How to modify some results given by Fluent using udf

youhane · April 7, 2018, 12:59

Hello everybody,

I have modelled moisture within fluent using the Species model. The model works perfectly, but when I display the contours of relative humidity, sometimes it exceeds 100 % when the humid air passes next to a cold wall like in this picture:

That is normal, because Fluent use a mathematical formula to calculate the relative humidity, but what I want now is to ask if I can write an udf to modify the results of relative humidity as follows:

IF (RH > 100) --> Rh = 100.

Can anyone helps me with that please ?

AlexanderZ · April 8, 2018, 22:32

In Fluent GUI:
results -> graphics -> contours -> switch off auto range option -> put 100 in Max

best regards

youhane · April 9, 2018, 08:54

Quote:

Originally Posted by AlexanderZ

In Fluent GUI:
results -> graphics -> contours -> switch off auto range option -> put 100 in Max

best regards

I'm extremely grateful to you Mr. AlexanderZ. This is exactly what I want

April 7, 2018, 12:59	How to modify some results given by Fluent using udf	#1
youhane Member youhane kha Join Date: Sep 2017 Posts: 36 Rep Power: 9	Hello everybody, I have modelled moisture within fluent using the Species model. The model works perfectly, but when I display the contours of relative humidity, sometimes it exceeds 100 % when the humid air passes next to a cold wall like in this picture: That is normal, because Fluent use a mathematical formula to calculate the relative humidity, but what I want now is to ask if I can write an udf to modify the results of relative humidity as follows: IF (RH > 100) --> Rh = 100. Can anyone helps me with that please ?

April 8, 2018, 22:32		#2
AlexanderZ Senior Member Alexander Join Date: Apr 2013 Posts: 2,363 Rep Power: 34	In Fluent GUI: results -> graphics -> contours -> switch off auto range option -> put 100 in Max best regards youhane likes this.

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