As suggested above, you can try:

(1) The injection file. For that you’ll need to specify parameters such as

(( x  y  z  u  v  w  diameter  temperature  parcel-mass  mass  n-in-parcel  time  flow-time)  name)

in a raw ascii file. You can control the injection by start-time and stop-time.


(2) Alternatively, if during the pre-processing you prepare a mesh that distinguishes a fluid region where the parcels are to be injected. You can later use an “artificial” surface injection selecting the proper int_fluid region. Then, the parcels will “sprout” from the face centres of such region.