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June 16, 2009, 12:50
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dieselFoam Error
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#1 |
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Member
Rachel Vogl
Join Date: Jun 2009
Posts: 48
Rep Power: 17  |
Hello everyone,
I am trying to solve a problem with following reaction. Due to help from 2 other threads I have reached a point where the solver starts iterations, however it exits in the first time step. Any clues why this could be heppening? Thanks, Rachel Code:
Create time
Create mesh for time = 0
Reading thermophysicalProperties
Selecting thermodynamics package hMixtureThermo<reactingMixture>
Selecting chemistryReader chemkinReader
Reading field U
Reading/calculating face flux field phi
Creating turbulence model.
Selecting RAS turbulence model kEpsilon
kEpsilonCoeffs
{
Cmu 0.09;
C1 1.44;
C2 1.92;
C3 -0.33;
alphah 1;
alphak 1;
alphaEps 0.76923;
muLimiter on;
Lsgs 0.0002;
}
Creating field DpDt
Constructing chemical mechanism
Selecting ODE solver SIBS
chemistryModel::chemistryModel: Number of species = 4 and reactions = 1
Reading environmentalProperties
Reading combustion properties
Constructing Spray
--> FOAM Warning :
From function Cloud<ParticleType>::initCloud(const bool checkClass)
in file /home/rachel/OpenFOAM/OpenFOAM-1.5.x/src/lagrangian/basic/lnInclude/CloudIO.C at line 51
Cannot read particle positions file
"/scratch/rachel/coalgas_syn6a1_3spray/0/lagrangian/defaultCloud"
assuming the initial cloud contains 0 particles.
--> FOAM Warning :
From function entry::getKeyword(word& keyword, Istream& is)
in file db/dictionary/entry/entryIO.C at line 72
Reading /scratch/rachel/coalgas_syn6a1_3spray/constant/sprayProperties
found on line 183 the punctuation token '{'
expected either } or EOF
Selecting injectorType unitInjector
Selecting injectorType unitInjector
Selecting injectorType unitInjector
Selecting atomizationModel off
Selecting dragModel standardDragModel
Selecting evaporationModel standardEvaporationModel
Selecting heatTransferModel RanzMarshall
Selecting wallModel remove
Selecting breakupModel ReitzKHRT
Selecting collisionModel off
Selecting dispersionModel off
Selecting injectorModel hollowConeInjector
Selecting pdfType RosinRammler
Average Velocity for injector 0: 195.235 m/s, injection pressure = 247.667 bar
Average Velocity for injector 1: 195.235 m/s, injection pressure = 247.667 bar
Average Velocity for injector 2: 195.235 m/s, injection pressure = 247.667 bar
Constructing three dimensional spray injection.
Courant Number mean: 0 max: 0.000980191
Starting time loop
Courant Number mean: 0 max: 0.0980191
deltaT = 0.00025
Time = 0.00025
Evolving Spray
Solving chemistry
diagonal: Solving for rho, Initial residual = 0, Final residual = 0, No Iterations 0
DILUPBiCG: Solving for Ux, Initial residual = 1, Final residual = 7.0502e-07, No Iterations 1
DILUPBiCG: Solving for Uy, Initial residual = 1, Final residual = 9.737e-10, No Iterations 2
DILUPBiCG: Solving for Uz, Initial residual = 1, Final residual = 1.01832e-09, No Iterations 2
DILUPBiCG: Solving for CO, Initial residual = 1, Final residual = 6.30454e-07, No Iterations 1
DILUPBiCG: Solving for CO2, Initial residual = 1, Final residual = 6.30453e-07, No Iterations 1
DILUPBiCG: Solving for H2O, Initial residual = 1, Final residual = 6.30453e-07, No Iterations 1
DILUPBiCG: Solving for H2, Initial residual = 1, Final residual = 6.30453e-07, No Iterations 1
#0 Foam::error::printStack(Foam::Ostream&) in "/home/rachel/OpenFOAM/OpenFOAM-1.5.x/lib/linux64GccDPOpt/libOpenFOAM.so"
#1 Foam::sigSegv::sigSegvHandler(int) in "/home/rachel/OpenFOAM/OpenFOAM-1.5.x/lib/linux64GccDPOpt/libOpenFOAM.so"
#2 ?? in "/lib64/libc.so.6"
#3 Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>::operator=(Foam::tmp<Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh> > const&) in "/home/rachel/OpenFOAM/OpenFOAM-1.5.x/applications/bin/linux64GccDPOpt/dieselFoam"
#4 main in "/home/rachel/OpenFOAM/OpenFOAM-1.5.x/applications/bin/linux64GccDPOpt/dieselFoam"
#5 __libc_start_main in "/lib64/libc.so.6"
#6 __gxx_personality_v0 in "/home/rachel/OpenFOAM/OpenFOAM-1.5.x/applications/bin/linux64GccDPOpt/dieselFoam"
Segmentation fault
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June 16, 2009, 15:45
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#2 |
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Senior Member
Mattijs Janssens
Join Date: Mar 2009
Posts: 1,419
Rep Power: 26 |
According to your log you have a syntax error in your sprayProperties. Might be a problem.
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June 17, 2009, 06:37
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#3 | |
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Member
Rachel Vogl
Join Date: Jun 2009
Posts: 48
Rep Power: 17 |
Thanks Mattijs,
I was trying to use 3 sprays in the system. Hence I modified sprayProperties. Now i have switched back to single spray, to test the chemistry. However there is something else thats going wrong and segmentation fault is not that helpful. Here is the new log Quote:
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June 17, 2009, 07:59
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#4 |
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Super Moderator
Niklas Nordin
Join Date: Mar 2009
Location: Stockholm, Sweden
Posts: 693
Rep Power: 29 |
my guess is that your timestep is too large.
200 m/s injection velocity and 0.25 ms integration step. that means your parcels will travel approx 5 cm. The momenum transfer to the gas will be too high. |
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June 24, 2009, 11:22
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#5 |
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Member
Rachel Vogl
Join Date: Jun 2009
Posts: 48
Rep Power: 17 |
Thanks everybody,
It was a problem of setting the right initial/boundary conditions. Since the domain had inlet & outlet, I used BC similar to reactingFoam (from wiki) and then used dieselFoam solver. Now awaiting the results... Thanks, Rachel |
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rintStack(Foam::Ostream&) in "/home/rachel/OpenFOAM/OpenFOAM-1.5.x/lib/linux64GccDPOpt/libOpenFOAM.so"
perator=(Foam::tmp<Foam::Geometri cField<double, Foam::fvPatchField, Foam::volMesh> > const&) in "/home/rachel/OpenFOAM/OpenFOAM-1.5.x/applications/bin/linux64GccDPOpt/dieselFoam"
Linear Mode
