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Problem in Spray and Combustion simulation

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Old   September 24, 2013, 22:20
Default Problem in Spray and Combustion simulation
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John Wang
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Hi,

I am currently performing some simulations of GDI combustion. But I met problems when apply both spray model (Reitz and MIP2) and ECFM-3Z combustion model. The simulations were stopped because of either negative density or the divergence. Trimming method is adopted to get the mesh.

I would like to know the reason for the failure of the simulations. Could anyone help me about this? Thanks.

Best regards,

John
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Old   October 29, 2013, 06:07
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zheng jianjun
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check the Courant number,if it is too large, plz decrease the timestep and try again.
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Hi,

I am currently performing some simulations of GDI combustion. But I met problems when apply both spray model (Reitz and MIP2) and ECFM-3Z combustion model. The simulations were stopped because of either negative density or the divergence. Trimming method is adopted to get the mesh.

I would like to know the reason for the failure of the simulations. Could anyone help me about this? Thanks.

Best regards,

John
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Old   November 8, 2013, 11:11
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John Wang
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It seems reducing the timstep could not solve this problems.
Thank you all the same.
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Originally Posted by skylent View Post
check the Courant number,if it is too large, plz decrease the timestep and try again.
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