my important question, UDF
 

hello guys

i have a very important question, and that is: how is it possible to add some models to fluent for some special simulation, for example i want to simulate a suction of a fluid inside a tube while the fluid is attached to the wall and needs some sort of time and pressure in advance to be unattached from the wall, also when the fluid moves in the tube, it has friction to the wall (both static friction when is not moved yet and dynamic friction)....
i have the anayltical model of capacitance, resistance, inductance model of fluid when the suction pressure is applied but i dont know how should i add it to fluent through UDF,

ur helsp are really appreciated
thank u

19 review but not answering.. even some clue may help me..
thank you in advance