reported. These correlations will be useful in predicting droplet trajectories. The investigation for the heat and mass transfer of a droplet interacting with vortex tubes is also under way. This should lead to useful correlations to predict droplet heating and vaporization in a flow with vortical fluctuations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1994
- Accession Number
- ADA299197
Entities
People
- I. Kim
- M. Masoudi
- S. E. Elghobashi
- William A. Sirignano
Organizations
- University of California, Irvine