# time step continuity problem in VAWT simulation

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 October 15, 2015, 06:13 time step continuity problem in VAWT simulation #1 Member   Mike Lob Join Date: Oct 2015 Location: It Posts: 51 Rep Power: 10 Hi everyone! I'm trying to simulate the flowfield on a VAWT Darrieus Turbine. I generated 2 different mesh from Pointwise, one for the rotor, another for the volume in which i'm running the simulation. Than i merged that with mergeMeshes. Set the rotation using Pointwise cell and dynamicMeshDict. I'm using pimpleDyMFoam with GAMG, the calculation starts, but the number of iteration for the first time step is huge and time step continuity errors gets bigger and bigger. Note that: pala*, is the airfoil of the wind turbine cubo*, is just part of the volume in which the case is running fisso*, volume* are cyclicAMI Here are all the attachments:

 October 15, 2015, 06:14 #2 Member   Mike Lob Join Date: Oct 2015 Location: It Posts: 51 Rep Power: 10 log file Code: ``` PIMPLE: iteration 1 smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 2.49637e-14, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 1, Final residual = 2.85471e-14, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 2.78977e-14, No Iterations 1 GAMG: Solving for p, Initial residual = 1, Final residual = 0.00808571, No Iterations 13 time step continuity errors : sum local = 4.41e-11, global = -5.01669e-12, cumulative = -5.01669e-12 GAMG: Solving for p, Initial residual = 0.166509, Final residual = 0.000825118, No Iterations 7 time step continuity errors : sum local = 2.09824e-10, global = -4.30853e-11, cumulative = -4.8102e-11 PIMPLE: iteration 2 smoothSolver: Solving for Ux, Initial residual = 0.616245, Final residual = 1.41262e-05, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0.129979, Final residual = 4.87507e-06, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.130425, Final residual = 3.96162e-06, No Iterations 1 GAMG: Solving for p, Initial residual = 0.132593, Final residual = 0.000787422, No Iterations 7 time step continuity errors : sum local = 2.12629e-10, global = -4.30272e-11, cumulative = -9.11292e-11 GAMG: Solving for p, Initial residual = 0.115701, Final residual = 0.000790563, No Iterations 5 time step continuity errors : sum local = 3.43266e-10, global = -5.17038e-11, cumulative = -1.42833e-10 PIMPLE: iteration 3 smoothSolver: Solving for Ux, Initial residual = 0.0630906, Final residual = 0.00458348, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0.0110506, Final residual = 0.000677898, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 0.00817843, Final residual = 0.000674459, No Iterations 3 GAMG: Solving for p, Initial residual = 0.660562, Final residual = 0.00658876, No Iterations 64 time step continuity errors : sum local = 7.75362e-09, global = -3.95022e-12, cumulative = -1.46783e-10 GAMG: Solving for p, Initial residual = 0.34499, Final residual = 0.00343841, No Iterations 70 time step continuity errors : sum local = 1.98197e-08, global = -5.96419e-11, cumulative = -2.06425e-10 PIMPLE: iteration 4 smoothSolver: Solving for Ux, Initial residual = 0.982638, Final residual = 0.0722246, No Iterations 3 smoothSolver: Solving for Uy, Initial residual = 0.988885, Final residual = 0.0726794, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 0.983183, Final residual = 0.072299, No Iterations 3 GAMG: Solving for p, Initial residual = 0.998999, Final residual = 0.00962466, No Iterations 154 time step continuity errors : sum local = 2.82917e-05, global = -2.73187e-09, cumulative = -2.9383e-09 GAMG: Solving for p, Initial residual = 0.000466197, Final residual = 4.64261e-06, No Iterations 207 time step continuity errors : sum local = 0.000460808, global = -1.49189e-07, cumulative = -1.52128e-07 PIMPLE: iteration 5 smoothSolver: Solving for Ux, Initial residual = 0.998628, Final residual = 0.0978001, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.998121, Final residual = 0.0977083, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.998746, Final residual = 0.0978102, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0698349, Final residual = 0.000631727, No Iterations 42 time step continuity errors : sum local = 0.279906, global = 0.000685844, cumulative = 0.000685692 GAMG: Solving for p, Initial residual = 4.2465e-08, Final residual = 4.2465e-08, No Iterations 0 time step continuity errors : sum local = 73.2725, global = -0.000797158, cumulative = -0.000111465 PIMPLE: iteration 6 smoothSolver: Solving for Ux, Initial