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komega SST blew up after first few iterations 

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May 11, 2019, 06:36 
komega SST blew up after first few iterations

#1 
Member
Joe lee
Join Date: Nov 2018
Posts: 59
Rep Power: 3 
I am trying to model the external flow over a bike, in order to obtain the CdA. I borrowed the case from motorBike tutorial. I slightly modified the initial conditions as follows:
The initial values I used in k and omega were based on some researches, which used turbulence intensity level = 2% and eddy viscosity ratio = 0.1. Here is what I got from the log.simpleFoam: Code:
Create time Create mesh for time = 0 [AdminPC:02105] 5 more processes have sent help message helpbtlvader.txt / cmapermissiondenied [AdminPC:02105] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages SIMPLE: Convergence criteria found U: tolerance 0.0001 p: tolerance 0.0001 "(komega)": 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 kOmegaSST Selecting patchDistMethod meshWave RAS { RASModel kOmegaSST; turbulence on; printCoeffs on; alphaK1 0.85; alphaK2 1; alphaOmega1 0.5; alphaOmega2 0.856; gamma1 0.555556; gamma2 0.44; beta1 0.075; beta2 0.0828; betaStar 0.09; a1 0.31; b1 1; c1 10; F3 false; } No MRF models present No finite volume options present Starting time loop streamLine streamLines: automatic track length specified through number of sub cycles : 5 Reading surface description: yNormal forces forceCoeffs1: Not including porosity effects forceCoeffs forceCoeffs1: Not including porosity effects Time = 1 smoothSolver: Solving for Ux, Initial residual = 0.176082, Final residual = 0.0175161, No Iterations 8 smoothSolver: Solving for Uy, Initial residual = 0.0854752, Final residual = 0.0078422, No Iterations 6 smoothSolver: Solving for Uz, Initial residual = 0.0535574, Final residual = 0.00446781, No Iterations 9 GAMG: Solving for p, Initial residual = 1, Final residual = 0.00968802, No Iterations 15 time step continuity errors : sum local = 9.19838e08, global = 1.35003e09, cumulative = 1.35003e09 smoothSolver: Solving for omega, Initial residual = 0.999998, Final residual = 2.29698e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 1, Final residual = 6.96747e05, No Iterations 1 ExecutionTime = 252.73 s ClockTime = 563 s forceCoeffs forceCoeffs1 write: Cm = 0.404453 Cd = 0.754425 Cl = 0.0101646 Cl(f) = 0.399371 Cl(r) = 0.409535 Time = 2 smoothSolver: Solving for Ux, Initial residual = 0.114146, Final residual = 0.00945059, No Iterations 8 smoothSolver: Solving for Uy, Initial residual = 0.03572, Final residual = 0.0033767, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 0.268761, Final residual = 0.023381, No Iterations 8 GAMG: Solving for p, Initial residual = 0.00423399, Final residual = 3.88164e05, No Iterations 14 time step continuity errors : sum local = 7.09901e08, global = 1.05225e09, cumulative = 2.40228e09 smoothSolver: Solving for omega, Initial residual = 0.786768, Final residual = 6.02541e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.347618, Final residual = 8.09935e05, No Iterations 1 ExecutionTime = 358.52 s ClockTime = 941 s forceCoeffs forceCoeffs1 write: Cm = 0.372383 Cd = 0.710432 Cl = 0.0032843 Cl(f) = 0.370741 Cl(r) = 0.374025 Time = 3 smoothSolver: Solving for Ux, Initial residual = 0.134328, Final residual = 0.0118087, No Iterations 8 smoothSolver: Solving for Uy, Initial residual = 0.116996, Final residual = 0.0105707, No Iterations 7 smoothSolver: Solving for Uz, Initial residual = 0.0580452, Final residual = 0.00576293, No Iterations 7 GAMG: