[Nek5000-users] neknek new version

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

"I guess what you are trying to do is to have one domain that is periodic
and use that to drive the flow in another domain, which is presumably
inflow-outflow?"

Yes. This is what I mean. And with old nek version (September 2015) my
function works very well, but now (after upgrade) it doesn't interpolate
velocity slice.

In my function I take two slice from each of session, change bc from P->inP
and v->inv, then set intflag = 1 for face with inv and inP and then i
change bc back to P and v as it was before.

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Dear Vatslav,

It's not clear to me how your approach should function if your intent

is to change a Periodic BC to an overlapping-domain-interpolation one.

I guess what you are trying to do is to have one domain that is periodic

and use that to drive the flow in another domain, which is presumably

inflow-outflow? If that is your goal, you might find that recirculating BCs

would be of value (possibly a bit more efficient), depending on your setup.

If we understand the objective we might be able to help.

Best,

Paul

From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov
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Sent: Tuesday, September 26, 2017 3:06:33 AM
To: nek5000-users at lists.mcs.anl.gov
<https://vk.com/write?email=nek5000-users@lists.mcs.anl.gov>
Subject: [Nek5000-users] neknek new version

Hi, Neks.

I use neknek script in my simulation. I write the function like set_intflag
in multimesh.f to find special bc and mark it:

nfaces = 2*ndim
nel = nelfld(ifield)

nflag=nel*nfaces
call izero(intflag,nflag)

do j=1,ifield
do e=1,nel
do f=1,nfaces
if ( session.eq.'pipe_per1' ) then
if ( cbc(f,e,j).eq.'P ' ) intflag(f,e) = 1
endif

if ( session.eq.'pipe_per2' ) then
if ( cbc(f,e,j).eq.'v ' ) intflag(f,e) = 1
endif
enddo
enddo
enddo

( from periodic bc in one nek-session to inlet bc in another nek-session ).

So, it works very well on old version of nek, but on the latest version of
Nek5000 i can't interpolate boundary slice between two session in such way
anymore. And I absolutely no idea why.

Can anyone say how it can be fixed?

Regard, Vatslav



С уважением, Владимир Рыженьков
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