[b.simpson]

Hi all,

I am trying to set up an Age of Air function object in OpenFOAM 8. I am running buoyantSimpleFoam in Ubuntu 18.04.

I have tried implementing a function object from older threads (mainly Age of air with function object).

My controlDict code is:

AoA
	{
		type    scalarTransport;
		libs 	("libutilityFunctionObjects.so");
		enabled true;
		writeControl writeTime;
		log yes;
		nCorr 1;

		field AoA;
		active          true;
		autoSchemes     false;
		resetOnStartUp false;
		DT              1e-5;

		fvOptions
		{
			IncrementTime
			{
				type            semiImplicitSource;
				active          true;
				selectionMode all;
				volumeMode  specific;
				sources
				{
					injectionRateSuSp
					{
						AoA       (1 0);
					}
				}
			}
		}
	}

I am now getting the following error:

Selecting finite volume options model type semiImplicitSource
    Source: IncrementTime
    - selecting all cells
    - selected 1119784 cell(s) with volume 158.70844
[0] 
[0] 
[0] --> FOAM FATAL ERROR: 
[0] 
    request for regIOobject injectionRateSuSp from objectRegistry region0 failed
    available objects of type regIOobject are

Does anyone know what I need to put in place of "injectionRateSuSp"?

Or if there is a better method for calculating age of air?

Thanks in advance for any support.

Kind regards,
Ben

My 0/AoA file is:

FoamFile
{
    version     2.0;
    format      ascii;
    class       volScalarField;
	location    "0";
    object      AoA;
}
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //

dimensions      [0 0 1 0 0 0 0];

internalField   uniform 0;

boundaryField
{
    "xmin|xmax|ymin|ymax|zmax_north|zmax_south"
    {
        type            fixedValue;
        value           uniform 0;
    }
	"zmin|Ceiling|Floor|East_Wall|North_Wall|South_Wall|West_Wall|Computer|Person|zmax_ceiling"
    {
        type            zeroGradient;
    }
	Inlet
    {
        type            fixedValue;
        value           uniform 0;
    }
	
	#includeEtc "caseDicts/setConstraintTypes"
}

fvSolutions:

AoA
    {
        solver           smoothSolver;
        smoother         GaussSeidel;
        tolerance        1e-08;
        relTol           0.1;
        nsweep           1;
    }

fvSchemes:

div(phi,AoA) bounded Gauss upwind;

[Tobermory]

There were some changes in v8 to the semiImplicit source term syntax. Check out https://openfoam.org/release/8/ and the example in https://github.com/OpenFOAM/OpenFOAM...7e9747fe696aeb. I am guessing that you need to change:

				sources
				{
					injectionRateSuSp
					{
						AoA       (1 0);
					}
				}

to something like:

				sources
				{
					AoA
					{
						explicit 1;
						implicit 0;
					}
				}

Good luck!

[b.simpson]

Thank you for your reply Tobermory.

The changes you suggested worked and my AoA is now working.

Many thanks.

Ben