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Old   September 27, 2010, 07:46
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hi everybody !!


first i solved my profile with fluent ! but in the outlet boundary condition i use pressure outlet = 0 !
but i know that its not true ! there is a pressure profile!! p=(Ro)*g*y

then i need to write a udf ! otherewise i should neglect gravity that this assumption is really fake!!!!!!

i have a problem with udf !!! i didnt write any udf before!
what should i do? is there any one to help me? how can i write UDF? is it difficult?


SaHa
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Old   September 28, 2010, 02:25
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online help / section UDF / Chapter 8 / Section 8.2.1 (boundary condition)
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Old   September 28, 2010, 14:39
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hi dear mAx !
the profile is 3D ! then should i write 3 udf ?pressure in x,y & z direction?

how i can find the parameters that used for define pressure in fluent code ?????

thancks
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Old   September 29, 2010, 01:25
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I would say: online help / section UDF / Chapter 3 / Section 3.2.3
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Old   September 29, 2010, 10:13
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hi dear mAx!

there is another question ! i get a case & dat files of fluent!
i find that one of its boundary condition is a udf !

is there any way that i can see this udf in fluent?[i havent the source], i wanna understand outlet bc!


im really thankful

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Old   September 30, 2010, 01:03
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Are you able to start the calculation without error?
If I correctly remember, you need the source file (but I am not sure)
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Old   September 30, 2010, 02:49
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yes ! i can start it !!!!!!!!
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Old   September 30, 2010, 07:09
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and no libudf folder?
If no, then I don't know how to see the source code
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Old   September 30, 2010, 07:43
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Quote:
Originally Posted by saha2122 View Post
hi everybody !!


first i solved my profile with fluent ! but in the outlet boundary condition i use pressure outlet = 0 !
but i know that its not true ! there is a pressure profile!! p=(Ro)*g*y

then i need to write a udf ! otherewise i should neglect gravity that this assumption is really fake!!!!!!

i have a problem with udf !!! i didnt write any udf before!
what should i do? is there any one to help me? how can i write UDF? is it difficult?


SaHa
hi saga,
i also face this type of probe...... my problem is solved with the help of GAMBIT........
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Old   September 30, 2010, 13:44
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Quote:
Originally Posted by alagesen View Post
hi saga,
i also face this type of probe...... my problem is solved with the help of GAMBIT........


hi alagesen! may you explain?
i really neeeeeeed! which part? plz!
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Old   October 3, 2010, 11:27
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Quote:
Originally Posted by -mAx- View Post
and no libudf folder?
If no, then I don't know how to see the source code

hi mAx!!!
i find a file in the folder that case & Dat file is saved! but type of this file is not clear !!!! in its properties the type of that is : File !!!

is it the libudf folder?


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Old   October 4, 2010, 02:08
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libudf folder is .... a folder, not a file
try to edit the other file (with wordpad or whatever)
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Old   October 5, 2010, 06:21
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i opened this file by notepad!!sth like this!!((pressure_outlet.1 point 795)
(x
41.599998
41.599998
41.599998
41.599998
41.599998
.
.
.
-13.328334
-12.861667
.
.
.
130806.4
230468.64
221447.75
214931.27
208154.23
201285.17
194381.27
187493.72
180635.39
173782.02
166932.14
160089.52
153296.95
146747.92
140355.22
130910.8
)
)
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Old   October 5, 2010, 06:47
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this is a profile
check online help
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Old   October 10, 2010, 04:14
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Really tanx , dear mAx !! ya I get it !!
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