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New Member
Tommy V
Join Date: Nov 2013
Posts: 29
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Hi Foamers. I need a turbulent mass flow inlet for a time varying flow rate.
I tried to apply the following BC for a U profile (Solver:twoLiquidMixingFoam). in { type turbulentInlet; fluctuationScale (0.02 0.01 0.01); referenceField flowRateInletVelocity; massFlowRate table ( ( 0.0000000e+001 0.0000000e+000 ) ( 0.0100000e+001 5.2890505e-003 ) ( 0.050000e+001 1.0507891e-001 ) ( 0.1030000e+001 1.5657144 ) ( 0.2040000e+001 2.5737434 ) ( 0.30000e+001 3.5749383 ) ); rho phase1; rhoInlet 842.346; } No errors are generated starting the simulation, but seems as the inlet field does not feel the perturbation. Hierarchical errors? In addiction I discover that using the csv data input as shown in the following BC in { type flowRateInletVelocity; massFlowRate csvFile; csvFileCoeffs { fileName "FlowRate2.dat"; outOfBounds clamp; hasHeaderLine false; refColumn 0; componentColumns (1); } rho phase1; rhoInlet 842.346; } The simulation has no problem to start on 1 processor, Reading g Reading field p_rgh Reading field U Reading/calculating face flux field phi AMI: Creating addressing and weights between 204 source faces and 204 target faces AMI: Patch source weights min/max/average = 1, 1, 1 AMI: Patch target weights min/max/average = 1, 1, 1 Reading transportProperties Selecting incompressible transport model Newtonian Selecting incompressible transport model Newtonian Selecting turbulence model type LESModel Selecting LES turbulence model Vreman Selecting LES delta type cubeRootVol VremanCoeffs { ce 1.048; ck 0.094; } Calculating field g.h Courant Number mean: 0.00132949 max: 0.2065 PIMPLE: Operating solver in PISO mode Starting time loop Courant Number mean: 0.00132949 max: 0.2065 Interface Courant Number mean: 0 max: 0 deltaT = 0.0111111 Time = 0.0111111 MULES: Solving for alpha1 Phase-1 volume fraction = 0.00147721 Min(alpha1) = 0 Max(alpha1) = 1 MULES: Solving for alpha1 Phase-1 volume fraction = 0.00295443 Min(alpha1) = 0 Max(alpha1) = 1 DICPCG: Solving for alpha1, Initial residual = 0.0995769, Final residual = 4.06332e-15, No Iterations 1 DILUPBiCG: Solving for Ux, Initial residual = 1, Final residual = 3.11085e-08, No Iterations 1 DILUPBiCG: Solving for Uy, Initial residual = 1, Final residual = 4.01e-07, No Iterations 1 DILUPBiCG: Solving for Uz, Initial residual = 1, Final residual = 2.80578e-07, No Iterations 1 GAMG: Solving for p_rgh, Initial residual = 1, Final residual = 3.81469e-07, No Iterations 36 time step continuity errors : sum local = 1.12702e-09, global = -8.37911e-11, cumulative = -8.37911e-11 GAMG: Solving for p_rgh, Initial residual = 0.00724602, Final residual = 7.52881e-07, No Iterations 13 time step continuity errors : sum local = 4.74598e-07, global = 1.64522e-07, cumulative = 1.64439e-07 ExecutionTime = 1.15 s ClockTime = 1 s but if i try to run it on more than one processor (4 in this case) i obtain the following error: Reading g Reading field p_rgh AMI: Creating addressing and weights between 204 source faces and 204 target faces AMI: Patch source weights min/max/average = 1, 1, 1 AMI: Patch target weights min/max/average = 1, 1, 1 Reading field U [3] [3] [3] --> FOAM FATAL IO ERROR: [3] wrong token type - expected int, found on line 46 the word '^A' [3] [3] file: /scratch/villoresi/TEST/processor3/0/U.boundaryField.in.csvFileCoeffs.componentColumns at line 46. [3] [3] From function operator>>(Istream&, int&) [3] in file primitives/ints/int/intIO.C at line 68. Why?? P.S. Yeah, i would like to use swak4foam but i cannot being that i cannot update bison for admin reasons. Last edited by Villo; March 26, 2014 at 05:18. |
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Tags |
csv files, flowrateinletvelocity, parallel error, turbulentinlet |
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