[Mojtaba.a]

Hello all,

The topic title says it all!
What does the new "add" function object do?

In the user guide it says:

Add a list of fields.

Thanks for the comprehensive description, OpenFOAM Foundation!

Not even a single tutorial on this.

cd $FOAM_TUTORIALS
grep -r "type" | grep "add"

Boom, Nothing.

Stay healthy,
Mojtaba

[Daniel_Khazaei]

Hi,

The header description usually contains a simple example:

    The operation can be applied to any volume or surface fields generating a
    volume or surface scalar field.

    Example of function object specification:
    \verbatim
    Ttot
    {
        type            add;
        libs            ("libfieldFunctionObjects.so");
        fields          (T Tdelta);
        result          Ttot;
        executeControl  writeTime;
        writeControl    writeTime;
    }
    \endverbatim

Looking at the source code and using the above variable names, it creates a new field called "Ttotal" which is the result of "T + Tdelta".

Regards,
D. Khazaei

[Mojtaba.a]

Originally Posted by Daniel_Khazaei

Hi,

The header description usually contains a simple example:

    The operation can be applied to any volume or surface fields generating a
    volume or surface scalar field.

    Example of function object specification:
    \verbatim
    Ttot
    {
        type            add;
        libs            ("libfieldFunctionObjects.so");
        fields          (T Tdelta);
        result          Ttot;
        executeControl  writeTime;
        writeControl    writeTime;
    }
    \endverbatim

Looking at the source code and using the above variable names, it creates a new field called "Ttotal" which is the result of "T + Tdelta".

Regards,
D. Khazaei

Thank you Dan!

You are right, I forgot about the .H source files.

Cheers!

[zhangyan]

You need a configuration file in the system directory, like this:
https://github.com/OpenFOAM/OpenFOAM...ing/fields/add
change the <field names> to T T

and then:

postProcess -func add -fields '(T T)'

finally, you will get add(T,T) in the $time directory.

From my experience, this functionObject cannot use in the OpenFOAM compiled by Icc.

[Mojtaba.a]

Originally Posted by zhangyan

You need a configuration file in the system directory, like this:
https://github.com/OpenFOAM/OpenFOAM...ing/fields/add
change the <field names> to T T

and then:

postProcess -func add -fields '(T T)'

finally, you will get add(T,T) in the $time directory.

From my experience, this functionObject cannot use in the OpenFOAM compiled by Icc.

Thank you Yan, got it.