[jerrry51]

Hi,
I'm trying to determine the flow inside a pipe with an obstacle. I have found a suggestion online, it says I might be dividing by zero. I'm new to Openfoam; So I don't know how that I possible, where to look or what equation the solver is using?

Below is a C&P of Ubuntu.


/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: v2012 |
| \\ / A nd | Website: www.openfoam.com |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : _7bdb509494-20201222 OPENFOAM=2012
Arch : "LSB;label=32;scalar=64"
Exec : pisoFoam
Date : Sep 02 2022
Time : 09:34:17
Host : LAPTOP-HJ3DOVVQ
PID : 1535
I/O : uncollated
Case : /opt/OpenFOAM/jerrry51/run/innerflow
nProcs : 1
trapFpe: Floating point exception trapping enabled (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster (fileModificationSkew 5, maxFileModificationPolls 20)
allowSystemOperations : Allowing user-supplied system call operations



// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time

Create mesh for time = 0


PISO: Operating solver in PISO mode

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 kEpsilon
RAS
{
RASModel kEpsilon;
turbulence on;
printCoeffs on;
Cmu 0.09;
C1 1.44;
C2 1.92;
C3 0;
sigmak 1;
sigmaEps 1.3;
}

No MRF models present

No finite volume options present

Starting time loop

setFlow1:
operating mode: function
reverse flow direction at time: 1

Time = 1e-05

Courant Number mean: 1.25498e-05 max: 0.012728
smoothSolver: Solving for Ux, Initial residual = 1, Final residual = 1.99937e-06, No Iterations 3
smoothSolver: Solving for Uy, Initial residual = 0.985796, Final residual = 2.18313e-06, No Iterations 3
smoothSolver: Solving for Uz, Initial residual = 7.58281e-08, Final residual = 7.58281e-08, No Iterations 0
GAMG: Solving for p, Initial residual = 1, Final residual = 0.0799297, No Iterations 7
GAMG: Solving for p, Initial residual = 0.103716, Final residual = 0.00415696, No Iterations 1
GAMG: Solving for p, Initial residual = 0.0105939, Final residual = 0.000949951, No Iterations 1
time step continuity errors : sum local = 1.39169e-05, global = -2.59931e-07, cumulative = -2.59931e-07
GAMG: Solving for p, Initial residual = 0.00245806, Final residual = 0.000158552, No Iterations 2
GAMG: Solving for p, Initial residual = 0.00162088, Final residual = 9.37383e-05, No Iterations 1
GAMG: Solving for p, Initial residual = 0.000377772, Final residual = 1.84562e-05, No Iterations 3
time step continuity errors : sum local = 2.68275e-07, global = 1.2108e-08, cumulative = -2.47823e-07
GAMG: Solving for p, Initial residual = 0.00048767, Final residual = 3.25829e-05, No Iterations 1
GAMG: Solving for p, Initial residual = 0.000267584, Final residual = 1.79414e-05, No Iterations 1
GAMG: Solving for p, Initial residual = 0.000239528, Final residual = 4.7543e-07, No Iterations 6
time step continuity errors : sum local = 6.89011e-09, global = 8.55373e-10, cumulative = -2.46968e-07
smoothSolver: Solving for epsilon, Initial residual = 0.00151518, Final residual = 1.862e-06, No Iterations 2
smoothSolver: Solving for k, Initial residual = 1, Final residual = 6.02182e-06, No Iterations 11
ExecutionTime = 5.59 s ClockTime = 6 s

Time = 2e-05

Courant Number mean: 0.00537953 max: 0.43072
smoothSolver: Solving for Ux, Initial residual = 0.880292, Final residual = 9.5865e-06, No Iterations 5
smoothSolver: Solving for Uy, Initial residual = 0.327768, Final residual = 8.71105e-06, No Iterations 4
smoothSolver: Solving for Uz, Initial residual = 0.327539, Final residual = 8.36526e-06, No Iterations 4
GAMG: Solving for p, Initial residual = 0.0224484, Final residual = 0.000976712, No Iterations 4
GAMG: Solving for p, Initial residual = 0.698494, Final residual = 0.0281352, No Iterations 1
GAMG: Solving for p, Initial residual = 0.165449, Final residual = 0.00713261, No Iterations 2
time step continuity errors : sum local = 5.09809e-06, global = 7.2063e-09, cumulative = -2.39762e-07
GAMG: Solving for p, Initial residual = 0.0546009, Final residual = 0.00436407, No Iterations 1
GAMG: Solving for p, Initial residual = 0.015117, Final residual = 0.00068793, No Iterations 3
GAMG: Solving for p, Initial residual = 0.0140246, Final residual = 0.000739186, No Iterations 1
time step continuity errors : sum local = 5.87385e-07, global = -6.20536e-08, cumulative = -3.01815e-07
GAMG: Solving for p, Initial residual = 0.00541376, Final residual = 0.000470611, No Iterations 1
GAMG: Solving for p, Initial residual = 0.00418146, Final residual = 0.000327511, No Iterations 1
GAMG: Solving for p, Initial residual = 0.00327291, Final residual = 7.06499e-07, No Iterations 10
time step continuity errors : sum local = 5.60645e-10, global = -1.16766e-10, cumulative = -3.01932e-07
smoothSolver: Solving for epsilon, Initial residual = 0.00126451, Final residual = 9.25925e-06, No Iterations 18
smoothSolver: Solving for k, Initial residual = 0.15769, Final residual = 9.92123e-06, No Iterations 68
ExecutionTime = 10.42 s ClockTime = 11 s

