[Ash Kot]

User has created one case file which will run for 3000 time-steps, now the problem is finished with use of all time-steps. However, at this time, user wants OpenFOAM software 'itself' to load next .cas file which is made of its own Independent settings from the first one, and run the file with its own settings, get initialized by itself and run for another 3000 time-steps, using specific way of coding, is it possible for OpenFOAM to program like this any type of application, lets say 2phaseEulerFoam, if yes, How to do this?

Kindly show me with some examples, if there is any tutorial with certain set of commands in it, please show me.

I asked same type of question in ANSYS FLUENT forum, but I have more faith on OpenFOAM, because its more robust, although coding makes it little bit difficult

Thank You,

Regards,

Ash Kot,
University of North Dakota, USA

[agustinvo]

Hi,

could you be more explicit? If you want to run different cases in different folders, what you can do is to create a terminal script, where you change your path, and you run other case.

[Ash Kot]

in fluent, if you have experience with it, we can write journal or Scheme language file (TUI commands), and can load the cases one by another. And even if each case is independent of each other fluent, understand those, and gives proper results.
Also in fluent we can write UDF functions regarding profiles of boundary conditions, based on flow time or time step, for example, changing mass flow rate based on flow time.

is there anything like that in OpenFOAM, if it is, can you direct me to the informational material.

[akidess]

Are you at all familiar with Linux and OpenFOAM?

[philippose]

Hi,
Good Morning.

Why dont you use a simple bash script to call each Simulation one after the other?

Example...:

#/bin/bash

simpleFoam -case <full path to case -1>
simpleFoam -case <full path to case - 2>


etc...etc...

This way, you can simulate one case after the other...

However, the better way to do this would be to use some kind of load balancing System like "HTCondor".. then you can just submit multiple cases to the Queue, and they will be simulated either simultaneously, or one after the other depending on what resources the Computer has available.

Regards,
Philippose

[agustinvo]

Originally Posted by agustinvo

Hi,

could you be more explicit? If you want to run different cases in different folders, what you can do is to create a terminal script, where you change your path, and you run other case.

Originally Posted by philippose

Hi,
Good Morning.

Why dont you use a simple bash script to call each Simulation one after the other?

Example...:

#/bin/bash

simpleFoam -case <full path to case -1>
simpleFoam -case <full path to case - 2>


etc...etc...

This way, you can simulate one case after the other...

However, the better way to do this would be to use some kind of load balancing System like "HTCondor".. then you can just submit multiple cases to the Queue, and they will be simulated either simultaneously, or one after the other depending on what resources the Computer has available.

Regards,
Philippose

Yes, this is what I was thinking... I am not an expert in bash, but for sure there are a lot of examples on the internet to do this.

The main difference between Fluent and OpenFOAM about this, is that Fluent uses its own terminal, so you can do as you say (open this case and so on), but OpenFOAM uses the Linux terminal so to use it as you want you need to play with the terminal.

It does not seems a bad idea that HTCondor you talk about, Philippose, specially for parametric studies. I will take a look!

[Zeppo]

Originally Posted by Ash Kot

User has created one case file which will run for 3000 time-steps, now the problem is finished with use of all time-steps. However, at this time, user wants OpenFOAM software 'itself' to load next .cas file which is made of its own Independent settings from the first one, and run the file with its own settings, get initialized by itself and run for another 3000 time-steps, using specific way of coding, is it possible for OpenFOAM to program like this any type of application, lets say 2phaseEulerFoam, if yes, How to do this?

There're even a dedicated function object:
"timeActivatedFileUpdate. Performs a file copy/replacement once a specified time has been reached.
Example usage to update the fvSolution dictionary at various times throughout the calculation:"

fileUpdate1
{
    type              timeActivatedFileUpdate;
    libs ("libutilityFunctionObjects.so");
    writeControl     timeStep;
    writeInterval    1;
    fileToUpdate      "$FOAM_CASE/system/fvSolution";
    timeVsFile
    (
        (-1 "$FOAM_CASE/system/fvSolution.0")
        (0.10 "$FOAM_CASE/system/fvSolution.10")
        (0.20 "$FOAM_CASE/system/fvSolution.20")
        (0.35 "$FOAM_CASE/system/fvSolution.35")
    );
}

[Ash Kot]

Originally Posted by akidess

Are you at all familiar with Linux and OpenFOAM?

Not much but trying to leave fluent like proprietary software and trying to get full understanding of open source softwares, like OpenFOAM


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