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Solving chemistry errormsha

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Old   June 24, 2008, 01:23
Default Dear all following error occu
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Mojtaba Shahmohammadian
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Dear all
following error occurs,simulating a dieselFoam case


Solving chemistry
#0 Foam::error::printStack(Foam:stream&) in "/home/msha/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libOpenFOAM.so"
#1 Foam::sigFpe::sigFpeHandler(int) in "/home/msha/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libOpenFOAM.so"
#2 Uninterpreted: [0xffffe420]
#3 Foam::chemistryModel::solve(double, double) in "/home/msha/OpenFOAM/OpenFOAM-1.4.1/lib/linuxGccDPOpt/libchemistryModel.so"
#4 main in "/home/msha/OpenFOAM/msha-1.4.1/applications/bin/linuxGccDPOpt/MydieselFoam"
#5 __libc_start_main in "/lib/tls/i686/cmov/libc.so.6"
#6 Foam::regIOobject::writeObject(Foam::IOstream::str eamFormat, Foam::IOstream::versionNumber, Foam::IOstream::compressionType) const in "/home/msha/OpenFOAM/msha-1.4.1/applications/bin/linuxGccDPOpt/MydieselFoam"
Floating point exception (core dumped)


I've tried euilerImplicit instead of ode but problem not solved

my courant<=.01
any suggestions
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Old   June 24, 2008, 06:41
Default Is that the first iteration?
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Niklas Nordin
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Is that the first iteration?

What is Ydefault?
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Old   June 28, 2008, 08:33
Default Hi Niklas there were some err
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Mojtaba Shahmohammadian
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Hi Niklas
there were some error with meshing.
but I'have some questions:
1-how to ignite mixture in reactingFoam?
2-Can I use dieselFoam with spray off and ignition on to solve non-premixed combustion?
3-how can I make solving chemistry faster?My iteration steps takes 1000 sec (2.8GHz celeron D cpu p4 256 kb cach memory)
5-your email (I mean @scania )does not work could you write a valid email ?

thanks
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Old   June 28, 2008, 08:51
Default forgotten: cells about 12700
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forgotten:
cells about 12700
spiece 39
reaction 188
ch4 and h2 a bluff body burner
courant <=0.5
turbulentreaction on;
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Old   June 30, 2008, 08:20
Default 1 - either by hot inflow gas,
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1 - either by hot inflow gas, hot wall or implement ignition. It all depends on what you are after. I'd probably use a timeVaryingFixedValue bc for the temperature on 1 of the bluff body walls.

2 - I dont think ignition is implemented in dieselFoam either. If you have it in your dictionary its probably because it was at one point. Check XiFoam on how ignition is implemented.

3 - dont know.

4 - what happened to 4?

5 - I ignore all mail regarding foam from people I dont know. If I help it thru this board so all can read, otherwise I'd answer the same question over and over.
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Old   July 1, 2008, 01:21
Default Hi niklas THank you very m
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Mojtaba Shahmohammadian
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Hi niklas

THank you very much
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Old   November 25, 2008, 07:24
Default I have problem with reactingFo
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I have problem with reactingFoam.
How can I ignite the mixture?
any suggestions.

I've added ignite.h from engineFoam and now reactingFoam reads the "combustionProperties" file and during run reports that some cells found igniting,but after some seconds there is no combstion at all.
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