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Combustion Modeling in internal combustion engine

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Old   July 26, 2012, 15:36
Question Combustion Modeling in internal combustion engine
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CO
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Hello!
I am trying to run a 3D in-cylinder spark ignited combustion model of of an engine. I can run the model perfectly through a cycle with cold air, but when I introduce combustion with a premixed fuel model the solution diverges just a few time steps after spark ignition. I tried playing around with the underrelaxation factors, but it is still diverging at the same point. are there any tricks to addressing this type of situation that someone has dealt with before?

Thanks!
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Old   May 23, 2013, 07:57
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Hi Joeyt,
Did U Solve your combustion problem successfully. Now I'm facing the problem as you mentioned above.


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Amit
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Old   May 25, 2013, 14:20
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Zacarias Carral
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Try to refine the mesh, reduce the time step and incement the relaxation factors.
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Old   May 26, 2013, 05:30
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Thanks for your suggestion. I'll try it out.


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Amit Kumar
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combustion engine, combustion instability, diverging solution, in-cylinder, spark model

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