Maybe the Connectivity filter is what you're looking for. After you do your
extract surface this filter should mark the connected cells.

Regards,
Andy


On Fri, Jan 10, 2014 at 12:11 PM, Aurélien Marsan <aur.mar...@gmail.com>wrote:

> Hi all,
>
> I am working on centrifugal compressors (like turbochargers), using
> unstructured mesh.
>
> Is there a simple way to extract the wall surface ? And also the blade
> surface ?
> I would like to find something like "Extract Surface" -> "Pick surface to
> keep".
>
> I have read that we can do some part of the work by combining "Extract
> Surface" with "Clip". But in case of very three-dimensional geometry, this
> is not possible.
>
> Thank you for any help.
>
> Regards,
>
> A. Marsan
>
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