[Nek5000-users] New Recycling BC based on interpolation

[nek5000-users at lists.mcs.anl.gov]

Hi Michael,

Use whatever discrimination you like --- I would not suggest
modifying the character bcs, however, save that you can enter
values in bc(k,f,e,1) for k > 1, for any cbc(f,e,1) = 'v  '

The reason for this is that nek checks explicitly for cbc='v  '
(v, followed by two spaces) in many locations.

The correct place for discriminating parameters is in the
arracy bc().

Normally I discriminate by geometry --- e.g., x < x0, or
something similar, occasionally involving the unit normals on
the face in question - as that can be a stronger discriminator.

Paul


On Fri, 16 Jul 2010, nek5000-users at lists.mcs.anl.gov wrote:

> Hi Aleks,
>
> Thank you very much for looking into this. I already have a question; I noticed that you marked several notes dealing with "RBC single inlet -- modify for other cases". I am assuming this means that you have one inlet that you want to recycle, but another inlet that you do not want to recycle, which just happens to be my case.
>
> Can I distinguish in the rea between the two by "v1 " and "v2 " without giving genmap any problems, and then modify the checks in the usr file accordingly? Also, the subroutine rescale_inflow mentions to modify for multiple inlets as well but I do not see where any modification could/needs to be done for it.
>
> - Michael
>
> ----- Original Message -----
> From: nek5000-users at lists.mcs.anl.gov
> To: nek5000-users at lists.mcs.anl.gov
> Sent: Friday, July 16, 2010 3:03:52 PM GMT -06:00 US/Canada Central
> Subject: [Nek5000-users] New Recycling BC based on interpolation
>
> Hi Michael and Markus,
>
> Here is a test case for an unsteady pipe flow with Michael's GambitPipe.rea file which sets inlet Recycling BCs based on interpolation from a cross-section downstream that you specify by a multiple of the inlet normal:
>
> http://www.mcs.anl.gov/~obabko/z4.tgz
>
>
> Let me know if you have any questions.
> Best,
> Aleks
>
>
>
>
> ----- Original Message -----
> From: nek5000-users at lists.mcs.anl.gov
> To: nek5000-users at lists.mcs.anl.gov
> Sent: Thursday, July 8, 2010 5:06:48 PM GMT -06:00 US/Canada Central
> Subject: Re: [Nek5000-users] New Recycling BC method?
>
>
>
>
>
> No worries, just checkin in to see how it was going, thanks for the update! Look forward to trying it out!
>
>
>
> - Michael
>
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