We have an exciting announcement about badges coming in May 2025. Until then, we will temporarily stop issuing new badges for course completions and certifications. However, all completions will be recorded and fulfilled after May 2025.

Ansys Learning Forum › Forums › Discuss Simulation › Fluids › UDF for reinjecting particles › Reply To: UDF for reinjecting particles

September 25, 2024 at 8:48 am
Rob
Forum Moderator

If you have 100 parcels you'll have the last 5 be reinjected. But... with 1000 particles you'll have 905 reinjected. So a random number function may be better. 

Now, for the actual return part. If a parcel hits the outlet does it leave the domain before the UDF triggers? If you put a surface at a few cells into the domain (porous jump are really useful for this) does behaviour change?