Computational Simulation of Droplet Collision Dynamics
Final rept. 1 Jun 1996-31 May 1999
PRINCETON UNIV NJ DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
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Droplet collision was simulated using two computational approaches, namely front tracking and molecular dynamics. By using the front tracking technique, the collision sequence in different collision regimes was simulated, the history of pressure and viscous dissipation within the droplet was spatially resolved, and the energy partition among the various modes was identified. By using the molecular dynamics method, bouncing and coalescence were successfully simulated for the first time without the artificial manipulation of the inter-droplet gaseous film. Several flame dynamics problems were also simulated, including flame-vortex interaction and flamefront instability in large-scale flows. In particular, it was found that wrinkling of a flame surface in the presence of a vortex is very much influenced by the Landau-Darrieus instability instead of the motion of the vortex itself, and that the wrinkling due to large-scale flows can suppress the formation of small-scale instabilities.
- Computer Programming and Software
- Fluid Mechanics