Time = 3e-05

Courant Number mean: 0.00542667 max: 1.36537
smoothSolver: Solving for Ux, Initial residual = 0.0647018, Final residual = 9.90506e-06, No Iterations 13
smoothSolver: Solving for Uy, Initial residual = 0.0519973, Final residual = 9.91234e-06, No Iterations 58
smoothSolver: Solving for Uz, Initial residual = 0.0538276, Final residual = 9.98536e-06, No Iterations 71
GAMG: Solving for p, Initial residual = 0.294447, Final residual = 0.0193162, No Iterations 1
GAMG: Solving for p, Initial residual = 0.0647306, Final residual = 0.00293876, No Iterations 2
GAMG: Solving for p, Initial residual = 0.0272195, Final residual = 0.00184016, No Iterations 1
time step continuity errors : sum local = 7.12536e-07, global = -2.78807e-08, cumulative = -3.29813e-07
GAMG: Solving for p, Initial residual = 0.0115409, Final residual = 0.000747631, No Iterations 2
GAMG: Solving for p, Initial residual = 0.0114233, Final residual = 0.00084361, No Iterations 1
GAMG: Solving for p, Initial residual = 0.00778734, Final residual = 0.000589948, No Iterations 1
time step continuity errors : sum local = 2.24989e-07, global = -2.87132e-08, cumulative = -3.58526e-07
GAMG: Solving for p, Initial residual = 0.00663028, Final residual = 0.00063885, No Iterations 1
GAMG: Solving for p, Initial residual = 0.00703486, Final residual = 0.000573938, No Iterations 1
GAMG: Solving for p, Initial residual = 0.00813398, Final residual = 6.0697e-07, No Iterations 12
time step continuity errors : sum local = 2.25389e-10, global = 1.34606e-11, cumulative = -3.58512e-07
smoothSolver: Solving for epsilon, Initial residual = 0.0527888, Final residual = 9.88773e-06, No Iterations 245
smoothSolver: Solving for k, Initial residual = 0.534637, Final residual = 9.68937e-06, No Iterations 347
ExecutionTime = 21.16 s ClockTime = 22 s

Time = 4e-05

Courant Number mean: 0.00543158 max: 9.13783
smoothSolver: Solving for Ux, Initial residual = 0.127508, Final residual = 2.27095e-05, No Iterations 1000
smoothSolver: Solving for Uy, Initial residual = 0.347521, Final residual = 0.000280552, No Iterations 1000
smoothSolver: Solving for Uz, Initial residual = 0.382013, Final residual = 0.000316912, No Iterations 1000
GAMG: Solving for p, Initial residual = 0.168938, Final residual = 0.00815396, No Iterations 2
GAMG: Solving for p, Initial residual = 0.018499, Final residual = 0.00106506, No Iterations 2
GAMG: Solving for p, Initial residual = 0.0301423, Final residual = 0.00185446, No Iterations 2
time step continuity errors : sum local = 7.58789e-07, global = -5.00063e-08, cumulative = -4.08519e-07
GAMG: Solving for p, Initial residual = 0.00998665, Final residual = 0.00045551, No Iterations 2
GAMG: Solving for p, Initial residual = 0.0418389, Final residual = 0.00344686, No Iterations 1
GAMG: Solving for p, Initial residual = 0.037134, Final residual = 0.00302931, No Iterations 1
time step continuity errors : sum local = 1.01325e-06, global = -4.50373e-08, cumulative = -4.53556e-07
GAMG: Solving for p, Initial residual = 0.0107094, Final residual = 0.000971928, No Iterations 1
GAMG: Solving for p, Initial residual = 0.0168994, Final residual = 0.00142457, No Iterations 1
GAMG: Solving for p, Initial residual = 0.0092674, Final residual = 4.86393e-07, No Iterations 12
time step continuity errors : sum local = 7.30285e-10, global = 2.50114e-11, cumulative = -4.53531e-07
smoothSolver: Solving for epsilon, Initial residual = 0.673047, Final residual = 0.00357296, No Iterations 1000
bounding epsilon, min: -357.644 max: 69134.4 average: 94.068
smoothSolver: Solving for k, Initial residual = 0.697222, Final residual = 0.00355527, No Iterations 1000
bounding k, min: -10.982 max: 6603.38 average: 9.47623
ExecutionTime = 73.24 s ClockTime = 74 s

