[nadezhda]

Hello!
I want to calculate HRR during FireFoam simulation.
I try this code in controlDict (found in tutorials):

functions
{
    HRR
    {
        type            cellSource;
        functionObjectLibs ("libfieldFunctionObjects.so");
        enabled         true;
        outputControl   outputTime;  //outputTime;
        outputInterval  1;
        log             false;     
        valueOutput     false;
        source          all;       //cellZone;
        sourceName      c0;
        operation       volIntegrate;
        fields
        (
            dQ
        );
    };    
}

But it doesn't work. Then I run postProcess I get:

--> FOAM Warning : 
    From function bool Foam::functionObjectList::read()
    in file db/functionObjects/functionObjectList/functionObjectList.C at line 644
    Caught FatalError 
--> FOAM FATAL ERROR: 
Unknown function type cellSource

What's wrong with it and how can I calc HRR?

Also I can't find where heat of combustion is specified in fireFoam. Please help me.

[Roman1]

Hello. Next code works fine with my cases. It differs a little from yours. One thing, the result, i.e. HRR depends on the cell size. Try the same case with different cell size and you will see. At my mind this is not a great deal problem.
As for HRR, please find here the tutorial for reactingFoam solver. FireFoam works similar.
functions
(

volInts
{
type cellSource;
functionObjectLibs ("libfieldFunctionObjects.so");
enabled true;
outputControl timeStep; //outputTime;
outputInterval 1;
log true; //true;
valueOutput false;
source all; //cellZone;
sourceName c0;
operation volIntegrate;
fields
(
dQ
);

}

[nadezhda]

Thank you Roman1, I'll try your code!

[FlyingCat]

Hello,

I am interested in having HRR because I realize that fireFoam is very dependent of mesh size.

With your code Roman, I have the same problem: Unknown function type cellSource

I am not sure you can use it. If someone has a solution.

Thanks.

[FlyingCat]

To have the HRR function of time, you can add:

    HRR
    {
        type            volRegion;
        functionObjectLibs ("libfieldFunctionObjects.so");
        enabled         true;
	writeControl    timeStep;
	writeInterval   1;
	writeFields     false;
	log             true;
	regionType      all;
        operation       volIntegrate;
        fields
        (
            dQ
        );
    }

in your controlDict file.

[FlyingCat]

With a sum is better:

    HRR
    {
        type            volRegion;
        functionObjectLibs ("libfieldFunctionObjects.so");
        enabled         true;
	writeControl    timeStep;
	writeInterval   1;
	writeFields     false;
	log             true;
	regionType      all;
        operation       sum;
        fields
        (
            dQ
        );
    }

[luca1992]

Hello, i am looking for answers in a lot of places for a long time, can i ask you some things about fireFoam? I'm trying to simulate a fire in a closed place, but I have doubts.
Thank you, greetings, Luca.

[Roman1]

I could help if I can

[luca1992]

Hi, thanks very much for the reply, I also asked for help in another forum discussion (both in "fireFOAM: reactions file setup" and in "HRR in fireFoam") and now I do not know what to do. I did not know if anyone answered me since July 30 I had created a post but no one answered me and so I was not very optimistic and so I had written on both posts that had the latest message in 2017, now I could write my question on both of the discussions, but maybe it would be better to unify them, do you know how to do it? Maybe it's better if I publicize my question in my previous post "Simulating fire in a tunnel" so if you can answer me there. Thank you both (Roman1 and ashish.vinayak) let me know if it is all right for you.