residual = 0.997507, Final residual = 0.0408674, No Iterations 3 smoothSolver: Solving for Uy, Initial residual = 0.997316, Final residual = 0.0408327, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 0.997554, Final residual = 0.0408676, No Iterations 3 GAMG: Solving for p, Initial residual = 0.00142366, Final residual = 1.39848e-05, No Iterations 364 time step continuity errors : sum local = 1086.86, global = -42.1764, cumulative = -42.1765 GAMG: Solving for p, Initial residual = 4.33906e-11, Final residual = 4.33906e-11, No Iterations 0 time step continuity errors : sum local = 368842, global = -15.6452, cumulative = -57.8217 PIMPLE: iteration 7 smoothSolver: Solving for Ux, Initial residual = 0.98951, Final residual = 0.00299387, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.981899, Final residual = 0.00318746, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.987728, Final residual = 0.0030354, No Iterations 2 GAMG: Solving for p, Initial residual = 2.87655e-07, Final residual = 8.20569e-08, No Iterations 2 time step continuity errors : sum local = 2.94219e+06, global = 50046.2, cumulative = 49988.4 GAMG: Solving for p, Initial residual = 3.15004e-13, Final residual = 3.15004e-13, No Iterations 0 time step continuity errors : sum local = 3.81806e+07, global = 16551.4, cumulative = 66539.8 PIMPLE: iteration 8 smoothSolver: Solving for Ux, Initial residual = 0.99324, Final residual = 0.0202374, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.984123, Final residual = 0.0197882, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.991156, Final residual = 0.0201318, No Iterations 2 GAMG: Solving for p, Initial residual = 1.223e-07, Final residual = 7.29218e-08, No Iterations 2 time step continuity errors : sum local = 2.09341e+09, global = 2.06686e+07, cumulative = 2.07351e+07 GAMG: Solving for p, Initial residual = 3.83492e-13, Final residual = 3.83492e-13, No Iterations 0 time step continuity errors : sum local = 2.31154e+10, global = 5.76172e+06, cumulative = 2.64969e+07 PIMPLE: iteration 9 smoothSolver: Solving for Ux, Initial residual = 0.998567, Final residual = 0.0721183, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.997347, Final residual = 0.0725961, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.998323, Final residual = 0.0721812, No Iterations 2 GAMG: Solving for p, Initial residual = 5.87591e-08, Final residual = 5.87591e-08, No Iterations 0 time step continuity errors : sum local = 5.03518e+12, global = -851499, cumulative = 2.56454e+07 GAMG: Solving for p, Initial residual = 6.40719e-08, Final residual = 6.40719e-08, No Iterations 0 time step continuity errors : sum local = 5.49045e+12, global = -852827, cumulative = 2.47925e+07 PIMPLE: iteration 10 smoothSolver: Solving for Ux, Initial residual = 0.991257, Final residual = 0.00126755, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.991242, Final residual = 0.0012675, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.991255, Final residual = 0.00126755, No Iterations 4 GAMG: Solving for p, Initial residual = 2.83486e-05, Final residual = 2.78443e-07, No Iterations 476 time step continuity errors : sum local = 7.89681e+13, global = 7.90082e+09, cumulative = 7.92561e+09 GAMG: Solving for p, Initial residual = 7.28708e-14, Final residual = 7.28708e-14, No Iterations 0 time step continuity errors : sum local = 1.69118e+17, global = 1.67098e+12, cumulative = 1.67891e+12 PIMPLE: iteration 11 smoothSolver: Solving for Ux, Initial residual = 0.994182, Final residual = 0.0014273, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.99709, Final residual = 0.00132306, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.997727, Final residual = 0.00131261, No Iterations 2 GAMG: Solving for p, Initial residual = 1.98488e-05, Final residual = 1.98321e-07, No Iterations 759 time step continuity errors : sum local = 2.34008e+16, global = 5.8166e+12, cumulative = 7.49551e+12 GAMG: Solving for p, Initial residual = 2.26884e-12, Final residual = 2.26884e-12, No Iterations 0 time step continuity errors : sum local = 1.06405e+19, global = -7.31893e+13, cumulative = -6.56938e+13 PIMPLE: iteration 12 smoothSolver: Solving for Ux, Initial residual = 0.995118, Final residual = 0.0175633, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.993056, Final residual = 0.017419, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.994499, Final residual = 0.0175166, No Iterations 2 GAMG: Solving for p, Initial residual = 4.89944e-07, Final residual = 7.80626e-08, No Iterations 8 time step continuity