Time = 5e-05

Courant Number mean: 0.00548243 max: 18.2303
smoothSolver: Solving for Ux, Initial residual = 0.596932, Final residual = 5.22279e-05, No Iterations 1000
smoothSolver: Solving for Uy, Initial residual = 0.804674, Final residual = 0.00016447, No Iterations 1000
smoothSolver: Solving for Uz, Initial residual = 0.917597, Final residual = 0.00101165, No Iterations 1000
GAMG: Solving for p, Initial residual = 0.0795653, Final residual = 0.00769873, No Iterations 2
GAMG: Solving for p, Initial residual = 0.0160447, Final residual = 0.000817101, No Iterations 2
GAMG: Solving for p, Initial residual = 0.00680578, Final residual = 0.000642501, No Iterations 1
time step continuity errors : sum local = 3.42634e-06, global = -2.83045e-08, cumulative = -4.81835e-07
GAMG: Solving for p, Initial residual = 0.00690272, Final residual = 0.000430963, No Iterations 2
GAMG: Solving for p, Initial residual = 0.00895378, Final residual = 0.00078614, No Iterations 1
GAMG: Solving for p, Initial residual = 0.0100332, Final residual = 0.000827753, No Iterations 1
time step continuity errors : sum local = 2.1384e-06, global = -2.37474e-08, cumulative = -5.05583e-07
GAMG: Solving for p, Initial residual = 0.0054297, Final residual = 0.000503077, No Iterations 1
GAMG: Solving for p, Initial residual = 0.0164809, Final residual = 0.00122472, No Iterations 1
GAMG: Solving for p, Initial residual = 0.00452292, Final residual = 7.47723e-07, No Iterations 12
time step continuity errors : sum local = 3.32472e-09, global = 2.51419e-11, cumulative = -5.05558e-07
smoothSolver: Solving for epsilon, Initial residual = 0.0101565, Final residual = 9.93169e-06, No Iterations 106
bounding epsilon, min: -30407.5 max: 1.87047e+08 average: 61692.6
smoothSolver: Solving for k, Initial residual = 0.865984, Final residual = 0.00037257, No Iterations 1000
bounding k, min: -1662.28 max: 6576.47 average: 9.41606
ExecutionTime = 115.83 s ClockTime = 116 s

Time = 6e-05

Courant Number mean: 0.00560393 max: 41.1757
smoothSolver: Solving for Ux, Initial residual = 0.831168, Final residual = 0.00595873, No Iterations 1000
smoothSolver: Solving for Uy, Initial residual = 0.676357, Final residual = 0.0221896, No Iterations 1000
smoothSolver: Solving for Uz, Initial residual = 0.920653, Final residual = 0.00918834, No Iterations 1000
GAMG: Solving for p, Initial residual = 0.793943, Final residual = 0.0274106, No Iterations 2
GAMG: Solving for p, Initial residual = 0.43021, Final residual = 0.0228483, No Iterations 1
GAMG: Solving for p, Initial residual = 0.278012, Final residual = 0.0172121, No Iterations 1
time step continuity errors : sum local = 0.00121619, global = -1.64591e-06, cumulative = -2.15146e-06
GAMG: Solving for p, Initial residual = 0.345029, Final residual = 0.0125169, No Iterations 2
GAMG: Solving for p, Initial residual = 0.454259, Final residual = 0.0245158, No Iterations 1
GAMG: Solving for p, Initial residual = 0.321939, Final residual = 0.0155154, No Iterations 1
time step continuity errors : sum local = 0.000830469, global = 2.07763e-06, cumulative = -7.38302e-08
GAMG: Solving for p, Initial residual = 0.305439, Final residual = 0.022003, No Iterations 1
GAMG: Solving for p, Initial residual = 0.30005, Final residual = 0.0149893, No Iterations 1
GAMG: Solving for p, Initial residual = 0.254351, Final residual = 5.76883e-07, No Iterations 14
time step continuity errors : sum local = 2.43323e-08, global = -4.31844e-10, cumulative = -7.42621e-08
smoothSolver: Solving for epsilon, Initial residual = 1, Final residual = 4.47465e-11, No Iterations 1
bounding epsilon, min: -2.97699e+12 max: 1.31109e+12 average: -1.82458e+07
smoothSolver: Solving for k, Initial residual = 1.88239e-09, Final residual = 1.88239e-09, No Iterations 0
ExecutionTime = 148.03 s ClockTime = 149 s

