[pruthvi1991]

Hello all! I simulated an oscillating airfoil using pimpleDyMfoam and got some results. Later I added a forcecoeffs file and ran it again to measure forces and the solution is crashing.

I checked the log files and it seems like the forcecoeffs is altering the initial conditions of the spring. I gave anchor(0,0,0) , refattachment(0,0,0), velocity(0, 0.8, 0). In the log.pimpleDyMfoam file, it shows the initial spring length as (0, 9e-5,0) when it should actually be (0,0,0).

Here is my forcecoeffs file. At the end of the controldict file I added #include "forceCoeffs"

forceCoeffs1
{
type forceCoeffs;
// type forces;

functionObjectLibs ( "libforces.so" );

outputControl timeStep;
timeInterval 1;

log yes;

patches ( wing );
pName p;
UName U;
rhoName rhoInf; // Indicates incompressible
log true;
rhoInf 1; // Redundant for incompressible
liftDir (0 0 1);
dragDir (1 0 0);
CofR (0 0 0); // Axle midpoint on ground
pitchAxis (0 1 0);
magUInf 0;
lRef 0.001; // Wheelbase length
Aref 0.002; // Estimated

// binData
// {
// nBin 20; // output data into 20 bins
// direction (1 0 0); // bin direction
// cumulative yes;
// }
}

I uploaded the log.pimpleDyMfoam and dynamicMeshDict files. Please help me guys.