SimScale CAE Forum

Having Trouble with open inne region

Hello simscale community ,

İm really beginner to CFD and having trouble on simscale , im trying to test my dual fan duct but i cant setup my open inner region as it should be . can you please help be? Which surfaces should i select for 2 way air in?

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Hi again Furkan!
We already discussed about this briefly in our chat, but we can of course expand our discussion here :slight_smile:

There are a few best practices when creating an open inner region. One of them is that all parts should be merged together, especially in this kind of simulation, where the Keep existing parts option is not supposed to be activated during the flow volume operation.

In case you wanted to keep the parts separately, let’s say if this was intended for a conjugate heat transfer analysis for example, the solid parts that extend to the outer part of the domain would still make the extraction to fail. It is important that the program “understands” which is the inner and which is the outer region, so inconsistencies like open gaps/overlapping parts etc should be avoided.

I would advice you to merge everything into a single solid part as a start.

Let me know what you think, and everyone is welcome to add feedback of course!

Best regards,

Thanks :slight_smile: it works and i have tried few simulations , all of them worked well with .iges file format.

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