Fluent DPM particle tracking shows multiple injections.
 

Hi all,

I am trying to model a person coughing by injecting water droplets at 22m/s for 0.5s. I set the start and stop time to be 0 and 0.5s. But in the results I see injections occurring for 0.5s but it reoccurs repeatedly over the course of 10s that I simulated. I used surface injection and a mass flowrate of 0.00034kg/s.

How can I keep the number of injections to just 1. Does "Number of diameters" option matter?

Thank you!