errors : sum local = 1.91622e+20, global = 7.60396e+16, cumulative = 7.59739e+16 GAMG: Solving for p, Initial residual = 9.02203e-13, Final residual = 9.02203e-13, No Iterations 0 time step continuity errors : sum local = 1.71062e+22, global = 1.58506e+18, cumulative = 1.66103e+18 PIMPLE: iteration 13 smoothSolver: Solving for Ux, Initial residual = 0.990097, Final residual = 0.0229477, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.987019, Final residual = 0.0225001, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.989434, Final residual = 0.022828, No Iterations 2 GAMG: Solving for p, Initial residual = 7.82812e-08, Final residual = 7.82812e-08, No Iterations 0 time step continuity errors : sum local = 6.06662e+23, global = 1.39824e+18, cumulative = 3.05927e+18 GAMG: Solving for p, Initial residual = 8.48612e-08, Final residual = 8.48612e-08, No Iterations 0 time step continuity errors : sum local = 6.57656e+23, global = 1.36088e+18, cumulative = 4.42015e+18 PIMPLE: iteration 14 smoothSolver: Solving for Ux, Initial residual = 0.99537, Final residual = 0.0344139, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.99524, Final residual = 0.0344185, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.995337, Final residual = 0.0344148, No Iterations 2 GAMG: Solving for p, Initial residual = 1.17968e-05, Final residual = 1.16841e-07, No Iterations 110 time step continuity errors : sum local = 2.17112e+24, global = 9.08021e+22, cumulative = 9.08065e+22 GAMG: Solving for p, Initial residual = 1.01278e-13, Final residual = 1.01278e-13, No Iterations 0 time step continuity errors : sum local = 7.83079e+27, global = 3.95176e+22, cumulative = 1.30324e+23 PIMPLE: iteration 15 smoothSolver: Solving for Ux, Initial residual = 0.999463, Final residual = 0.00546958, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.999025, Final residual = 0.00546167, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.999773, Final residual = 0.00547299, No Iterations 2 GAMG: Solving for p, Initial residual = 1.00373e-06, Final residual = 9.77242e-08, No Iterations 23 time step continuity errors : sum local = 4.63235e+28, global = 3.52165e+27, cumulative = 3.52178e+27 GAMG: Solving for p, Initial residual = 2.59211e-13, Final residual = 2.59211e-13, No Iterations 0 time step continuity errors : sum local = 4.76462e+30, global = 1.2969e+27, cumulative = 4.81868e+27 PIMPLE: iteration 16 smoothSolver: Solving for Ux, Initial residual = 0.994007, Final residual = 0.0166685, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.992732, Final residual = 0.0166767, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.99359, Final residual = 0.0166783, No Iterations 2 GAMG: Solving for p, Initial residual = 2.62176e-06, Final residual = 9.86938e-08, No Iterations 21 time step continuity errors : sum local = 2.04098e+31, global = -3.87112e+30, cumulative = -3.8663e+30 GAMG: Solving for p, Initial residual = 9.45924e-13, Final residual = 9.45924e-13, No Iterations 0 time step continuity errors : sum local = 4.57275e+33, global = -2.73623e+30, cumulative = -6.60252e+30```

 October 15, 2015, 06:15 #3 Member   Mike Lob Join Date: Oct 2015 Location: It Posts: 51 Rep Power: 10 Code: ```PIMPLE: iteration 17 smoothSolver: Solving for Ux, Initial residual = 0.985753, Final residual = 0.0394114, No Iterations 1 smoothSolver: Solving for Uy, Initial residual = 0.984547, Final residual = 0.0391394, No Iterations 1 smoothSolver: Solving for Uz, Initial residual = 0.985481, Final residual = 0.0392419, No Iterations 1 GAMG: Solving for p, Initial residual = 8.73274e-07, Final residual = 9.91197e-08, No Iterations 25 time step continuity errors : sum local = 1.92743e+34, global = 1.00819e+33, cumulative = 1.00159e+33 GAMG: Solving for p, Initial residual = 9.71117e-12, Final residual = 9.71117e-12, No Iterations 0 time step continuity errors : sum local = 1.16766e+36, global = 3.02168e+32, cumulative = 1.30376e+33 PIMPLE: iteration 18 smoothSolver: Solving for Ux, Initial residual = 0.994286, Final residual = 0.0377732, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.993101, Final residual = 0.0381006, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.993921, Final residual = 0.0377407, No Iterations 2 GAMG: Solving for p, Initial residual = 4.75613e-07, Final residual = 9.60022e-08, No Iterations 7 time step continuity errors : sum local = 1.23822e+38, global = -2.28473e+36, cumulative = -2.28343e+36 GAMG: Solving for p, Initial residual = 4.29534e-11, Final residual = 4.29534e-11, No Iterations 0 time