Solving for p, Initial residual = 0.00317963, Final residual = 3.03476e05, No Iterations 18 time step continuity errors : sum local = 7.20084e08, global = 7.35963e10, cumulative = 3.13824e09 smoothSolver: Solving for omega, Initial residual = 0.373588, Final residual = 9.57613e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.103448, Final residual = 8.1809e05, No Iterations 1 ExecutionTime = 509.1 s ClockTime = 1274 s forceCoeffs forceCoeffs1 write: Cm = 0.28686 Cd = 0.550375 Cl = 0.0178247 Cl(f) = 0.295772 Cl(r) = 0.277947 Time = 4 smoothSolver: Solving for Ux, Initial residual = 0.581453, Final residual = 0.0506933, No Iterations 7 smoothSolver: Solving for Uy, Initial residual = 0.438063, Final residual = 0.0375534, No Iterations 14 smoothSolver: Solving for Uz, Initial residual = 0.28364, Final residual = 0.0228554, No Iterations 19 GAMG: Solving for p, Initial residual = 0.100663, Final residual = 0.000964993, No Iterations 24 time step continuity errors : sum local = 2.71584e06, global = 6.86095e08, cumulative = 6.54713e08 smoothSolver: Solving for omega, Initial residual = 0.156237, Final residual = 0.000151387, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.0248487, Final residual = 9.03384e05, No Iterations 1 ExecutionTime = 625.86 s ClockTime = 1558 s forceCoeffs forceCoeffs1 write: Cm = 2.36372 Cd = 5.23947 Cl = 45.4406 Cl(f) = 25.084 Cl(r) = 20.3566 Time = 5 smoothSolver: Solving for Ux, Initial residual = 0.748694, Final residual = 0.0654467, No Iterations 6 smoothSolver: Solving for Uy, Initial residual = 0.707975, Final residual = 0.0671149, No Iterations 10 smoothSolver: Solving for Uz, Initial residual = 0.645301, Final residual = 0.0580618, No Iterations 11 GAMG: Solving for p, Initial residual = 0.331992, Final residual = 0.00325251, No Iterations 29 time step continuity errors : sum local = 4.57856e05, global = 1.35323e06, cumulative = 1.28776e06 smoothSolver: Solving for omega, Initial residual = 0.0619606, Final residual = 0.000791318, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.00576973, Final residual = 0.000313824, No Iterations 2 ExecutionTime = 753.75 s ClockTime = 1825 s forceCoeffs forceCoeffs1 write: Cm = 48393.6 Cd = 355643 Cl = 193536 Cl(f) = 48374.2 Cl(r) = 145161 Time = 6 smoothSolver: Solving for Ux, Initial residual = 0.77583, Final residual = 0.0469625, No Iterations 11 smoothSolver: Solving for Uy, Initial residual = 0.647136, Final residual = 0.0587523, No Iterations 9 smoothSolver: Solving for Uz, Initial residual = 0.801675, Final residual = 0.0450629, No Iterations 11 GAMG: Solving for p, Initial residual = 2.42318e05, Final residual = 2.34325e07, No Iterations 43 time step continuity errors : sum local = 0.000116095, global = 5.64454e06, cumulative = 6.9323e06 smoothSolver: Solving for omega, Initial residual = 0.0295412, Final residual = 0.00216916, No Iterations 2 smoothSolver: Solving for k, Initial residual = 0.00243104, Final residual = 0.000230323, No Iterations 3 ExecutionTime = 908.36 s ClockTime = 2133 s forceCoeffs forceCoeffs1 write: Cm = 735398 Cd = 1.66962e+06 Cl = 1.74826e+07 Cl(f) = 9.47672e+06 Cl(r) = 8.00593e+06 Time = 7 smoothSolver: Solving for Ux, Initial residual = 0.577761, Final residual = 0.0517967, No Iterations 47 smoothSolver: Solving for Uy, Initial residual = 0.570563, Final residual = 0.0531017, No Iterations 47 smoothSolver: Solving for Uz, Initial residual = 0.546372, Final residual = 0.0538754, No Iterations 36 GAMG: Solving for p, Initial residual = 0.0134, Final residual = 0.0431707, No Iterations 1000 time step continuity errors : sum local = 500.302, global = 256.052, cumulative = 256.052 smoothSolver: Solving for omega, Initial residual = 0.726855, Final residual = 0.0688681, No Iterations 4 smoothSolver: Solving for k, Initial residual = 0.053017, Final residual = 0.00485332, No Iterations 4 ExecutionTime = 2723 s ClockTime = 4119 s forceCoeffs forceCoeffs1 write: Cm = 1.42517e+06 Cd = 7.85747e+06 Cl = 2.46218e+07 Cl(f) = 1.08857e+07 Cl(r) = 1.37361e+07 Time = 8 smoothSolver: Solving for Ux, Initial residual = 0.612081, Final residual = 0.0499664, No Iterations 29 smoothSolver: Solving for Uy, Initial residual = 0.562296, Final residual = 0.0483684, No Iterations 28 smoothSolver: Solving for Uz, Initial residual = 0.628358, Final residual = 0.0614706, No Iterations 14 GAMG: Solving for p, Initial residual = 0.999964, Final residual = 0.0500564, No Iterations 1000 time step continuity errors : sum local = 1.61271e+08, global = 40286.8, cumulative = 40542.9 smoothSolver: Solving for omega, Initial residual = 0.00412419, Final residual = 0.000290188, No Iterations 4 smoothSolver: Solving for k, Initial residual = 0.00274375, Final residual = 0.000233623, No Iterations 5 ExecutionTime = 4529.61 s ClockTime = 6088 s forceCoeffs forceCoeffs1 write: Cm = 6.60893e+13 Cd = 5.13466e+14 Cl = 1.211e+14 Cl(f) = 5.53934e+12 Cl(r) = 1.26639e+14 Time = 9 smoothSolver: Solving for Ux, Initial residual = 0.804576, Final residual = 13.5575, No Iterations 1000 smoothSolver: Solving for Uy, Initial residual = 0.785135, Final residual = 82.7634, No Iterations 1000 smoothSolver: Solving for Uz, Initial residual = 0.874744, Final residual = 9.53614, No Iterations 1000  Primary job terminated normally, but 1 process returned a nonzero exit code.. Per userdirection, the job has been aborted.   mpirun detected that one or more processes exited with nonzero status, thus causing the job to be terminated. The first process to do so was: Process name: [[12118,1],0] Exit code: 145  snappyHexMeshDict: Code:
castellatedMesh true; snap true; addLayers true; { figure { type triSurfaceMesh; file "figure.stl"; } refinementBox { type searchableBox; min ( 750 0 1000); max ( 1830 2685 2640); } }; castellatedMeshControls { maxLocalCells 1000000; maxGlobalCells 30000000; minRefinementCells 15; maxLoadUnbalance 0.15; nCellsBetweenLevels 3; features ( { file "figure.eMesh"; level 7; } ); refinementSurfaces { figure { level (7 7); patchInfo { type wall; inGroups (figureGroup); } } } resolveFeatureAngle 20; refinementRegions { refinementBox { mode inside; levels ((1E15 4)); } figure { mode distance; levels ( (2 8) (10 6) ); } } locationInMesh (402.1 1802 1002.7) ; allowFreeStandingZoneFaces true; } snapControls { nSmoothPatch 5; tolerance 2.25; nSolveIter 30; nRelaxIter 5; nFeatureSnapIter 10; implicitFeatureSnap false; explicitFeatureSnap true; multiRegionFeatureSnap false; } addLayersControls { relativeSizes true; layers { "(lowerWallfigure).*" { nSurfaceLayers 10; } } expansionRatio 1.2; thickness 0.8; minThickness 0.0001; nGrow 0; featureAngle 180; slipFeatureAngle 30; nRelaxIter 5; nSmoothSurfaceNormals 1; nSmoothNormals 3; nSmoothThickness 10; maxFaceThicknessRatio 0.6; maxThicknessToMedialRatio 0.3; minMedianAxisAngle 90; nBufferCellsNoExtrude 0; nLayerIter 15; } meshQualityControls { #include "meshQualityDict" } writeFlags ( scalarLevels layerSets layerFields ); mergeTolerance 1e6; Code:
ddtSchemes { default steadyState; } gradSchemes { default Gauss linear; grad(U) cellLimited Gauss linear 1; } divSchemes { default none; div(phi,U) bounded Gauss linearUpwindV grad(U); div(phi,k) bounded Gauss upwind; div(phi,omega) bounded Gauss upwind; div((nuEff*dev2(T(grad(U))))) Gauss linear; } laplacianSchemes { default Gauss linear corrected; } interpolationSchemes { default linear; } snGradSchemes { default corrected; } wallDist { method meshWave; } Code:
