[mxylondon]

Hi Foamers,


I am using solver 'pimpleDyMFoam' for a turbine simulation. Regarding forces and moments, I am facing a tricky problem. By using data processing function:


~~~~~~~~~~~~~
forces_B1
{
type forces;

libs ("libforces.so");

writeControl timeStep;

timeInterval 1;

log yes;

patches (B1);

rho rhoInf; // Indicates incompressible

rhoInf 1000; // Redundant for incompressible

pRef 0;

CofR (0 0 0); // Rotation around centre line of propeller

pitchAxis (0 1 0);
}

~~~~~~~~~~~~~



I was expecting to get forces and moments written in files 'force' and 'moment' in '~/postProcessing' folder for each of my pre-defined time step (the same as the frequency I save my results in time folders). However, the reality is I got all the information for each supper small time step over the whole simulation, making the files of 'force' and 'moment' are really big and not easy for data-processing, as follows:



###############
# Force
# CofR : (0.00000000e+00 -5.50000000e-03 0.00000000e+00)
#
# Time (total_x total_y total_z) (pressure_x pressure_y pressure_z) (viscous_x viscous_y viscous_z)
3.00003 (-6.68879366e-04 -7.93099615e-17 -3.03082242e-02) (6.04297000e-04 -2.60464004e-21 -3.02759232e-02) (-1.27317637e-03 -7.93073569e-17 -3.23009697e-05)
3.00006 (-8.14661422e-04 -9.73645612e-17 -3.03964489e-02) (4.58757976e-04 7.29208056e-22 -3.03645891e-02) (-1.27341940e-03 -9.73652905e-17 -3.18598752e-05)
3.00009 (-7.48561779e-04 -1.03756018e-16 -3.04441066e-02) (5.25068059e-04 -3.95669420e-21 -3.04126881e-02) (-1.27362984e-03 -1.03752061e-16 -3.14185172e-05)
3.00012 (-7.86641948e-04 -9.47003107e-17 -3.02424178e-02) (4.87213089e-04 8.37290438e-22 -3.02114511e-02) (-1.27385504e-03 -9.47011480e-17 -3.09667115e-05)
3.00015 (-8.24537544e-04 -9.63127058e-17 -3.01473255e-02) (4.49560082e-04 2.39034801e-21 -3.01168150e-02) (-1.27409763e-03 -9.63150962e-17 -3.05104898e-05)
3.00017 (-8.40240952e-04 2.76094722e-16 -3.01795111e-02) (4.34103681e-04 6.58401430e-21 -3.01494560e-02) (-1.27434463e-03 2.76088138e-16 -3.00550485e-05)
3.0002 (-9.19688786e-04 -4.49227793e-16 -2.98249548e-02) (3.54935307e-04 -7.83904953e-21 -2.97953691e-02) (-1.27462409e-03 -4.49219954e-16 -2.95856847e-05)
3.00023 (-9.57160100e-04 -7.46556331e-17 -2.96655836e-02) (3.17751524e-04 -3.63807131e-21 -2.96364731e-02) (-1.27491162e-03 -7.46519950e-17 -2.91104708e-05)
3.00026 (-1.01225594e-03 -9.85058572e-17 -2.94354778e-02) (2.62960166e-04 4.34692900e-21 -2.94068501e-02) (-1.27521610e-03 -9.85102042e-17 -2.86277017e-05)
3.00029 (-1.03745742e-03 -9.53172553e-17 -2.93424907e-02) (2.38061553e-04 2.62525138e-21 -2.93143475e-02) (-1.27551897e-03 -9.53198805e-17 -2.81432363e-05)
3.00032 (-1.08585870e-03 -8.96964222e-17 -2.91880428e-02) (1.89976770e-04 1.85056863e-21 -2.91603873e-02) (-1.27583547e-03 -8.96982728e-17 -2.76554910e-05)
3.00035 (-1.10805064e-03 -7.84020546e-17 -2.91683912e-02) (1.68101309e-04 3.63056213e-21 -2.91412222e-02) (-1.27615195e-03 -7.84056851e-17 -2.71690340e-05)
3.00038 (-1.09729403e-03 2.74840331e-16 -2.92504552e-02) (1.79155188e-04 -3.84467168e-22 -2.92237680e-02) (-1.27644921e-03 2.74840716e-16 -2.66871538e-05)
3.00041 (-1.08476468e-03 -4.42963706e-16 -2.93843943e-02) (1.91964827e-04 1.46699282e-21 -2.93581823e-02) (-1.27672950e-03 -4.42965173e-16 -2.62120155e-05)
3.00044 (-1.09051182e-03 -8.39601051e-17 -2.95157780e-02) (1.86495738e-04 2.23225052e-21 -2.94900347e-02) (-1.27700756e-03 -8.39623374e-17 -2.57432239e-05)
...

###############




Any ideas about what I did wrong??


Great thanks!

[mxylondon]

Solved.

This is due to the conflict between a normal time step setup in 'forces' and the 'adjustableRunTime' in 'controlDict'.