step continuity errors : sum local = 1.50703e+39, global = -7.85489e+35, cumulative = -3.06891e+36 PIMPLE: iteration 19 smoothSolver: Solving for Ux, Initial residual = 0.993611, Final residual = 0.00693789, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.988574, Final residual = 0.0311961, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.993369, Final residual = 0.00466954, No Iterations 2 GAMG: Solving for p, Initial residual = 0.000346911, Final residual = 3.40028e-06, No Iterations 35 time step continuity errors : sum local = 8.90928e+39, global = 3.20522e+38, cumulative = 3.17453e+38 GAMG: Solving for p, Initial residual = 3.77969e-11, Final residual = 3.77969e-11, No Iterations 0 time step continuity errors : sum local = 1.64211e+42, global = 1.01557e+38, cumulative = 4.1901e+38 PIMPLE: iteration 20 smoothSolver: Solving for Ux, Initial residual = 0.991959, Final residual = 0.0579415, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.991925, Final residual = 0.087055, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.990317, Final residual = 0.0502125, No Iterations 2 GAMG: Solving for p, Initial residual = 1.72486e-05, Final residual = 1.67883e-07, No Iterations 23 time step continuity errors : sum local = 3.53028e+43, global = 9.35766e+41, cumulative = 9.36185e+41 GAMG: Solving for p, Initial residual = 8.72465e-12, Final residual = 8.72465e-12, No Iterations 0 time step continuity errors : sum local = 5.19123e+45, global = 3.43068e+41, cumulative = 1.27925e+42 PIMPLE: iteration 21 smoothSolver: Solving for Ux, Initial residual = 0.985264, Final residual = 0.0592161, No Iterations 3 smoothSolver: Solving for Uy, Initial residual = 0.985617, Final residual = 0.0595835, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 0.985759, Final residual = 0.0590704, No Iterations 3 GAMG: Solving for p, Initial residual = 0.000486053, Final residual = 4.69196e-06, No Iterations 22 time step continuity errors : sum local = 1.0733e+47, global = -3.43595e+45, cumulative = -3.43467e+45 GAMG: Solving for p, Initial residual = 4.96428e-08, Final residual = 4.96428e-08, No Iterations 0 time step continuity errors : sum local = 2.213e+49, global = -1.70873e+45, cumulative = -5.1434e+45 PIMPLE: iteration 22 smoothSolver: Solving for Ux, Initial residual = 0.995176, Final residual = 0.0486652, No Iterations 3 smoothSolver: Solving for Uy, Initial residual = 0.995195, Final residual = 0.0486729, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 0.995156, Final residual = 0.0486722, No Iterations 3 GAMG: Solving for p, Initial residual = 0.682619, Final residual = 0.00681379, No Iterations 51 time step continuity errors : sum local = 8.17385e+50, global = -5.25098e+47, cumulative = -5.30241e+47 GAMG: Solving for p, Initial residual = 1.08342e-08, Final residual = 1.08342e-08, No Iterations 0 time step continuity errors : sum local = 1.32546e+53, global = 2.03494e+48, cumulative = 1.5047e+48 PIMPLE: iteration 23 smoothSolver: Solving for Ux, Initial residual = 0.984067, Final residual = 0.0829088, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.984554, Final residual = 0.0829242, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.9846, Final residual = 0.0829219, No Iterations 2 GAMG: Solving for p, Initial residual = 0.398936, Final residual = 0.00369698, No Iterations 25 time step continuity errors : sum local = 2.19833e+54, global = 3.12079e+52, cumulative = 3.12094e+52 GAMG: Solving for p, Initial residual = 9.1991e-08, Final residual = 9.1991e-08, No Iterations 0 time step continuity errors : sum local = 3.75852e+56, global = 3.88852e+52, cumulative = 7.00946e+52 PIMPLE: iteration 24 smoothSolver: Solving for Ux, Initial residual = 0.994046, Final residual = 0.090959, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.994048, Final residual = 0.0909252, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.993961, Final residual = 0.0909041, No Iterations 2 GAMG: Solving for p, Initial residual = 0.848587, Final residual = 0.00769635, No Iterations 22 time step continuity errors : sum local = 1.10779e+58, global = 1.58049e+56, cumulative = 1.58119e+56 GAMG: Solving for p, Initial residual = 2.41036e-08, Final residual = 2.41036e-08, No Iterations 0 time step continuity errors : sum local = 1.78147e+60, global = -8.98121e+54, cumulative = 1.49138e+56 PIMPLE: iteration 25 smoothSolver: Solving for Ux, Initial residual = 0.985409, Final residual = 0.0976268, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.985872, Final residual = 