# plz help me???

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 September 27, 2010, 07:46 plz help me??? #1 Member   Join Date: Apr 2010 Posts: 54 Rep Power: 9 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

 September 28, 2010, 02:25 #2 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,210 Rep Power: 34 online help / section UDF / Chapter 8 / Section 8.2.1 (boundary condition) __________________ In memory of my friend Hervé: CFD engineer & freerider

 September 28, 2010, 14:39 #3 Member   Join Date: Apr 2010 Posts: 54 Rep Power: 9 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

 September 29, 2010, 01:25 #4 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,210 Rep Power: 34 I would say: online help / section UDF / Chapter 3 / Section 3.2.3 __________________ In memory of my friend Hervé: CFD engineer & freerider

 September 29, 2010, 10:13 #5 Member   Join Date: Apr 2010 Posts: 54 Rep Power: 9 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 SaHa

 September 30, 2010, 01:03 #6 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,210 Rep Power: 34 Are you able to start the calculation without error? If I correctly remember, you need the source file (but I am not sure) __________________ In memory of my friend Hervé: CFD engineer & freerider

 September 30, 2010, 02:49 #7 Member   Join Date: Apr 2010 Posts: 54 Rep Power: 9 yes ! i can start it !!!!!!!!

 September 30, 2010, 07:09 #8 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,210 Rep Power: 34 and no libudf folder? If no, then I don't know how to see the source code __________________ In memory of my friend Hervé: CFD engineer & freerider

September 30, 2010, 07:43
#9
New Member

Algates
Join Date: Sep 2010
Location: chennai
Posts: 13
Rep Power: 8
Quote:
 Originally Posted by saha2122 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........

September 30, 2010, 13:44
#10
Member

Join Date: Apr 2010
Posts: 54
Rep Power: 9
Quote:
 Originally Posted by alagesen 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!

October 3, 2010, 11:27
#11
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Join Date: Apr 2010
Posts: 54
Rep Power: 9
Quote:
 Originally Posted by -mAx- 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?

SaHa

 October 4, 2010, 02:08 #12 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,210 Rep Power: 34 libudf folder is .... a folder, not a file try to edit the other file (with wordpad or whatever) __________________ In memory of my friend Hervé: CFD engineer & freerider

 October 5, 2010, 06:21 #13 Member   Join Date: Apr 2010 Posts: 54 Rep Power: 9 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 ) )

 October 5, 2010, 06:47 #14 Super Moderator     Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,210 Rep Power: 34 this is a profile check online help __________________ In memory of my friend Hervé: CFD engineer & freerider

 October 10, 2010, 04:14 #15 Member   Join Date: Apr 2010 Posts: 54 Rep Power: 9 Really tanx , dear mAx !! ya I get it !!

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