[jinsong]

Hello ,i have some problem of using UDS or fluent internal species transport model
i want to model solute permeated a membrane,the model is 2D,unstedy , now i defined the membrane as wall,i should modify the species flux of every wall, note there is non reaction.
now,i am troubled in choicing what way to realized it .
firstly:can uds and internal species transport model used together???
second
(a)uds ----define many equations and product uds0,uds1...what these uds represent? in other hand ,define_uds macro cannot selected when i set boundary condition ,it only recognize profile macro ,i should define uds by profile macro?
(b) internal species transport ---i think that just can modify species by udf define_profile macro,but i think is difficut to obtain the wall species mass flux,because in the next time-step the exact solute mass fraction in wall don't know
I deeply understand this is a simple problem ? i am a newcomer,plz help me ,i need your help ,any advice will be greatly appreciated
i just modify the example of help documents ,It could't be betterthat someone have the right udf code ,thank you again.