0.0976392, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.985929, Final residual = 0.0976339, No Iterations 2 GAMG: Solving for p, Initial residual = 0.34435, Final residual = 0.00318646, No Iterations 22 time step continuity errors : sum local = 3.72033e+61, global = 5.45526e+59, cumulative = 5.45675e+59 GAMG: Solving for p, Initial residual = 2.17059e-08, Final residual = 2.17059e-08, No Iterations 0 time step continuity errors : sum local = 6.97103e+63, global = -5.90904e+58, cumulative = 4.86585e+59 PIMPLE: iteration 26 smoothSolver: Solving for Ux, Initial residual = 0.995057, Final residual = 0.0272908, No Iterations 3 smoothSolver: Solving for Uy, Initial residual = 0.99507, Final residual = 0.0273262, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 0.995016, Final residual = 0.0273368, No Iterations 3 GAMG: Solving for p, Initial residual = 0.61391, Final residual = 0.00608321, No Iterations 68 time step continuity errors : sum local = 3.72131e+65, global = 2.00756e+62, cumulative = 2.01242e+62 GAMG: Solving for p, Initial residual = 4.74907e-08, Final residual = 4.74907e-08, No Iterations 0 time step continuity errors : sum local = 8.03038e+67, global = 5.25702e+63, cumulative = 5.45826e+63 PIMPLE: iteration 27 smoothSolver: Solving for Ux, Initial residual = 0.97703, Final residual = 0.0743789, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.977785, Final residual = 0.0743152, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.977813, Final residual = 0.0742994, No Iterations 2 GAMG: Solving for p, Initial residual = 0.756536, Final residual = 0.00725901, No Iterations 37 time step continuity errors : sum local = 8.15355e+68, global = -1.12884e+67, cumulative = -1.1283e+67 GAMG: Solving for p, Initial residual = 1.09514e-07, Final residual = 2.08685e-08, No Iterations 1 time step continuity errors : sum local = 2.46675e+70, global = 2.2231e+67, cumulative = 1.0948e+67 PIMPLE: iteration 28 smoothSolver: Solving for Ux, Initial residual = 0.99716, Final residual = 0.0768253, No Iterations 5 smoothSolver: Solving for Uy, Initial residual = 0.997224, Final residual = 0.0767676, No Iterations 5 smoothSolver: Solving for Uz, Initial residual = 0.99719, Final residual = 0.076746, No Iterations 5 GAMG: Solving for p, Initial residual = 0.557303, Final residual = 0.00536858, No Iterations 30 time step continuity errors : sum local = 7.4905e+72, global = 1.56968e+70, cumulative = 1.57078e+70 GAMG: Solving for p, Initial residual = 6.42801e-08, Final residual = 6.42801e-08, No Iterations 0 time step continuity errors : sum local = 9.6001e+74, global = -1.31788e+71, cumulative = -1.16081e+71 PIMPLE: iteration 29 smoothSolver: Solving for Ux, Initial residual = 0.986285, Final residual = 0.0673124, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.986847, Final residual = 0.0672444, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.986977, Final residual = 0.0672249, No Iterations 2 GAMG: Solving for p, Initial residual = 0.695817, Final residual = 0.00638954, No Iterations 15 time step continuity errors : sum local = 8.18519e+75, global = -4.5645e+74, cumulative = -4.56566e+74 GAMG: Solving for p, Initial residual = 1.84291e-07, Final residual = 3.74045e-08, No Iterations 1 time step continuity errors : sum local = 2.23164e+77, global = -1.55497e+74, cumulative = -6.12064e+74 PIMPLE: iteration 30 smoothSolver: Solving for Ux, Initial residual = 0.996761, Final residual = 0.0606023, No Iterations 5 smoothSolver: Solving for Uy, Initial residual = 0.99677, Final residual = 0.0612115, No Iterations 5 smoothSolver: Solving for Uz, Initial residual = 0.996829, Final residual = 0.0611781, No Iterations 5 GAMG: Solving for p, Initial residual = 0.613433, Final residual = 0.00607106, No Iterations 53 time step continuity errors : sum local = 4.48328e+79, global = -1.18692e+78, cumulative = -1.18753e+78 GAMG: Solving for p, Initial residual = 5.84873e-08, Final residual = 5.84873e-08, No Iterations 0 time step continuity errors : sum local = 6.19905e+81, global = -9.97691e+77, cumulative = -2.18522e+78 PIMPLE: iteration 31 smoothSolver: Solving for Ux, Initial residual = 0.952807, Final residual = 0.058891, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.954521, Final residual = 0.0592418, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.954898, Final residual = 0.0593542, No Iterations 2 GAMG: Solving for p, Initial residual = 0.371946, Final residual = 0.00360844, No Iterations 20 time step continuity errors : sum local = 2.7809e+82, global = -4.09669e+80, cumulative = -4.11854e+80 