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Forum: CFX

July 18, 2016, 07:56

Replies: 19

Sh0uld I use r0tati0n 0r n0?

Views: 1,402

Posted By ghorrocks

The nonoverlap fraction is reported by the...

The nonoverlap fraction is reported by the solver. As the port slides open and shut this will vary. When the port is shut it will go to 0%. So keep an eye on this and check that the value it reports...

Forum: CFX

July 18, 2016, 06:45

Replies: 19

Sh0uld I use r0tati0n 0r n0?

Views: 1,402

Posted By ghorrocks

1) Pitch change = None. 2) GGI interface...

1) Pitch change = None.
2) GGI interface fraction - I am not familiar with this option.
2a) Stationary condition means it does not move. It means the GGI is only calculated once and never again....

Forum: CFX

July 18, 2016, 06:13

Replies: 19

Sh0uld I use r0tati0n 0r n0?

Views: 1,402

Posted By ghorrocks

Also: the model works best when it starts from...

Also: the model works best when it starts from top dead centre. It is easier to stretch a mesh than squash it.

Also 2: As long as your piston mesh is good quality you won't need remeshing. It can...

Forum: CFX

July 18, 2016, 06:11

Replies: 19

Sh0uld I use r0tati0n 0r n0?

Views: 1,402

Posted By ghorrocks

I have simulated many 2 stroke port valve engines...

I have simulated many 2 stroke port valve engines in my time. The basic approach is quite simple:

1) The ports are one domain with a stationary mesh.
2) The piston is a domain with a moving mesh....

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