Rob
Ansys Employee

Weird, I posted a lot more text. 

Injection will be 0 < t < 3600 or so, ie bubbles are injected every particle time step for a continuous injection. 

For a surface injection you get one parcel stream per facet. The parcel speed is based on the values you put into the panel. The parcel mass is injection mass divided by the number of parcel streams. Leave the parcel definitions alone until you understand what the changes will do.