plz help me???

saha2122 · September 27, 2010, 08:46

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

-mAx- · September 28, 2010, 03:25

online help / section UDF / Chapter 8 / Section 8.2.1 (boundary condition)

saha2122 · September 28, 2010, 15:39

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

-mAx- · September 29, 2010, 02:25

I would say: online help / section UDF / Chapter 3 / Section 3.2.3

saha2122 · September 29, 2010, 11:13

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

-mAx- · September 30, 2010, 02:03

Are you able to start the calculation without error?
If I correctly remember, you need the source file (but I am not sure)

saha2122 · September 30, 2010, 03:49

yes ! i can start it !!!!!!!!

-mAx- · September 30, 2010, 08:09

and no libudf folder?
If no, then I don't know how to see the source code

alagesen · September 30, 2010, 08:43

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........

saha2122 · September 30, 2010, 14:44

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!

saha2122 · October 3, 2010, 12:27

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

-mAx- · October 4, 2010, 03:08

libudf folder is .... a folder, not a file
try to edit the other file (with wordpad or whatever)

saha2122 · October 5, 2010, 07:21

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
)
)

-mAx- · October 5, 2010, 07:47

this is a profile
check online help

saha2122 · October 10, 2010, 05:14

Really tanx , dear mAx !! ya I get it !!

September 27, 2010, 08:46	plz help me???	#1
saha2122 Member Join Date: Apr 2010 Posts: 63 Rep Power: 16	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)gy 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, 03:25		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	online help / section UDF / Chapter 8 / Section 8.2.1 (boundary condition) __________________ In memory of my friend Hervé: CFD engineer & freerider

September 28, 2010, 15:39		#3
saha2122 Member Join Date: Apr 2010 Posts: 63 Rep Power: 16	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, 02:25		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	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, 11:13		#5
saha2122 Member Join Date: Apr 2010 Posts: 63 Rep Power: 16	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, 02:03		#6
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	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, 03:49		#7
saha2122 Member Join Date: Apr 2010 Posts: 63 Rep Power: 16	yes ! i can start it !!!!!!!!

September 30, 2010, 08:09		#8
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	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

October 4, 2010, 03:08		#12
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	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, 07:21		#13
saha2122 Member Join Date: Apr 2010 Posts: 63 Rep Power: 16	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, 07:47		#14
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	this is a profile check online help __________________ In memory of my friend Hervé: CFD engineer & freerider

October 10, 2010, 05:14		#15
saha2122 Member Join Date: Apr 2010 Posts: 63 Rep Power: 16	Really tanx , dear mAx !! ya I get it !!

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