Ansys Assistant will be unavailable on the Learning Forum starting January 30. An upgraded version is coming soon. We apologize for any inconvenience and appreciate your patience. Stay tuned for updates.

Ansys Learning Forum Forums Discuss Simulation Fluids UDF for mass-flow-inlet Reply To: UDF for mass-flow-inlet

Rob
Forum Moderator

Boundary conditions are used for a surface effect, ie an inlet/outlet/wall and the like. If you need to add (or remove) material from a cell zone (volume effect) then you need a source term. What effect are you trying to replicate? Have you done some/most of the tutorials as those will give you a good idea of how the solver works. 

[bingo_chatbox]