GAMG: Solving for p, Initial residual = 1.74061e-07, Final residual = 4.09465e-08, No Iterations 1 time step continuity errors : sum local = 8.05945e+83, global = 6.17798e+79, cumulative = -3.50074e+80 PIMPLE: iteration 32 smoothSolver: Solving for Ux, Initial residual = 0.9926, Final residual = 0.0569642, No Iterations 5 smoothSolver: Solving for Uy, Initial residual = 0.992885, Final residual = 0.0577423, No Iterations 5 smoothSolver: Solving for Uz, Initial residual = 0.993074, Final residual = 0.0579465, No Iterations 5 GAMG: Solving for p, Initial residual = 0.0399935, Final residual = 0.000381604, No Iterations 32 time step continuity errors : sum local = 5.67533e+85, global = -5.85781e+84, cumulative = -5.85816e+84 GAMG: Solving for p, Initial residual = 1.16347e-08, Final residual = 1.16347e-08, No Iterations 0 time step continuity errors : sum local = 7.63996e+87, global = -2.45486e+84, cumulative = -8.31302e+84 PIMPLE: iteration 33 smoothSolver: Solving for Ux, Initial residual = 0.989217, Final residual = 0.0461757, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.985905, Final residual = 0.0457226, No Iterations 2 smoothSolver: Solving for Uz, Initial residual = 0.984847, Final residual = 0.0456371, No Iterations 2```

 October 15, 2015, 06:17 #4 Member   Mike Lob Join Date: Oct 2015 Location: It Posts: 51 Rep Power: 10 controlDict Code: ``` /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.0 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; location "system"; object controlDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // application pimpleDyMFoam; startFrom startTime; startTime 0; stopAt endTime; endTime 0.7853976; deltaT 0.0000109083; writeControl adjustableRunTime; writeInterval 0.0000109083; purgeWrite 0; writeFormat ascii; writePrecision 6; writeCompression off; timeFormat general; timePrecision 6; runTimeModifiable true; adjustTimeStep yes; maxCo 1; // ************************************************************************* // functions ( forces { type forces; functionObjectLibs ("libforces.so"); outputControl timeStep; outputInterval 1; patches (pala1 pala1sopra pala1sotto pala2 pala2sopra pala2sotto pala3 pala3sopra pala3sotto); // pname p; // Uname U; rhoName rhoInf; log true; rhoInf 1.205; CofR (0 0 0); } );``` fvSchemes Code: ``` /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.0 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; location "system"; object fvSchemes; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // ddtSchemes { default Euler; } gradSchemes { default leastSquares; grad(p) leastSquares; grad(U) leastSquares; } divSchemes { default none; div(phi,U) Gauss linearUpwind grad(U); div(phi,k) Gauss upwind; div(phi,omega) Gauss upwind; div((nuEff*dev(T(grad(U))))) Gauss linear; } laplacianSchemes { default Gauss linear corrected; } interpolationSchemes { default linear; interpolate(HbyA) linear; } snGradSchemes { default corrected; } fluxRequired { default no; p ; pcorr ; } // ************************************************************************* //``` fvSolution Code: ``` /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.0 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; location "system"; object fvSolution; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // solvers { pcorr { solver GAMG; smoother GaussSeidel; nPreSweeps 0; nPostSweeps 2; cacheAgglomeration off; agglomerator faceAreaPair; nCellsInCoarsestLevel 10; mergeLevels 1; tolerance 0.02; relTol 0; } p { \$pcorr; tolerance 1e-07; relTol 0.01; } pFinal { \$p; tolerance 1e-07; relTol 0; } U { solver smoothSolver; smoother GaussSeidel; tolerance 1e-8; relTol 0.1; } UFinal { solver smoothSolver; smoother GaussSeidel; tolerance 1e-8; relTol 0.1; } "(k|omega)" { solver smoothSolver; smoother GaussSeidel; tolerance 1e-7; relTol 0.1; } "(k|omega)Final" { \$U; tolerance 1e-7; relTol 0; } cellMotionUx { solver PCG; preconditioner DIC; tolerance 1e-08; relTol 0; } } PIMPLE { correctPhi no; nOuterCorrectors 100; nCorrectors 2; nNonOrthogonalCorrectors 0; pRefCell 0; pRefValue 0; residualControl { "(p|U|k|omega)" { tolerance 1e-2; relTol 0; } } } relaxationFactors { fields { "p.*" 0.3; } equations { "U.*" 0.7; "k.*" 0.8; "omega.