Hello all, does anybody know how can I create journal files in Fluent?? I don't think that i could understand enough from the manual. I have already a case saved.How could i run it without using GUI? Any suggestions are highly appreciated

A journal is just a collection of TUI commands. If all you're trying to do is read a case, iterate it and save it, then it's a relatively simple journal:

; read the case... rc is a shortcut for /file/read-case rc {filename}.cas ; read the data rd {filename}.dat ; iterate, replace #### with number of iterations desired it #### ; write case wc {results filename}.cas ; write data wd {results filename}.dat

Instead of writing the case and data in multiple lines, I've seen people use wcd {results filename}.cas You can do many other things as well. You can have fluent overwrite the old filenames (instead of creating a {results filename} file). I recommend doing this by setting the batch options ; add this before reading the case ; set batch options /file/set-batch-options no ; confirm file overwrite yes/no yes ; exit on error yes/no no ; hide questions yes/no Instead of reading in a data file, you can initialize the flow: ; initialize the flow s i init You can even do fmg initialization (in Fluent 6.2 at least): s i fmg y

I used a lot of shortcuts above. Any TUI can be reached in two ways. You can type out the full path to the command:

/solve/initialize/initialize-flow

Or you can use shortcuts. A shortcut is any unique set of characters that represent the subfolder and/or command you are trying to reach. For example, the initialize-flow command above can be reached like:

s i i

Both solve and surface are top level menus that begin with s, but solve comes first (alphabetically), so 's' is assumed to mean the solve menu. Same thing with the first i in the command, which could have meant initialize or iterate. Unfortunately, there's no list of all the shortcuts available (like rc, or wd... only way you can know about those is to see someone else use them).

I recommend thinking through what commands you want the journal to run. Then open a Fluent window and type in the TUI for that command. Sometimes Fluent will need a response after a command (like the batch option command I showed) and the returns may be important, including blank returns for accepting the default values.

If there's something specific that you're trying to accomplish, feel free to e-mail me and I can try and help.

Hope this helps getting you started at least, and good luck, Jason

dear sir the journal file is like a recorder to record all you done in solving a certain problem for example: flow over airfoil after running this case at a certain angle of attack you need to change only the angle of attack or any other parameteres, to do that in very short effort and sure of the same other conditions fixed. do the following 1-file-->write-->journal and name the journal file (file name1.jou) 2-adjust all the parameteres in your case starting from read the mesh file until plotting the results.... 3-file-->write-->stop journal 4-for new case open the journal file using any text editor and change the parameters you need and then save it with a new name (file name2.jou) 5-file-->read-->journal u will see all the steps u already done using GUI done quickely on the screen and the solution run

try what i already explain for a simple case (with minimum orders ) first and u will like to do that in all cases

also the orders that Jason mention it may be useful for u without journal file

have a Good Luck

Khairy-Egypt

Thank you guys for your response.I really appreciate it! it helped me understand how the whole thing works. Thanks a lot!

Anyone can give a brief introduction about how to write a transient journal script?

Yizhou

i have a doc about it, drop me an email so that i can mail you as soon as i reach my town.

[Azy]

Originally Posted by zxaar
;126358

i have a doc about it, drop me an email so that i can mail you as soon as i reach my town.

Could you send this doc. to me as well. there is nothing about it in the manual
Thanks

[eneja]

Is it still possible to get this doc?
Thanks

[Deensquare]

Originally Posted by zxaar
;126358

i have a doc about it, drop me an email so that i can mail you as soon as i reach my town.

can i still have the doc pls

[azna]

Hi I'm looking for journal file for transient Fluent, Does anybody has an sample or document for it ?
Thanks

[Heat80]

Here is very simple journal file for transient case:
--------------------------------------
rc your_case_file_name.cas
rd your_data_file_name.dat
solve dual-time-iterate 4000 20
------------------------------------------
where: 4000 means your case is going to run for 4000 time step.
20 max number of iteration per each time step.

Thanks
Younis

[azna]

Dear Younis thanks,

I was wondering that do you have any example for submitting job as "PBS Job Chains and Dependencies"

regards,

Originally Posted by Heat80

Here is very simple journal file for transient case:
--------------------------------------
rc your_case_file_name.cas
rd your_data_file_name.dat
solve dual-time-iterate 4000 20
------------------------------------------
where: 4000 means your case is going to run for 4000 time step.
20 max number of iteration per each time step.

Thanks
Younis

[manahara]

Originally Posted by khairy Elsayed
;126194

dear sir the journal file is like a recorder to record all you done in solving a certain problem for example: flow over airfoil after running this case at a certain angle of attack you need to change only the angle of attack or any other parameteres, to do that in very short effort and sure of the same other conditions fixed. do the following 1-file-->write-->journal and name the journal file (file name1.jou) 2-adjust all the parameteres in your case starting from read the mesh file until plotting the results.... 3-file-->write-->stop journal 4-for new case open the journal file using any text editor and change the parameters you need and then save it with a new name (file name2.jou) 5-file-->read-->journal u will see all the steps u already done using GUI done quickely on the screen and the solution run

try what i already explain for a simple case (with minimum orders ) first and u will like to do that in all cases

also the orders that Jason mention it may be useful for u without journal file

have a Good Luck

Khairy-Egypt

Khairy you are the best!!

[shukoof]

how to add it save date after 1000 itteration?

[brunoc]

Do you want to run for 1000 iterations and then save? Or do you want to auto-save backups every 1000 iterations?

[mehdebr]

Originally Posted by brunoc

Do you want to run for 1000 iterations and then save? Or do you want to auto-save backups every 1000 iterations?

I want to save the result of the fluent run automatically in each for example 100 iterations.
what should I add to my journal file?
let's assume that I have the following journal file:

rc casename.cas
rd dataname.dat
solve dual-time-iterate 100000 50

[mrswordf1sh]

Originally Posted by khairy Elsayed
;126194

dear sir the journal file is like a recorder to record all you done in solving a certain problem for example: flow over airfoil after running this case at a certain angle of attack you need to change only the angle of attack or any other parameteres, to do that in very short effort and sure of the same other conditions fixed. do the following 1-file-->write-->journal and name the journal file (file name1.jou) 2-adjust all the parameteres in your case starting from read the mesh file until plotting the results.... 3-file-->write-->stop journal 4-for new case open the journal file using any text editor and change the parameters you need and then save it with a new name (file name2.jou) 5-file-->read-->journal u will see all the steps u already done using GUI done quickely on the screen and the solution run

try what i already explain for a simple case (with minimum orders ) first and u will like to do that in all cases

also the orders that Jason mention it may be useful for u without journal file

have a Good Luck

Khairy-Egypt

THanks a lot, you are awesome

[FluidWarrior]

Hi,
maybe this is helpful for you:
https://www.researchgate.net/publica...t_and_ParaVIEW

Have a nice day!

[rishirl]

Hi
I need the journal file for transient case with variable time step. Can anyone help me with this?

[johnkh]

I've found this very helpful page in a blog somewhere, credits to the author http://ansysofkemin.blogspot.com/201...ui-fluent.html