solvers { p { solver GAMG; smoother GaussSeidel; tolerance 1e7; relTol 0.01; } Phi { $p; } U { solver smoothSolver; smoother GaussSeidel; tolerance 1e8; relTol 0.1; nSweeps 1; } k { solver smoothSolver; smoother GaussSeidel; tolerance 1e8; relTol 0.1; nSweeps 1; } omega { solver smoothSolver; smoother GaussSeidel; tolerance 1e8; relTol 0.1; nSweeps 1; } } SIMPLE { nNonOrthogonalCorrectors 0; consistent yes; residualControl { U 1e4; p 1e4; "(komega)" 1e4; } } potentialFlow { nNonOrthogonalCorrectors 10; } relaxationFactors { equations { U 0.9; k 0.7; omega 0.7; } } cache { grad(U); } 

May 11, 2019, 15:23 

#2 
Senior Member
Join Date: Jan 2014
Posts: 164
Rep Power: 8 
I guess this is a highly non Orthogonal mesh  can be found in checkMesh log File
I recommend following settings: nNonOrthogonalCorrectors 3; Pressure equation is diverging, therefore set: relaxationFactors of pressure p 0.3, U 0.7 and turbulence variables 0.3 Set consistent to no in the Simple Dict If this is not running and your mesh is OK something is wrong with your BCs 

May 12, 2019, 02:40 

#3  
Member
Joe lee
Join Date: Nov 2018
Posts: 59
Rep Power: 3 
Quote:
Code:
Create mesh for time = 0 [AdminPC:07679] 5 more processes have sent help message helpbtlvader.txt / cmapermissiondenied [AdminPC:07679] Set MCA parameter "orte_base_help_aggregate" to 0 to see all help / error messages SIMPLE: Convergence criteria found U: tolerance 0.0001 p: tolerance 0.0001 "(komega)": 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 kOmegaSST Selecting patchDistMethod meshWave RAS { RASModel kOmegaSST; turbulence on; printCoeffs on; alphaK1 0.85; alphaK2 1; alphaOmega1 0.5; alphaOmega2 0.856; gamma1 0.555556; gamma2 0.44; beta1 0.075; beta2 0.0828; betaStar 0.09; a1 0.31; b1 1; c1 10; F3 false; } No MRF models present No finite volume options present Starting time loop streamLine streamLines: automatic track length specified through number of sub cycles : 5 Reading surface description: yNormal forces forceCoeffs1: Not including porosity effects forceCoeffs forceCoeffs1: Not including porosity effects Time = 1 smoothSolver: Solving for Ux, Initial residual = 0.0456653, Final residual = 0.00423798, No Iterations 3 smoothSolver: Solving for Uy, Initial residual = 0.0288288, Final residual = 0.00174395, No Iterations 3 smoothSolver: Solving for Uz, Initial residual = 0.015543, Final residual = 0.000777086, No Iterations 4 GAMG: Solving for p, Initial residual = 1, Final residual = 0.00897626, No Iterations 12 GAMG: Solving for p, Initial residual = 0.00258742, Final residual = 2.44815e05, No Iterations 9 GAMG: Solving for p, Initial residual = 0.000234184, Final residual = 2.20371e06, No Iterations 28 GAMG: Solving for p, Initial residual = 3.7742e05, Final residual = 3.56882e07, No Iterations 28 time step continuity errors : sum local = 2.33207e10, global = 1.31804e11, cumulative = 1.31804e11 smoothSolver: Solving for omega, Initial residual = 0.0432445, Final residual = 6.84685e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 1, Final residual = 0.00190103, No Iterations 1 ExecutionTime = 303.55 s ClockTime = 544 s forceCoeffs forceCoeffs1 write: Cm = 0.795466 Cd = 1.52038 Cl = 0.00376598 Cl(f) = 0.793583 Cl(r) = 0.797349 Time = 2 smoothSolver: Solving for Ux, Initial residual = 0.0616887, Final residual = 0.00374667, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.0243984, Final