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Orifice Plate with a fully developed flow - Problems with convergence |
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June 3, 2011, 18:50 |
Orifice Plate with a fully developed flow - Problems with convergence
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Jonathas Assunção de Castro
Join Date: Mar 2009
Posts: 11
Rep Power: 17 |
Hy .... i'm trying to simulate the pressure drop caused by the obstruction in a orifice plate. So i generated a duct upstream the obstruction with the purpose of obtaining a fully developed flow before the hole.
However simpleFoam doesn't converge. Please, help me. My term is ending and I still did not achieve satisfactory results. My turbulence model is kepsilon. CheckMesh is OK. My Re is 10000. ------------------------------------------------------------------------------------------------------------------------------------ Here my fvSchemes Code:
ddtSchemes { default steadyState; } gradSchemes { default Gauss linear; grad(p) Gauss linear; grad(U) Gauss linear; } divSchemes { default none; div(phi,U) Gauss upwind; div(phi,k) Gauss upwind; div(phi,epsilon) Gauss upwind; div(phi,R) Gauss upwind; div(R) Gauss linear; div(phi,nuTilda) Gauss upwind; div((nuEff*dev(grad(U).T()))) Gauss linear; } laplacianSchemes { default none; laplacian(nuEff,U) Gauss linear corrected; laplacian((1|A(U)),p) Gauss linear corrected; laplacian(DkEff,k) Gauss linear corrected; laplacian(DepsilonEff,epsilon) Gauss linear corrected; laplacian(DREff,R) Gauss linear corrected; laplacian(DnuTildaEff,nuTilda) Gauss linear corrected; } interpolationSchemes { default linear; interpolate(U) linear; } snGradSchemes { default corrected; } fluxRequired { default no; p; } Now my fvSolution Code:
solvers { p PCG { preconditioner DIC; tolerance 1e-06; relTol 0.01; }; U PBiCG { preconditioner DILU; tolerance 1e-05; relTol 0.1; }; k PBiCG { preconditioner DILU; tolerance 1e-05; relTol 0.1; }; epsilon PBiCG { preconditioner DILU; tolerance 1e-05; relTol 0.1; }; R PBiCG { preconditioner DILU; tolerance 1e-05; relTol 0.1; }; nuTilda PBiCG { preconditioner DILU; tolerance 1e-05; relTol 0.1; }; } SIMPLE { nNonOrthogonalCorrectors 0; pRefCell 0; pRefValue 0; } relaxationFactors { p 0.3; U 0.75; k 0.7; epsilon 0.7; R 0.7; nuTilda 0.7; } Time 0 for U Code:
inlet { type fixedValue; value uniform (0 0 3); } wall { type fixedValue; value uniform (0 0 0); } simetria { type symmetryPlane; } outlet { type zeroGradient; } Time 0 for p Code:
inlet { type zeroGradient; } wall { type zeroGradient; } simetria { type symmetryPlane; } outlet { type fixedValue; value uniform 0; } Code:
Time = 456 DILUPBiCG: Solving for Ux, Initial residual = 0.000512103, Final residual = 1.48703e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000401474, Final residual = 1.10876e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 4.50922e-05, Final residual = 1.18828e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00228803, Final residual = 2.27407e-05, No Iterations 164 time step continuity errors : sum local = 0.00238667, global = -6.0628e-05, cumulative = -0.127041 DILUPBiCG: Solving for epsilon, Initial residual = 0.000388629, Final residual = 4.27324e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00396427, Final residual = 3.75563e-05, No Iterations 2 ExecutionTime = 7063.29 s ClockTime = 7079 s Time = 457 DILUPBiCG: Solving for Ux, Initial residual = 0.00050372, Final residual = 1.48732e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000393417, Final residual = 1.0608e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 5.00215e-05, Final residual = 1.27123e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00226589, Final residual = 2.24865e-05, No Iterations 163 time step continuity errors : sum local = 0.00235924, global = -0.000164009, cumulative = -0.127205 DILUPBiCG: Solving for epsilon, Initial residual = 0.000388612, Final residual = 4.25304e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00397533, Final residual = 3.7655e-05, No Iterations 2 ExecutionTime = 7073.22 s ClockTime = 7089 s Time = 458 DILUPBiCG: Solving for Ux, Initial residual = 0.000504411, Final residual = 1.47415e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000394789, Final residual = 1.04873e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 6.91581e-05, Final residual = 1.54967e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00224121, Final residual = 2.08246e-05, No Iterations 755 time step continuity errors : sum local = 0.00218417, global = 2.1535e-06, cumulative = -0.127203 DILUPBiCG: Solving for epsilon, Initial residual = 0.000388532, Final residual = 4.2453e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00398655, Final residual = 3.77526e-05, No Iterations 2 ExecutionTime = 7102.86 s ClockTime = 7119 s Time = 459 DILUPBiCG: Solving for Ux, Initial residual = 0.000517339, Final residual = 1.54808e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000410883, Final residual = 1.0981e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 6.09888e-05, Final residual = 1.6352e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00229398, Final residual = 2.18083e-05, No Iterations 179 time step continuity errors : sum local = 0.00229149, global = -5.6239e-05, cumulative = -0.127259 DILUPBiCG: Solving for epsilon, Initial residual = 0.000389129, Final residual = 4.23547e-06, No Iterations 2 bounding epsilon, min: -0.178234 max: 364036 average: 10221.9 DILUPBiCG: Solving for k, Initial residual = 0.00399978, Final residual = 3.78724e-05, No Iterations 2 ExecutionTime = 7113.5 s ClockTime = 7130 s Time = 460 DILUPBiCG: Solving for Ux, Initial residual = 0.000483808, Final residual = 1.44835e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000380046, Final residual = 1.13412e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 4.13029e-05, Final residual = 1.19397e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00227407, Final residual = 2.21498e-05, No Iterations 89 time step continuity errors : sum local = 0.00232672, global = 5.68528e-05, cumulative = -0.127202 DILUPBiCG: Solving for epsilon, Initial residual = 0.000389398, Final residual = 4.23249e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00401211, Final residual = 3.79844e-05, No Iterations 2 ExecutionTime = 7120.94 s ClockTime = 7137 s Time = 461 DILUPBiCG: Solving for Ux, Initial residual = 0.00048556, Final residual = 1.45664e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000381206, Final residual = 1.11524e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 4.07961e-05, Final residual = 1.169e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00225496, Final residual = 2.21822e-05, No Iterations 245 time step continuity errors : sum local = 0.00232942, global = 6.41572e-06, cumulative = -0.127196 DILUPBiCG: Solving for epsilon, Initial residual = 0.000389578, Final residual = 4.22086e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00402382, Final residual = 3.80896e-05, No Iterations 2 ExecutionTime = 7133.82 s ClockTime = 7150 s Time = 462 DILUPBiCG: Solving for Ux, Initial residual = 0.000498512, Final residual = 1.45726e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000391302, Final residual = 1.0683e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 5.1133e-05, Final residual = 1.2756e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00224598, Final residual = 2.19644e-05, No Iterations 332 time step continuity errors : sum local = 0.00230557, global = -4.69691e-05, cumulative = -0.127242 DILUPBiCG: Solving for epsilon, Initial residual = 0.000389523, Final residual = 4.20593e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00403516, Final residual = 3.81893e-05, No Iterations 2 ExecutionTime = 7149.37 s ClockTime = 7165 s Time = 463 DILUPBiCG: Solving for Ux, Initial residual = 0.000508548, Final residual = 1.4678e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000398041, Final residual = 1.05333e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 6.0973e-05, Final residual = 1.43804e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00222826, Final residual = 2.12836e-05, No Iterations 99 time step continuity errors : sum local = 0.00223302, global = -0.000169687, cumulative = -0.127412 DILUPBiCG: Solving for epsilon, Initial residual = 0.000389354, Final residual = 4.18671e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00404604, Final residual = 3.82852e-05, No Iterations 2 ExecutionTime = 7157.2 s ClockTime = 7173 s Time = 464 DILUPBiCG: Solving for Ux, Initial residual = 0.000509481, Final residual = 1.44912e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000397803, Final residual = 1.04437e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 7.94906e-05, Final residual = 1.70902e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.0022065, Final residual = 2.19899e-05, No Iterations 622 time step continuity errors : sum local = 0.0023064, global = 6.12007e-06, cumulative = -0.127406 DILUPBiCG: Solving for epsilon, Initial residual = 0.000389208, Final residual = 4.17798e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00405747, Final residual = 3.8384e-05, No Iterations 2 ExecutionTime = 7182.9 s ClockTime = 7199 s Time = 492 DILUPBiCG: Solving for Ux, Initial residual = 0.000463906, Final residual = 1.2439e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000364687, Final residual = 9.88269e-06, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 4.63961e-05, Final residual = 1.13945e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00209672, Final residual = 2.01067e-05, No Iterations 753 time step continuity errors : sum local = 0.00211535, global = -1.14803e-06, cumulative = -0.127467 DILUPBiCG: Solving for epsilon, Initial residual = 0.000393129, Final residual = 3.98323e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00440507, Final residual = 4.15127e-05, No Iterations 2 ExecutionTime = 7625.11 s ClockTime = 7642 s Time = 493 DILUPBiCG: Solving for Ux, Initial residual = 0.000485382, Final residual = 1.26639e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000382994, Final residual = 2.55656e-05, No Iterations 3 DILUPBiCG: Solving for Uz, Initial residual = 7.7196e-05, Final residual = 1.9067e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00216746, Final residual = 2.16433e-05, No Iterations 24 time step continuity errors : sum local = 0.00228078, global = 5.59411e-05, cumulative = -0.127411 DILUPBiCG: Solving for epsilon, Initial residual = 0.000393817, Final residual = 3.99394e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00442006, Final residual = 4.1653e-05, No Iterations 2 ExecutionTime = 7630.39 s ClockTime = 7647 s Time = 494 DILUPBiCG: Solving for Ux, Initial residual = 