What if I give a too good initialization in Fluent?

ivanbuz · October 23, 2009, 02:33

Guys, it seems I am having trouble to make it converge.

simulation of unsteady flow, LES

summary: I have some doubt with the old mesh, So I generate another mesh which might be exactly the same as the old one. Then I use the interpolation file from the old case to initialize the new case, start simulation, and now I am having trouble to make it converge fast in every time step.

How can I set the convergence criteria properly when the initialization is too good?

Thanks a lot!

teguhtf · October 23, 2009, 18:32

Hi ivanbuz,
I dont think that Initiation has much response on your simulation!!! I think initiation is how we can guess the final value!!! The value is depend on us!!!
there is no wrong and right value!!
hope it helps
teguhtf

October 23, 2009, 02:33	What if I give a too good initialization in Fluent?	#1
ivanbuz Member Ivan Join Date: May 2009 Posts: 85 Rep Power: 16	Guys, it seems I am having trouble to make it converge. simulation of unsteady flow, LES summary: I have some doubt with the old mesh, So I generate another mesh which might be exactly the same as the old one. Then I use the interpolation file from the old case to initialize the new case, start simulation, and now I am having trouble to make it converge fast in every time step. How can I set the convergence criteria properly when the initialization is too good? Thanks a lot!

October 23, 2009, 18:32	guess the value!!!	#2
teguhtf Senior Member teguh hady Join Date: Aug 2009 Location: Saga, Japan Posts: 222 Rep Power: 17	Hi ivanbuz, I dont think that Initiation has much response on your simulation!!! I think initiation is how we can guess the final value!!! The value is depend on us!!! there is no wrong and right value!! hope it helps teguhtf

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