residual = 0.00133365, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.028181, Final residual = 0.00171954, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0119031, Final residual = 0.000116838, No Iterations 12 GAMG: Solving for p, Initial residual = 0.00487985, Final residual = 4.76482e05, No Iterations 9 GAMG: Solving for p, Initial residual = 0.000448644, Final residual = 4.26444e06, No Iterations 26 GAMG: Solving for p, Initial residual = 7.1785e05, Final residual = 6.86387e07, No Iterations 27 time step continuity errors : sum local = 4.649e10, global = 3.29865e11, cumulative = 1.98061e11 smoothSolver: Solving for omega, Initial residual = 0.0232035, Final residual = 5.38076e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.24792, Final residual = 0.000678387, No Iterations 1 ExecutionTime = 505.78 s ClockTime = 863 s forceCoeffs forceCoeffs1 write: Cm = 2.58056 Cd = 4.90158 Cl = 0.0861271 Cl(f) = 2.5375 Cl(r) = 2.62362 Time = 3 smoothSolver: Solving for Ux, Initial residual = 0.125752, Final residual = 0.00786615, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.040605, Final residual = 0.00248977, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.0650774, Final residual = 0.00419616, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0235075, Final residual = 0.000216227, No Iterations 12 GAMG: Solving for p, Initial residual = 0.00310908, Final residual = 2.99842e05, No Iterations 9 GAMG: Solving for p, Initial residual = 0.000296906, Final residual = 2.87985e06, No Iterations 24 GAMG: Solving for p, Initial residual = 4.76489e05, Final residual = 4.60334e07, No Iterations 26 time step continuity errors : sum local = 9.14815e10, global = 7.63309e11, cumulative = 5.65248e11 smoothSolver: Solving for omega, Initial residual = 0.0130879, Final residual = 4.40088e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.115244, Final residual = 0.000442352, No Iterations 1 ExecutionTime = 711.59 s ClockTime = 1235 s forceCoeffs forceCoeffs1 write: Cm = 7.08031 Cd = 13.1402 Cl = 0.259661 Cl(f) = 6.95048 Cl(r) = 7.21014 Time = 4 smoothSolver: Solving for Ux, Initial residual = 0.214588, Final residual = 0.0133585, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.0770733, Final residual = 0.00473664, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.195012, Final residual = 0.0124302, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0177483, Final residual = 0.000176726, No Iterations 11 GAMG: Solving for p, Initial residual = 0.00386416, Final residual = 3.5565e05, No Iterations 10 GAMG: Solving for p, Initial residual = 0.000371768, Final residual = 3.54374e06, No Iterations 23 GAMG: Solving for p, Initial residual = 5.95072e05, Final residual = 5.70419e07, No Iterations 25 time step continuity errors : sum local = 1.84151e09, global = 1.82247e10, cumulative = 1.25722e10 smoothSolver: Solving for omega, Initial residual = 0.00788961, Final residual = 3.74303e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.0656286, Final residual = 0.000343864, No Iterations 1 ExecutionTime = 914.35 s ClockTime = 1576 s forceCoeffs forceCoeffs1 write: Cm = 16.2509 Cd = 29.4589 Cl = 0.694666 Cl(f) = 15.9036 Cl(r) = 16.5982 Time = 5 smoothSolver: Solving for Ux, Initial residual = 0.420152, Final residual = 0.025847, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.151328, Final residual = 0.00917183, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.724336, Final residual = 0.0454167, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0234195, Final residual = 0.000228815, No Iterations 11 GAMG: Solving for p, Initial