Transient DPM-About Start Stop times

Julie

Hi,

For the Transient simulations, for DPM, I realised that when I turned on the "interaction with continuous phase", I saw there is Start and stop times in the injection panels.

If I specify any time in Start and stop that is not 0,example, start=2sec and stop=4sec, is it true that I must also input a value for the mass flow rate? Or else, onlie one injection will be made? Because I put some values for the start and stop times, but I did not put any values for flow rate, and I could only see one jection being made at start=2.

If I input start and stop times, how do Fluent calculate how many injection should it make in during the time interval? I'm not too sure of how the start and stop time works.

I'm tryin to model someone coughing continuously for about 2 seconds...which coughs about 3-4 times during this period.