Abstract
A numerical study of the transient deformation and drag properties of impulsively started decelerating drops in axisymmetric flows is conducted. The incompressible Navier-Stokes equations coupled with the volume of fraction method are solved. The differences in the deformation and drag characteristics between the accelerating and decelerating drops are elucidated. The Weber number We has a significant influence on the drag properties of the round drops; however, the effect of the Ohnesorge number Oh is small. A dynamic droplet drag model is provided based on the computational fluid dynamics results to predict the drag coefficient of a decelerating drop. In addition, the flow of liquid drops past an RAE2822 airfoil is considered, and its drag is evaluated using the drag model.
| Original language | English |
|---|---|
| Pages (from-to) | 490-505 |
| Number of pages | 16 |
| Journal | AIAA Journal |
| Volume | 54 |
| Issue number | 2 |
| DOIs | |
| State | Published - 2016 |
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