residual = 0.00359141, Final residual = 3.28205e05, No Iterations 10 GAMG: Solving for p, Initial residual = 0.000347374, Final residual = 3.42699e06, No Iterations 22 GAMG: Solving for p, Initial residual = 5.55193e05, Final residual = 5.18951e07, No Iterations 25 time step continuity errors : sum local = 3.52172e09, global = 2.49334e10, cumulative = 1.23612e10 smoothSolver: Solving for omega, Initial residual = 0.00504652, Final residual = 3.29567e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.0413384, Final residual = 0.000287633, No Iterations 1 ExecutionTime = 1117.53 s ClockTime = 1934 s forceCoeffs forceCoeffs1 write: Cm = 35.4112 Cd = 62.5706 Cl = 1.46642 Cl(f) = 34.678 Cl(r) = 36.1444 Time = 6 smoothSolver: Solving for Ux, Initial residual = 0.540335, Final residual = 0.0328771, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.256176, Final residual = 0.0151566, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.749173, Final residual = 0.0459364, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0232613, Final residual = 0.000211777, No Iterations 11 GAMG: Solving for p, Initial residual = 0.00378945, Final residual = 3.54794e05, No Iterations 10 GAMG: Solving for p, Initial residual = 0.00036875, Final residual = 3.59724e06, No Iterations 22 GAMG: Solving for p, Initial residual = 5.9962e05, Final residual = 5.69627e07, No Iterations 24 time step continuity errors : sum local = 6.98985e09, global = 4.32232e10, cumulative = 3.08621e10 smoothSolver: Solving for omega, Initial residual = 0.00338321, Final residual = 3.0473e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.0277725, Final residual = 0.000250897, No Iterations 1 ExecutionTime = 1308.15 s ClockTime = 2280 s forceCoeffs forceCoeffs1 write: Cm = 73.1295 Cd = 126.245 Cl = 2.56818 Cl(f) = 71.8454 Cl(r) = 74.4136 Time = 7 smoothSolver: Solving for Ux, Initial residual = 0.752046, Final residual = 0.0448627, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.430047, Final residual = 0.0249392, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.551617, Final residual = 0.0336876, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0269677, Final residual = 0.000232386, No Iterations 11 GAMG: Solving for p, Initial residual = 0.00380056, Final residual = 3.53977e05, No Iterations 10 GAMG: Solving for p, Initial residual = 0.00037507, Final residual = 3.55969e06, No Iterations 22 GAMG: Solving for p, Initial residual = 6.14032e05, Final residual = 5.99133e07, No Iterations 23 time step continuity errors : sum local = 1.41695e08, global = 6.52369e10, cumulative = 3.43748e10 smoothSolver: Solving for omega, Initial residual = 0.00234028, Final residual = 3.02726e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.0194432, Final residual = 0.000227259, No Iterations 1 ExecutionTime = 1491.96 s ClockTime = 2579 s forceCoeffs forceCoeffs1 write: Cm = 146.466 Cd = 247.633 Cl = 3.05498 Cl(f) = 144.938 Cl(r) = 147.993 Time = 8 smoothSolver: Solving for Ux, Initial residual = 0.776731, Final residual = 0.0455646, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.558656, Final residual = 0.031481, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.653407, Final residual = 0.0383689, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0259683, Final residual = 0.000237545, No Iterations 11 GAMG: Solving for p, Initial residual = 0.00340573, Final residual = 3.29827e05, No Iterations 11 GAMG: Solving for p, Initial residual = 0.000344274, Final residual = 3.43903e06, No Iterations 22 GAMG: Solving for p, Initial residual = 5.87626e05, Final residual = 5.69208e07, No