*" 0.8; } } // ************************************************************************* //``` boundary Code: ```/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.1 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class polyBoundaryMesh; location "0.000109083/polyMesh"; object boundary; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // 21 ( pala1 { type wall; inGroups 1(wall); nFaces 9506; startFace 5799010; } pala1sopra { type wall; inGroups 1(wall); nFaces 301; startFace 5808516; } pala1sotto { type wall; inGroups 1(wall); nFaces 301; startFace 5808817; } pala2 { type wall; inGroups 1(wall); nFaces 9506; startFace 5809118; } pala2sopra { type wall; inGroups 1(wall); nFaces 301; startFace 5818624; } pala2sotto { type wall; inGroups 1(wall); nFaces 301; startFace 5818925; } pala3 { type wall; inGroups 1(wall); nFaces 9506; startFace 5819226; } pala3sopra { type wall; inGroups 1(wall); nFaces 301; startFace 5828732; } pala3sotto { type wall; inGroups 1(wall); nFaces 301; startFace 5829033; } volumelato { type cyclicAMI; inGroups 1(cyclicAMI); nFaces 1026; startFace 5829334; matchTolerance 0.0001; transform noOrdering; neighbourPatch fisso; } volumesopra { type cyclicAMI; inGroups 1(cyclicAMI); nFaces 744; startFace 5830360; matchTolerance 0.0001; transform noOrdering; neighbourPatch fissosopra; } volumesotto { type cyclicAMI; inGroups 1(cyclicAMI); nFaces 744; startFace 5831104; matchTolerance 0.0001; transform noOrdering; neighbourPatch fissosotto; } cubodx { type patch; nFaces 592; startFace 5831848; } cubosopra { type patch; nFaces 588; startFace 5832440; } cubosotto { type patch; nFaces 588; startFace 5833028; } cubosx { type patch; nFaces 590; startFace 5833616; } fisso { type cyclicAMI; inGroups 1(cyclicAMI); nFaces 576; startFace 5834206; matchTolerance 0.0001; transform noOrdering; neighbourPatch volumelato; } fissosopra { type cyclicAMI; inGroups 1(cyclicAMI); nFaces 180; startFace 5834782; matchTolerance 0.0001; transform noOrdering; neighbourPatch volumesopra; } fissosotto { type cyclicAMI; inGroups 1(cyclicAMI); nFaces 180; startFace 5834962; matchTolerance 0.0001; transform noOrdering; neighbourPatch volumesotto; } inlet { type patch; nFaces 478; startFace 5835142; } outlet { type patch; nFaces 476; startFace 5835620; } ) // ************************************************************************* //``` dynamicMeshDict Code: ``` /*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.0 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; object dynamicMeshDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dynamicFvMesh solidBodyMotionFvMesh ; motionSolverLibs ("libfvMotionSolvers.so"); solidBodyMotionFvMeshCoeffs { cellZone rotor; solidBodyMotionFunction rotatingMotion; rotatingMotionCoeffs { origin (0 0 0); axis (0 0 1); omega 40;// rad/s } } // ************************************************************************* //``` decomposeParDict Code: ```/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.1 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class dictionary; object decomposeParDict; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // numberOfSubdomains 4; preservePatches (fisso fissosopra fissosotto volumelato volumesopra volumesotto); method scotch; distributed no; roots (); // ************************************************************************* //```

 October 15, 2015, 06:19 #5 Member   Mike Lob Join Date: Oct 2015 Location: It Posts: 51 Rep Power: 10 k Code: ```/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.0 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volScalarField; location "0"; object k; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [ 0 2 -2 0 0 0 0 ]; internalField uniform 0.375; boundaryField { inlet { type turbulentIntensityKineticEnergyInlet; intensity 0.05; value \$internalField; } outlet { type inletOutlet; inletValue \$internalField; value \$internalField; } pala1 { type kqRWallFunction; value \$internalField; } pala1sopra { type kqRWallFunction; value \$internalField; } pala1sotto { type kqRWallFunction; value \$internalField; } pala2 { type kqRWallFunction; value \$internalField; } pala2sopra { type kqRWallFunction; value \$internalField; } pala2sotto { type kqRWallFunction; value \$internalField; } pala3 { type kqRWallFunction; value \$internalField; } pala3sopra { type kqRWallFunction; value \$internalField; } pala3sotto { type kqRWallFunction; value \$internalField; } volumelato { type cyclicAMI; value \$internalField; } volumesopra { type cyclicAMI; value \$internalField; } volumesotto { type cyclicAMI; value \$internalField; } cubodx { type zeroGradient; } cubosopra { type zeroGradient; } cubosotto { type zeroGradient; } cubosx { type zeroGradient; } fisso { type cyclicAMI; value \$internalField; } fissosopra { type cyclicAMI; value \$internalField; } fissosotto { type cyclicAMI; value \$internalField; } } // ************************************************************************* //``` omega Code: ```/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.1 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volScalarField; object epsilon; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 0 -1 0 0 0 0]; internalField uniform 1118.034; boundaryField { cubodx { type zeroGradient; } cubosopra { type zeroGradient; } cubosotto { type zeroGradient; } cubosx { type zeroGradient; } inlet { type fixedValue; value \$internalField; } outlet { type inletOutlet; inletValue \$internalField; value \$internalField; } fisso { type cyclicAMI; value \$internalField; } fissosopra { type cyclicAMI; value \$internalField; } fissosotto { type cyclicAMI; value \$internalField; } volumelato { type cyclicAMI; value \$internalField; } volumesopra { type cyclicAMI; value \$internalField; } volumesotto { type cyclicAMI; value \$internalField; } pala1 { type omegaWallFunction; value \$internalField; } pala1sopra { type omegaWallFunction; value \$internalField; } pala1sotto { type omegaWallFunction; value \$internalField; } pala2 { type omegaWallFunction; value \$internalField; } pala2sopra { type omegaWallFunction; value \$internalField; } pala2sotto { type omegaWallFunction; value \$internalField; } pala3 { type omegaWallFunction; value \$internalField; } pala3sopra { type omegaWallFunction; value \$internalField; } pala3sotto { type omegaWallFunction; value \$internalField; } } // ************************************************************************* //``` U Code: ```/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.0 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volVectorField; object U; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 1 -1 0 0 0 0]; internalField uniform (0 0 0); boundaryField { cubodx { type slip; } cubosopra { type slip; } cubosotto { type slip; } cubosx { type slip; } fisso { type cyclicAMI; value \$internalField; } fissosopra { type cyclicAMI; value \$internalField; } fissosotto { type cyclicAMI; value \$internalField; } inlet { type fixedValue; value uniform (10.0 0 0); } outlet { type zeroGradient; } pala1 { type fixedValue; value \$internalField; } pala1sopra { type fixedValue; value \$internalField; } pala1sotto { type fixedValue; value \$internalField; } pala2 { type fixedValue; value \$internalField; } pala2sopra { type fixedValue; value \$internalField; } pala2sotto { type fixedValue; value \$internalField; } pala3 { type fixedValue ; value \$internalField; } pala3sopra { type fixedValue; value \$internalField; } pala3sotto { type fixedValue; value \$internalField; } volumelato { type cyclicAMI; value \$internalField; } volumesopra { type cyclicAMI; value \$internalField; } volumesotto { type cyclicAMI; value \$internalField; } } // ************************************************************************* //``` p Code: ```/*--------------------------------*- C++ -*----------------------------------*\ | ========= | | | \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | | \\ / O peration | Version: 2.3.0 | | \\ / A nd | Web: www.OpenFOAM.org | | \\/ M anipulation | | \*---------------------------------------------------------------------------*/ FoamFile { version 2.0; format ascii; class volScalarField; object p; } // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * // dimensions [0 2 -2 0 0 0 0]; internalField uniform 0; boundaryField { cubodx { type zeroGradient; } cubosopra { type zeroGradient; } cubosotto { type zeroGradient; } cubosx { type zeroGradient; } fisso { type cyclicAMI; value \$internalField; } fissosopra { type cyclicAMI; value \$internalField; } fissosotto { type cyclicAMI; value \$internalField; } inlet { type zeroGradient; } outlet { type fixedValue; value \$internalField; } pala1 { type zeroGradient; } pala1sopra { type zeroGradient; } pala1sotto { type zeroGradient; } pala2 { type zeroGradient; } pala2sopra { type zeroGradient; } pala2sotto { type zeroGradient; } pala3 { type zeroGradient; } pala3sopra { type zeroGradient; } pala3sotto { type zeroGradient; } volumelato { type cyclicAMI; value \$internalField; } volumesopra { type cyclicAMI; value \$internalField; } volumesotto { type cyclicAMI; value \$internalField; } } // ************************************************************************* //```

 February 22, 2018, 19:50 #6 Member   Join Date: Jan 2018 Location: Malaysia Posts: 58 Rep Power: 8 Hi, i am facing the same problem. May b you had found out the solution to this, do you mind to share it? thanks a lot.