| tfigueiro |
April 1, 2015 10:31 |
simpleFoam - errors in a simplified room ventilation case (my first simulation)
1 Attachment(s)
Hello,
I am an undergraduate ME student (3rd year) learning the basics of OpenFoam, and of CFD in general, in order to simulate air flow and air properties throughout a small ventilated room.
To begin with, I have built an extremely simplified mesh (attachments) with one inlet (mechanical insuflation) and one outlet (to atmosphere, no external work), which will then be replaced by a more realistic model that will be imported from Solidworks.
Attachment 38257
As a first approach, I am trying to run a simpleFoam case to find the velocity and pressure fields. (later on I am going to choose appropriate solvers to account for temperature fields, CO2 distribution and humidity)
While running, and after a few iterations, the terminal displayed many error messages which I lack the knowledge to understand. I was hoping someone here could be so kind as to shed some light on this for me, and try to point me in the right direction.
Code:
tiago@tiago-SATELLITE-L50-B:~/OpenFOAM/tiago-2.3.1/run/proj2015/mesh1-simple$ simpleFoam
/*---------------------------------------------------------------------------*\
| ========= | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox |
| \\ / O peration | Version: 2.3.1 |
| \\ / A nd | Web: www.OpenFOAM.org |
| \\/ M anipulation | |
\*---------------------------------------------------------------------------*/
Build : 2.3.1-bcfaaa7b8660
Exec : simpleFoam
Date : Apr 01 2015
Time : 14:49:38
Host : "tiago-SATELLITE-L50-B"
PID : 15348
Case : /home/tiago/OpenFOAM/tiago-2.3.1/run/proj2015/mesh1-simple
nProcs : 1
sigFpe : Enabling floating point exception trapping (FOAM_SIGFPE).
fileModificationChecking : Monitoring run-time modified files using timeStampMaster
allowSystemOperations : Allowing user-supplied system call operations
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
Create time
Create mesh for time = 0
Reading field p
Reading field U
Reading/calculating face flux field phi
Selecting incompressible transport model Newtonian
Selecting RAS turbulence model kEpsilon
kEpsilonCoeffs
{
Cmu 0.09;
C1 1.44;
C2 1.92;
sigmaEps 1.3;
}
No finite volume options present
SIMPLE: convergence criteria
field p tolerance 0.01
field U tolerance 0.001
field "(k|epsilon|omega)" tolerance 0.001
Starting time loop
streamLine streamLines:
automatic track length specified through number of sub cycles : 5
Time = 1
smoothSolver: Solving for Uy, Initial residual = 1, Final residual = 0.0338637, No Iterations 2
smoothSolver: Solving for Uz, Initial residual = 1, Final residual = 0.0455047, No Iterations 1
GAMG: Solving for p, Initial residual = 1, Final residual = 2.48592e+38, No Iterations 1000
time step continuity errors : sum local = 3.52749e+36, global = -9.0072e+17, cumulative = -9.0072e+17
smoothSolver: Solving for epsilon, Initial residual = 1, Final residual = 8.75374e+17, No Iterations 1000
smoothSolver: Solving for k, Initial residual = 1, Final residual = 6.77587e-19, No Iterations 1
ExecutionTime = 91.22 s ClockTime = 92 s
Time = 2
smoothSolver: Solving for Uy, Initial residual = 0.891086, Final residual = 0.0544469, No Iterations 18
smoothSolver: Solving for Uz, Initial residual = 0.969701, Final residual = 0.0893473, No Iterations 16
GAMG: Solving for p, Initial residual = 0.370998, Final residual = 0.0313951, No Iterations 5
time step continuity errors : sum local = 4.75755e+40, global = 4.18573e+25, cumulative = 4.18573e+25
