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-   -   Hub Region Not Defined (http://www.cfd-online.com/Forums/cfx/23264-hub-region-not-defined.html)

Flavio November 3, 2006 07:27

Hub Region Not Defined
 
Hi. In CFX-Post, under Turbo Menu, when starting Initialization i get the sequent warning message:

"Hub region is not defined for component 'xxxx' in domain 'xxx'. Cannot initialize turbo-processing module.

What could the reason be?

Thanks.

p.s. Is it better to impose a mass flow rate inlet boundary condition, associated with a average static pressure outlet condition, or the exact opposite?

sam November 3, 2006 07:36

Re: Hub Region Not Defined
 
define ur turbo topology again with care

longbow November 3, 2006 07:59

Re: Hub Region Not Defined
 
CFX-Post has a list of pre-defined names which Post recognizes as Hub. Your Hub region probably is not on that list. Therefore, when Post automatically initializes Turbo mode, it couldn't locate where Hub is. Try initializing Turbo mode mannually especially if you have both rotating and stationary domains. If your Hub region has a fixed name in your cases, you can add it to that pre-defined name list under "Edit/Option/Post/Turbo".

Ermanno November 6, 2006 03:07

Re: Hub Region Not Defined
 
Hi, try initializing mannually ( as Longbow says).

As regards your second question I use (If I can)the following conditions:mass flow inlet/avarage static pressure outlet and it works, generally.

If you know the total inlet condition I think you can impose total condition inlet/mass flow outlet and it should work equally. (Manual says the first solution is more robust than second one)


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