[gauthamnarayan]

I request anybody experienced with droplet breakup simulation to kindly point out the possible errors in my simulation.

I am trying to simulate water droplet breakup in a swirler section. Water is supposed to be ejected drop by drop at the center of the swirling flow. The inlet is designed to produce a swirl flow at 40m/s tangential and axial velocity. The slip flow between the droplet and free stream is expected to produce a KH-instability and cause the droplet to deform and break.

I have tried to use the Unsteady Discrete Phase Method with the KHRT breakup model. However I do not observe any breakup, rather the droplet seems to be increasing in size, this is counter intuitive.

Also how do I visualize the droplet shape. The fluent post processor only displays particles as spheres. Please let me know if there are other ways to visualise the droplet.

Swirl flow
1.png

Particle track
2.png