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Fluent in Background

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  • 1 Post By sunagra27
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  • 1 Post By sunagra27
  • 2 Post By AlexanderZ
  • 1 Post By sunagra27
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Old   July 6, 2019, 01:33
Default Fluent in Background
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Sunag R A
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Dear All,

I am running some simulations in fluent in a single 16 processor Computer. I want to know how to run simulation in background via the command line through cygwin interface in windows 10. I have some experience in running background simulation for Converge CFD software and not with Fluent.

I came through this article while checking for Fluent. https://www.me.psu.edu/cimbala/learn...background.htm. With respect to this, I have created case and data file for every frequent iterations using autosave option in fluent.

1. I want to know how to enable fluent in cygwin? If not cygwin, how to run fluent in background without graphical interface as said in above article. ( I haven't tried running in cmd).

2. What settings need to be done in fluent parallel setup before running the simulation? Is there any MPI setting to be done. ?

3. Is the journal file in the article correct? If not, how it should be written ?

Please help me out with this as it will save a lot of time and will also help me understand running ansys fluent in a computational way.



Thanks and Regards,

Sunag R A.
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Old   July 6, 2019, 06:46
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Svetlana Tkachenko
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in cmd I think fluent.exe may have '-g' option just like it does when I run it at a high performance computing facility on a Linux


the parallelization is done via the '-t' option again see https://www.sharcnet.ca/Software/Ans...up_option.html (check this for your version, this is for 16.2.3) and other examples like https://docs.pace.gatech.edu/software/fluent/


journal file looks correct
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Old   July 8, 2019, 00:49
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Alexander
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google fluent batch mode

you don't need to save case data files on each iteration (timestep) it's up to you.

best regards
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Old   July 8, 2019, 01:07
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Sunag R A
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Thank you very much for your reply. I understood the working method. But I am not able to start fluent in cmd or cygwin. It shows the following error:

'fluent' is not recognized as an internal or external command, operable program or batch file.

What I understood from this is that fluent in not installed in the cmd. How do I go with this? I tried searching for this, But i am unable to find a solution.

Once I get fluent working in cmd, I think I can run with commands given in the articles shared by you. Also, If you know the same working installation in cygwin, it would be helpful.

Thanks and Regards,

Sunag R A.
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Old   July 8, 2019, 01:42
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1. you need to define windows environment variable PATH = path to fluent
or
2. to to your working folder, save there case file manually, than you can execute not fluent, but this case file

best regards
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Old   July 8, 2019, 08:31
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Sunag R A
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Hi,

I tried putting fluent path folder to PATH of Environment variables. But, the commands are still not working. The below is the fluent path. I have installed Ansys in E drive so is this the correct path for fluent in Environment variables?

E:\Program Files\ANSYS Inc\v181\fluent\bin

Please help me out with this.

Thanks and Regards,

Sunag R A.
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Old   July 9, 2019, 00:43
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probably
Code:
E:\Program Files\ANSYS Inc\v181\fluent\ntbin\win64
don't forget to reboot computer

best regards
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Old   July 9, 2019, 01:48
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Sunag R A
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The environment variable is working perfectly even for Cygwin. Thank you very much for the support.

Regards,

Sunag R A.
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