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how to output hi in OpenFoam

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Old   October 24, 2011, 04:56
Default how to output hi in OpenFoam
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yi Wang
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hello,everyone

In Openfoam, How to output speices specific enthalpy hi?
Any comments, please
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Old   October 24, 2011, 12:12
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Marco A. Turcios
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Read this section of the manual on run time code compilation:

http://www.openfoam.com/version2.0.0...me-control.php

In the source code for a particular solver you specify which fields to write out when they are created, usually createFields.C. If you want the specific enthalpy of each species, you need to execute code at run-time that will write out the h field for every field i. Most likely you need to create a reference to each field with its own name (in a forAll loop) and then execute an hi.write(). You'll have to specify an interval at which these fields will be written.
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Old   October 27, 2011, 04:31
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Quote:
Originally Posted by mturcios777 View Post
Read this section of the manual on run time code compilation:

http://www.openfoam.com/version2.0.0...me-control.php

In the source code for a particular solver you specify which fields to write out when they are created, usually createFields.C. If you want the specific enthalpy of each species, you need to execute code at run-time that will write out the h field for every field i. Most likely you need to create a reference to each field with its own name (in a forAll loop) and then execute an hi.write(). You'll have to specify an interval at which these fields will be written.
mturcios777:

Thank you very much! would you like to show me an example?
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Old   October 27, 2011, 13:57
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Of the top of my head, it seems like you'll need something like this:

Code:
label specName;

foAll(h,speci)
{
    specName = h[i].name();

    volScalarField hiTemp
    (
    IOobject
    (
        specName,
        runTime.timeName(),
        mesh,
        IOobject::NO_READ,
        IOobject::AUTO_WRITE
        ),
    h[i]
    );

    hiTemp.write();
}
Not being super familiar with runTime post-processing, I'm not exactly sure where this should be located, but it seems like you should try adapt the fourth example on the OpenFOAM page I linked earlier (the one that calculated the average pressure). Change the outputControl to something that will write at the writeInterval (don't know what the option is, it may well be writeInterval). Good luck

Last edited by mturcios777; October 27, 2011 at 14:01. Reason: functionObjects comment
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Old   October 28, 2011, 04:16
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Thanks a lot. I will try
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Old   January 31, 2012, 06:02
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Do you have find h_i of the species? And how? Thanks.
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