[Nek5000-users] proj_ortho error in pipe flow

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

Hi Steffen,


Thanks for bringing this to our attention.


Adam and I have been looking into this... (no doubt, it's something

stupid done by me awhile back).


Hope to have it resolved by next week.


Best,


Paul


________________________________
From: Nek5000-users <nek5000-users-bounces at lists.mcs.anl.gov> on behalf of nek5000-users at lists.mcs.anl.gov <nek5000-users at lists.mcs.anl.gov>
Sent: Thursday, September 14, 2017 8:18:27 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: Re: [Nek5000-users] proj_ortho error in pipe flow

Hi,

I have made some more tests to find the cause of this issue.
Attached is a laminar pipe flow simulation with temperature and one
passive scalar. The original setup is from Paul's "nusselt.tgz", where
he answered another question of mine.

I found that I can reproduce the same error I see in my turbulent
simulations when there is an additional passive scalar with a different
type of boundary condition, i.e. Neumann boundary condition at the pipe
wall for temperature and Dirichlet boundary condition for the passive
scalar.

Can someone please check my setup and tell me why this causes the
projection to fail?


I hope to save some computational resources by using the projection.
However, if it is not possible, I will keep param(94) = 0.

Kind Regards,
Steffen Straub

--
Karlsruhe Institute of Technology (KIT)
Institute of Fluid Mechanics

M.Sc. Steffen Straub
Doctoral Researcher

Kaiserstraße 10
Building 10.23
76131 Karlsruhe, Germany

Phone: +49 721 608-43027
E-mail: steffen.straub at kit.edu
Web: http://www.istm.kit.edu

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