[boffin5]

Hi, in order to learn how to simulate car heat exchangers, I am trying to run the simpleCar tutorial that I found in v2012, by first converting it to OpenFoam8. I have focused on the latter version, and until now have been able to adapt v2012 cases.
The trouble arises when I run simpleFoam, and get the following error message:

Create time

Create mesh for time = 0


SIMPLE: Convergence criteria found
        p: tolerance 0.01
        U: tolerance 0.0001
        "(k|epsilon)": tolerance 0.0001

Reading field p

Reading field U

Reading/calculating face flux field phi

Selecting incompressible transport model Newtonian
Selecting turbulence model type RAS
Selecting RAS turbulence model kEpsilon
RAS
{
    RASModel        kEpsilon;
    turbulence      on;
    printCoeffs     on;
    Cmu             0.09;
    C1              1.44;
    C2              1.92;
    C3              0;
    sigmak          1;
    sigmaEps        1.3;
}

No MRF models present

Creating finite volume options from "system/fvOptions"

Selecting finite volume options model type explicitPorositySource
    Source: porosity1
    - selecting cells using cellZone porousZone
    - selected 10 cell(s) with volume 0.002
Porosity region porosity1:
    selecting model: DarcyForchheimer
    creating porous zone: porousZone

Starting time loop


--> FOAM FATAL IO ERROR: 
keyword type is undefined in dictionary "/home/boffin5/cfdaero/simpleCar/system/controlDict/functions/fieldAverage"

file: /home/boffin5/cfdaero/simpleCar/system/controlDict/functions/fieldAverage from line 6 to line 16.

    From function const Foam::entry& Foam::dictionary::lookupEntry(const Foam::word&, bool, bool) const
     in file db/dictionary/dictionary.C at line 797.

It seems to fail on the term 'fieldAverage'. I have looked in the V8 tutorials for examples, and tried to incorporate them into the controlDict, which here shows my different attempts:

application     simpleFoam;

startFrom       startTime;

startTime       0;

stopAt          endTime;

endTime         5000;

deltaT          1;

writeControl    timeStep;

writeInterval   100;

purgeWrite      10;

writeFormat     ascii;

writePrecision  6;

writeCompression off;

timeFormat      general;

timePrecision   6;

runTimeModifiable true;

functions
{
    //#include "forceCoeffs"
    
    //#include "fieldAverage"
    
    #includeFunc fieldAverage(U, p, prime2Mean = yes)
    
    //#includeFunc fieldAverage      //(U, p, prime2Mean=yes)
    
    //#include "runTimeControls"
 }

Apparently I have to add a line with #includeFunc, but I can't find the format that will make it work. In addition to the above, I also tried includeFunc with just U & p, but no dice. I would appreciate any ideas on how to resolve this problem.

[Tobermory]

Alan

for details on fieldAverage, check out the Doxygen page: https://cpp.openfoam.org/v8/classFoa...e.html#details. This has an example of its usage.

However, I am confused - fieldAverage is a functionObject for doing time averaging of transient runs ... but you are trying use it in a simpleFoam run, which clearly makes no sense. Are you trying to get a spatial volume average? If so, you probably want something like: https://cpp.openfoam.org/v8/classFoa...e.html#details.

[boffin5]

In the link below, the simpleCar tutorial from v2012 was modified and cleaned up. I was able to run the case.



https://develop.openfoam.com/Develop...4537a65abe171d