Iterations 23 time step continuity errors : sum local = 2.49218e08, global = 6.18566e10, cumulative = 9.62314e10 smoothSolver: Solving for omega, Initial residual = 0.00167082, Final residual = 3.52362e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.0139952, Final residual = 0.00021044, No Iterations 1 ExecutionTime = 1673.7 s ClockTime = 2865 s forceCoeffs forceCoeffs1 write: Cm = 287.239 Cd = 477.46 Cl = 2.13309 Cl(f) = 286.173 Cl(r) = 288.306 Time = 9 smoothSolver: Solving for Ux, Initial residual = 0.846681, Final residual = 0.0493988, No Iterations 4 smoothSolver: Solving for Uy, Initial residual = 0.717908, Final residual = 0.0404963, No Iterations 4 smoothSolver: Solving for Uz, Initial residual = 0.793609, Final residual = 0.0459932, No Iterations 4 GAMG: Solving for p, Initial residual = 0.0262227, Final residual = 0.000249765, No Iterations 11 GAMG: Solving for p, Initial residual = 0.00303599, Final residual = 3.00778e05, No Iterations 12 GAMG: Solving for p, Initial residual = 0.000305505, Final residual = 2.83807e06, No Iterations 25 GAMG: Solving for p, Initial residual = 5.17231e05, Final residual = 5.14271e07, No Iterations 24 time step continuity errors : sum local = 4.23329e08, global = 4.095e09, cumulative = 3.13269e09 smoothSolver: Solving for omega, Initial residual = 0.00125448, Final residual = 4.59583e05, No Iterations 1 smoothSolver: Solving for k, Initial residual = 0.0103348, Final residual = 0.000213194, No Iterations 1 ExecutionTime = 1859.81 s ClockTime = 3174 s regIOobject::readIfModified() : Rereading object controlDict from file "/home/taeioum/OpenFOAM/taeioumdev/run/pos/pos11/system/controlDict" forceCoeffs forceCoeffs1 write: Cm = 547.583 Cd = 900.165 Cl = 2.90921 Cl(f) = 549.038 Cl(r) = 546.129 End Finalising parallel run Code:
Checking topology... Boundary definition OK. Cell to face addressing OK. Point usage OK. Upper triangular ordering OK. Face vertices OK. Number of regions: 1 (OK). Checking patch topology for multiply connected surfaces... Patch Faces Points Surface topology frontAndBack 4300 4524 ok (nonclosed singly connected) inlet 750 806 ok (nonclosed singly connected) outlet 750 806 ok (nonclosed singly connected) lowerWall 2580 2697 ok (nonclosed singly connected) upperWall 2580 2697 ok (nonclosed singly connected) Checking geometry... Overall domain bounding box (5535 7.4607e14 8190) (6615 10100 26216) Mesh has 3 geometric (nonempty/wedge) directions (1 1 1) Mesh has 3 solution (nonempty) directions (1 1 1) Boundary openness (1.50014e15 1.26354e14 9.2466e17) OK. Max cell openness = 2.17924e15 OK. Max aspect ratio = 108.81 OK. Minimum face area = 0.00157481. Maximum face area = 173726. Face area magnitudes OK. Min volume = 0.0160548. Max volume = 6.74569e+07. Total volume = 4.22204e+12. Cell volumes OK. Mesh nonorthogonality Max: 64.9971 average: 8.1902 Nonorthogonality check OK. Face pyramids OK. ***Max skewness = 5.20766, 1 highly skew faces detected which may impair the quality of the results <<Writing 1 skew faces to set skewFaces Coupled point location match (average 0) OK. Failed 1 mesh checks. 

May 12, 2019, 09:38 

#4 
Senior Member
Join Date: Jan 2014
Posts: 164
Rep Power: 8 
Can you somewhere upload your case...I could have a quick look


May 12, 2019, 11:51 

#5 
Member
Joe lee
Join Date: Nov 2018
Posts: 59
Rep Power: 3 
Sure. I will put it in google drive:
https://drive.google.com/file/d/1mV...ew?usp=sharing Thank you very much. 

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komega sst, motorbike tutorial, simplefoam 
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