0.000454229, Final residual = 1.35997e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000355828, Final residual = 1.68204e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 4.73086e-05, Final residual = 1.32974e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00214212, Final residual = 2.09423e-05, No Iterations 131 time step continuity errors : sum local = 0.00220641, global = 0.000105288, cumulative = -0.127306 DILUPBiCG: Solving for epsilon, Initial residual = 0.00039425, Final residual = 3.9975e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00443389, Final residual = 4.17823e-05, No Iterations 2 ExecutionTime = 7638.92 s ClockTime = 7656 s Time = 495 DILUPBiCG: Solving for Ux, Initial residual = 0.000453295, Final residual = 1.3394e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000356429, Final residual = 9.5217e-06, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 3.69828e-05, Final residual = 1.10254e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00212543, Final residual = 2.08334e-05, No Iterations 340 time step continuity errors : sum local = 0.00219434, global = 8.02239e-05, cumulative = -0.127226 DILUPBiCG: Solving for epsilon, Initial residual = 0.00039448, Final residual = 3.99306e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00444701, Final residual = 4.19023e-05, No Iterations 2 ExecutionTime = 7653.89 s ClockTime = 7671 s Time = 496 DILUPBiCG: Solving for Ux, Initial residual = 0.000470975, Final residual = 1.31057e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000368262, Final residual = 9.95087e-06, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 3.66406e-05, Final residual = 1.02858e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00211582, Final residual = 2.01015e-05, No Iterations 18 time step continuity errors : sum local = 0.00211615, global = 7.15807e-05, cumulative = -0.127154 DILUPBiCG: Solving for epsilon, Initial residual = 0.0003944, Final residual = 3.98107e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00445943, Final residual = 4.20142e-05, No Iterations 2 ExecutionTime = 7658.79 s ClockTime = 7676 s Time = 497 DILUPBiCG: Solving for Ux, Initial residual = 0.000469239, Final residual = 1.27665e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000365393, Final residual = 1.34082e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 5.0851e-05, Final residual = 1.24694e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00209146, Final residual = 2.08967e-05, No Iterations 154 time step continuity errors : sum local = 0.00219931, global = -5.47e-05, cumulative = -0.127209 DILUPBiCG: Solving for epsilon, Initial residual = 0.000394246, Final residual = 3.96901e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00447105, Final residual = 4.21189e-05, No Iterations 2 ExecutionTime = 7668.1 s ClockTime = 7685 s Time = 498 DILUPBiCG: Solving for Ux, Initial residual = 0.000474228, Final residual = 1.27292e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000369804, Final residual = 1.17542e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 7.23045e-05, Final residual = 1.57116e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.0020701, Final residual = 2.01235e-05, No Iterations 63 time step continuity errors : sum local = 0.00211732, global = -0.00012504, cumulative = -0.127334 DILUPBiCG: Solving for epsilon, Initial residual = 0.000393942, Final residual = 3.95612e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00448192, Final residual = 4.22152e-05, No Iterations 2 ExecutionTime = 7674.4 s ClockTime = 7691 s Time = 499 DILUPBiCG: Solving for Ux, Initial residual = 0.00047692, Final residual = 1.27242e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000371529, Final residual = 1.15432e-05, No Iterations 2 DILUPBiCG: Solving for Uz, Initial residual = 9.53324e-05, Final residual = 1.94679e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00204754, Final residual = 1.80723e-05, No Iterations 730 time step continuity errors : sum local = 0.00190096, global = -2.64022e-07, cumulative = -0.127334 DILUPBiCG: Solving for epsilon, Initial residual = 0.000393712, Final residual = 3.94621e-06, No Iterations 2 bounding epsilon, min: -0.314136 max: 372313 average: 10397.8 DILUPBiCG: Solving for k, Initial residual = 0.00449351, Final residual = 4.23151e-05, No Iterations 2 ExecutionTime = 7701.85 s ClockTime = 7719 s Time = 500 DILUPBiCG: Solving for Ux, Initial residual = 0.000511951, Final residual = 1.3066e-05, No Iterations 2 DILUPBiCG: Solving for Uy, Initial residual = 0.000407941, Final residual = 1.0782e-05, No Iterations 3 DILUPBiCG: Solving for Uz, Initial residual = 7.41097e-05, Final residual = 1.99966e-06, No Iterations 2 DICPCG: Solving for p, Initial residual = 0.00213221, Final residual = 2.02643e-05, No Iterations 16 time step continuity errors : sum local = 0.00213662, global = -1.03452e-05, cumulative = -0.127344 DILUPBiCG: Solving for epsilon, Initial residual = 0.000394417, Final residual = 3.95603e-06, No Iterations 2 DILUPBiCG: Solving for k, Initial residual = 0.00450856, Final residual = 4.24534e-05, No Iterations 2 ExecutionTime = 7710.26 s ClockTime = 7727 s Last edited by jonmec; June 3, 2011 at 19:05. Reason: Complementation |
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Tags |
convergence issues, orifice plate, simplefoam |
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