Time = 7e-05

Courant Number mean: 0.0193547 max: 6753.66
smoothSolver: Solving for Ux, Initial residual = 0.327596, Final residual = 1.18832e-13, No Iterations 1
smoothSolver: Solving for Uy, Initial residual = 0.949213, Final residual = 2.6096e-14, No Iterations 1
smoothSolver: Solving for Uz, Initial residual = 0.903272, Final residual = 2.72701e-14, No Iterations 1
GAMG: Solving for p, Initial residual = 0.883784, Final residual = 0.0234723, No Iterations 2
GAMG: Solving for p, Initial residual = 4.13852e-14, Final residual = 4.13852e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 4.13852e-14, Final residual = 4.13852e-14, No Iterations 0
time step continuity errors : sum local = 2561.78, global = 3.82734e-07, cumulative = 3.08472e-07
GAMG: Solving for p, Initial residual = 4.13861e-14, Final residual = 4.13861e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 4.13861e-14, Final residual = 4.13861e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 4.13861e-14, Final residual = 4.13861e-14, No Iterations 0
time step continuity errors : sum local = 2561.83, global = 3.98694e-07, cumulative = 7.07166e-07
GAMG: Solving for p, Initial residual = 4.13863e-14, Final residual = 4.13863e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 4.13863e-14, Final residual = 4.13863e-14, No Iterations 0
GAMG: Solving for p, Initial residual = 4.13863e-14, Final residual = 4.13863e-14, No Iterations 0
time step continuity errors : sum local = 2561.85, global = 3.99747e-07, cumulative = 1.10691e-06
smoothSolver: Solving for epsilon, Initial residual = 0.667741, Final residual = 1.41096e-17, No Iterations 1
bounding epsilon, min: -1.8332e+13 max: 2.43997e+13 average: -1.90307e+08
#0 Foam::error:rintStack(Foam::Ostream&)sh: 1: addr2line: not found
addr2line failed
#1 Foam::sigFpe::sigHandler(int)sh: 1: addr2line: not found
addr2line failed
#2 ?sh: 1: addr2line: not found
addr2line failed
#3 Foam::GaussSeidelSmoother::smooth(Foam::word const&, Foam::Field<double>&, Foam::lduMatrix const&, Foam::Field<double> const&, Foam::FieldField<Foam::Field, double> const&, Foam::UPtrList<Foam::lduInterfaceField const> const&, unsigned char, int)sh: 1: addr2line: not found
addr2line failed
#4 Foam::GaussSeidelSmoother::smooth(Foam::Field<doub le>&, Foam::Field<double> const&, unsigned char, int) constsh: 1: addr2line: not found
addr2line failed
#5 Foam::smoothSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) constsh: 1: addr2line: not found
addr2line failed
#6 Foam::fvMatrix<double>::solveSegregated(Foam::dict ionary const&)sh: 1: addr2line: not found
addr2line failed
#7 Foam::fvMatrix<double>::solveSegregatedOrCoupled(F oam::dictionary const&)sh: 1: addr2line: not found
addr2line failed
#8 Foam::fvMesh::solve(Foam::fvMatrix<double>&, Foam::dictionary const&) constsh: 1: addr2line: not found
addr2line failed
#9 Foam::SolverPerformance<double> Foam::solve<double>(Foam::tmp<Foam::fvMatrix<doubl e> > const&)sh: 1: addr2line: not found
addr2line failed
#10 Foam::RASModels::kEpsilon<Foam::IncompressibleTurb ulenceModel<Foam::transportModel> >::correct()sh: 1: addr2line: not found
addr2line failed
#11 ?sh: 1: addr2line: not found
addr2line failed
#12 __libc_start_mainsh: 1: addr2line: not found
addr2line failed
#13 ?sh: 1: addr2line: not found
addr2line failed
Floating point exception