smoothSolver: Solving for epsilon, Initial residual = 0.5389, Final residual = 2.31757e-18, No Iterations 1
smoothSolver: Solving for k, Initial residual = 3.50512e-17, Final residual = 3.50512e-17, No Iterations 0
ExecutionTime = 93.43 s ClockTime = 94 s
Time = 3
smoothSolver: Solving for Uy, Initial residual = 0.394479, Final residual = 3.00805e+15, No Iterations 1000
smoothSolver: Solving for Uz, Initial residual = 0.482591, Final residual = 7.70933e+15, No Iterations 1000
GAMG: Solving for p, Initial residual = 0.648096, Final residual = 0.119751, No Iterations 1000
time step continuity errors : sum local = 2.78123e+96, global = -1.23512e+80, cumulative = -1.23512e+80
smoothSolver: Solving for epsilon, Initial residual = 1, Final residual = 2.37786e-05, No Iterations 2
smoothSolver: Solving for k, Initial residual = 1.32469e-29, Final residual = 1.32469e-29, No Iterations 0
ExecutionTime = 197.8 s ClockTime = 198 s
Time = 4
smoothSolver: Solving for Uy, Initial residual = 0.999996, Final residual = 2.07884e-17, No Iterations 2
smoothSolver: Solving for Uz, Initial residual = 0.620253, Final residual = 0.0434177, No Iterations 1
GAMG: Solving for p, Initial residual = 1.54528e-19, Final residual = 1.54528e-19, No Iterations 0
time step continuity errors : sum local = 8.90784e+95, global = -9.359e+78, cumulative = -1.32871e+80
smoothSolver: Solving for epsilon, Initial residual = 0.538475, Final residual = 1.24415e-17, No Iterations 1
smoothSolver: Solving for k, Initial residual = 1.07124e-29, Final residual = 1.07124e-29, No Iterations 0
ExecutionTime = 199.05 s ClockTime = 200 s
Time = 5
smoothSolver: Solving for Uy, Initial residual = 0.465389, Final residual = 0.0389067, No Iterations 20
smoothSolver: Solving for Uz, Initial residual = 0.467491, Final residual = 0.0366824, No Iterations 20
#0 Foam::error::printStack(Foam::Ostream&) at ??:?
#1 Foam::sigFpe::sigHandler(int) at ??:?
#2 in "/lib/x86_64-linux-gnu/libc.so.6"
#3 Foam::DICPreconditioner::calcReciprocalD(Foam::Field<double>&, Foam::lduMatrix const&) at ??:?
#4 Foam::DICPreconditioner::DICPreconditioner(Foam::lduMatrix::solver const&, Foam::dictionary const&) at ??:?
#5 Foam::lduMatrix::preconditioner::addsymMatrixConstructorToTable<Foam::DICPreconditioner>::New(Foam::lduMatrix::solver const&, Foam::dictionary const&) at ??:?
#6 Foam::lduMatrix::preconditioner::New(Foam::lduMatrix::solver const&, Foam::dictionary const&) at ??:?
#7 Foam::PCG::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#8 Foam::GAMGSolver::solveCoarsestLevel(Foam::Field<double>&, Foam::Field<double> const&) const at ??:?
#9 Foam::GAMGSolver::Vcycle(Foam::PtrList<Foam::lduMatrix::smoother> const&, Foam::Field<double>&, Foam::Field<double> const&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::Field<double>&, Foam::PtrList<Foam::Field<double> >&, Foam::PtrList<Foam::Field<double> >&, unsigned char) const at ??:?
#10 Foam::GAMGSolver::solve(Foam::Field<double>&, Foam::Field<double> const&, unsigned char) const at ??:?
#11 Foam::fvMatrix<double>::solveSegregated(Foam::dictionary const&) at ??:?
#12 Foam::fvMatrix<double>::solve(Foam::dictionary const&) at ??:?
#13
at ??:?
#14
at ??:?
#15 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6"
#16
at ??:?
[1]+ Exit 1 paraFoam (wd: ~/OpenFOAM/tiago-2.3.1/run/proj2015/mesh1-piso)
(wd now: ~/OpenFOAM/tiago-2.3.1/run/proj2015/mesh1-simple)
Floating point exception (core dumped)
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