[s.chen8]

Hi all,

I wonder whether it matters to set the sphere radius slightly larger than spark plug gap. Please check out the attached figure.

As you can see from the figure, the radius is slightly larger than the gap, which makes it touching top and bottom electrode.

The main setup is SAGE + RANS for regular PFI SI engine application.

Thank you.

[angela.wu]

Hi Shangua,



Please take a look at the example case in Studio (File --> load example case --> Gasoline spark ignition PFI --> SI8 engine PFI SAGE V8 multi-cylinder transient RANS). This will help you set up the source modeling and provide some guidance on the size of the spherical source.



Thanks,


Angela

[s.chen8]

Thank you Angela.

However, I don't think it is a good example which can answer my question. Please check out the attached figure. The sphere is not even at the center of spark-plug gap.

Originally Posted by angela.wu

Hi Shangua,



Please take a look at the example case in Studio (File --> load example case --> Gasoline spark ignition PFI --> SI8 engine PFI SAGE V8 multi-cylinder transient RANS). This will help you set up the source modeling and provide some guidance on the size of the spherical source.



Thanks,


Angela

[angela.wu]

For best practice, you should keep the spark source in between the electrodes, which means you should reduce the size of your energy source. Having the energy source slightly off center should not affect the results. If you want to, you can shift the location of the spark source.

[s.chen8]

Thank you Angela.

Originally Posted by angela.wu

For best practice, you should keep the spark source in between the electrodes, which means you should reduce the size of your energy source. Having the energy source slightly off center should not affect the results. If you want to, you can shift the location of the spark source.