Execute a Fortran program with Fluent

marye · May 10, 2010, 05:46

Hi,

I'd like to know how to execute a Fortran program with Fluent

Thank you!

DoHander · May 10, 2010, 09:16

Please give me more details if you want a more practical answer. Do you want to call a Fortran program from Fluent ? Or do you want to call Fluent from your Fortran program ?

What exactly are you trying to do ?

If you want to execute a Fortran code from Fluent you will use a UDF function in which you can use the C "system" command, I've never tried but it is your best guess. You must use a compiled UDF for having access at the entire C syntax.

Do

marye · May 10, 2010, 09:47

Hi,

First thank you for your answer!
Basically, I have an algorithm written in Fortran.
This algorithm has already been used to work with Marc Mentat and now I have to use it with Fluent.

But I don't know how to execute a Fortran program with Fluent and also I don't know how to call Fluent in my algorithm.
is it clearier?

DoHander · May 10, 2010, 11:30

I see two solutions:

1. Send data back and forth using text files, for example Fluent writes the data your Fortran algorithm needs in a file and starts the Fortran code, which will save his results in a new file. When the Fortran code has finished, Fluent reads the data file written by Fortran and so on ... This is a simple hack and not an elegant solution but it will usually work.

2. Reimplement your Fortran code in C as a UDF function, this will be directly accessible in Fluent. Probably this is the recommended solution for your problem. (If your Fortran code is Fortran 77 you can automatically translate parts of it using f2c - a program for Fortran to C conversion). I would recommend however a manual translation from Fortran to C.

In any case you will need a solid background of Fortran and C.

Do

marye · May 11, 2010, 04:32

ok, thanks, I will try...

maryam.s · December 1, 2012, 16:25

hi,
I want to call Fluent in my Fortran program,i need to run journal file of fluent for several times in fortran loop ,i use command system:

CALL SYSTEM("E:/program files/Fluent.Inc/ntbin/ntx86/fluent.exe 2ddp")
but program shows this error:
'E program' is not recognized as an internal or external command,operable program or batch file.
please help me

aoun · December 9, 2019, 19:53

Hi,

I hope that you have resolved your pb a long time ago,

here I'm confronted to the same pb? Please if you could gives the key if you have it,
thankful in advance

May 10, 2010, 05:46	Execute a Fortran program with Fluent	#1
marye New Member marie Join Date: May 2010 Posts: 21 Rep Power: 16	Hi, I'd like to know how to execute a Fortran program with Fluent Thank you!

May 10, 2010, 11:30		#4
DoHander Senior Member Join Date: Nov 2009 Posts: 411 Rep Power: 20	I see two solutions: 1. Send data back and forth using text files, for example Fluent writes the data your Fortran algorithm needs in a file and starts the Fortran code, which will save his results in a new file. When the Fortran code has finished, Fluent reads the data file written by Fortran and so on ... This is a simple hack and not an elegant solution but it will usually work. 2. Reimplement your Fortran code in C as a UDF function, this will be directly accessible in Fluent. Probably this is the recommended solution for your problem. (If your Fortran code is Fortran 77 you can automatically translate parts of it using f2c - a program for Fortran to C conversion). I would recommend however a manual translation from Fortran to C. In any case you will need a solid background of Fortran and C. Do reza0230 likes this.

December 1, 2012, 16:25	how execute fluent with fortran?	#6
maryam.s New Member maryam Join Date: Dec 2012 Location: isfahan Posts: 3 Rep Power: 13	hi, I want to call Fluent in my Fortran program,i need to run journal file of fluent for several times in fortran loop ,i use command system: CALL SYSTEM("E:/program files/Fluent.Inc/ntbin/ntx86/fluent.exe 2ddp") but program shows this error: 'E program' is not recognized as an internal or external command,operable program or batch file. please help me

December 9, 2019, 19:53	Hi maryam	#7
aoun New Member aounallah Join Date: Jan 2012 Posts: 7 Rep Power: 14	Hi, I hope that you have resolved your pb a long time ago, here I'm confronted to the same pb? Please if you could gives the key if you have it, thankful in advance

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Comparison between C/C++ and Fortran?	rick	Main CFD Forum	45	September 6, 2011 01:52
fortran program code	jangolobow	Main CFD Forum	0	July 11, 2009 06:28
Fluent connection with simulink by TCP/IP	Tanktruck	Fluent UDF and Scheme Programming	1	June 28, 2009 13:56
Absoft Pro Fortran 7.5 in Fluent 4.5	Thitikorn	FLUENT	0	July 5, 2002 07:41
Any numerical triple integration program is available in Fortran?	Radhakrishnan	Main CFD Forum	3	March 4, 1999 02:03

May 10, 2010, 09:16		#2
DoHander Senior Member Join Date: Nov 2009 Posts: 411 Rep Power: 20	Please give me more details if you want a more practical answer. Do you want to call a Fortran program from Fluent ? Or do you want to call Fluent from your Fortran program ? What exactly are you trying to do ? If you want to execute a Fortran code from Fluent you will use a UDF function in which you can use the C "system" command, I've never tried but it is your best guess. You must use a compiled UDF for having access at the entire C syntax. Do

May 10, 2010, 09:47		#3
marye New Member marie Join Date: May 2010 Posts: 21 Rep Power: 16	Hi, First thank you for your answer! Basically, I have an algorithm written in Fortran. This algorithm has already been used to work with Marc Mentat and now I have to use it with Fluent. But I don't know how to execute a Fortran program with Fluent and also I don't know how to call Fluent in my algorithm. is it clearier?

May 11, 2010, 04:32		#5
marye New Member marie Join Date: May 2010 Posts: 21 Rep Power: 16	ok, thanks, I will try...