Discussion Forum

October 2, 2012 2:02am UTC

Adding artificial diffusion/stabilization to PDE

Hi folks,

can anyone point me to an example or model in the library where stabilization is added to a PDE.

I've seen in the forum someone saying "transport problem" example, but it was in V3.5a, and I am using 4.3
and no access to 3.5a.

Any thoughts?

Thanks in advance.

Cheers.

Rui

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October 12, 2012 8:41am UTC in response to Rui Silva

Re: Adding artificial diffusion/stabilization to PDE

Dear Rui,

I understand that you are looking for some stabiilzation method for the PDE form, either coefficient, or general.
Am iI right ?

As far as I know, at least in 4.2, there is no such ready-to-use stabilization feature for these modes. You can get such
features only in "specialized modes", such as heat transfer, fluid flow or mass diffusion.

This is really too bad, because some models are really easy to program in PDE form, but cannot converge without
stabilization.

I wonder why stabilization was not implemented in PDE modes. Is it a technical lock, or a commercial one ?
If you get some information, I'm interested.

Best regards.

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October 13, 2012 11:19am UTC in response to Rui Silva

Re: Adding artificial diffusion/stabilization to PDE

Hi

have you tried to send this demand to "support", they are active partner to talk with, OK they decide the priorities but thhey put all interesting suggestions up on the to do list, and I have noticed, one or two releases later many things are there.

Another way is to come to the annual conferences and discuss it directly with the program managers and the COMSOl developpers

--
Good luck
Ivar

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