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-   -   No forces.dat file - any clues please? (http://www.cfd-online.com/Forums/openfoam/114628-no-forces-dat-file-any-clues-please.html)

greenleader March 14, 2013 10:42

No forces.dat file - any clues please?
 
Hi everyone,
I have searched the forum and found various useful posts on forces. I've put the necessary lines into the controlDict.
When I run simpleFoam, I don't get any errors or warnings, but there is no sign of the forces.dat file.
Can anyone give me some clues as to what I might be missing? or where I should look for it?

Thanks in advance

Correction!
I do get a warning that says:
"Could not find U,p or rho in database. De-activating forces."

A.Wendy March 15, 2013 05:16

have you fixed it? if not posting the control dict would be helpful

greetz

Andy

greenleader March 15, 2013 10:25

Hi Andy, thanks for replying!
Here is my controlDict file - no have not managed to fix it yet!:confused:
Any pointers are appreciated!

Code:

FoamFile
{
    version    2.0;
    format      ascii;
    class      dictionary;
    location    "system";
    object      controlDict;
}

application    simpleFoam;
startFrom      latestTime;
startTime      0;
stopAt          endTime;
endTime        100;
deltaT          1;
writeControl    timeStep;
writeInterval  50;
purgeWrite      0;
writeFormat    ascii;
writePrecision  6;
writeCompression off;
timeFormat      general;
timePrecision  6;
runTimeModifiable true;

functions
(
    forces
    {
        type forces;
        functionObjectLibs ("libforces.so"); //Lib to load
        enabled    true;
        outputControl timeStep;
        outputInterval 1;
        patches (XXXX); // change to your patch name
        rhoInf 1.225; //Reference density for fluid
        CofR (-1.0 -6.35 0.5); //Origin for moment calculations
        log true;
        pName p;
        UName U;
    }
);


greenleader March 16, 2013 10:39

Managed to fix it.
I had left out
rhoName rhoInf;

on the bottom of the file!!


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