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Initial values of Species

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Old   February 28, 2017, 02:18
Default Initial values of Species
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Mahdi Seddiq
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Hello
Does anybody know how to set the values of initial species when using EGR ?
I am using n-Butanol/PAH-Mechanism with 45% EGR and I set the values for it but the peak of pressure of combustion considerably increased about 4 MPa upper than experimental data!
I think the problem is the value of the n-butanol mass fraction and I dont konw how to set the values!

Thanks
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Old   April 23, 2017, 07:39
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jay chhatbar
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It depends on how you are inject your fuel and what simulation are you doing.
If you are doing port fuel injection and simulation of only combustion chamber then you have to give mass fraction with respect to inlet air with egr. It is easier to give equlance ratio in this condition.
But if you are doing direct injection then you have to give only the egr at initial conditions.

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