[Nek5000-users] Conjugate heat transfer problem

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

Mu,

Set p94 and 95 to zero.  That will eliminate that issue.

The result not being right is a separate issue.

Paul

________________________________
From: nek5000-users-bounces at lists.mcs.anl.gov [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: Monday, March 24, 2014 10:20 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: Re: [Nek5000-users] Conjugate heat transfer problem

Hi, Andrea

Thank you for your help. With your instruction, I can build a domain for conjugate heat transfer problem now. However the problem is always crash in the middle of running. I think the problem is during the Helmholtz solver for velocity which is controlled by flag P94 in .rea file. Flag P95 controls the Helmholtz solver for pressure. If I set both P94 and P95 to zero, the case can run but the result is not right. If I set P94 to positive integer and P95 to zero which is I used to, the case is crash. If I set P95 to positive integer and P94 to zero, the case can run and the result looks fine. I have never use this setting before. I want to know is it fine to run the conjugate heat transfer problem with this setting which is P94 to zero and P95 to positive integer.

Mu Xu


On Fri, Mar 14, 2014 at 6:15 PM, <nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov>> wrote:
Hi Xu,

in Conjugate Heat Transfer problems there is no boundary condition for the energy equation at the interface between fluid and solid. The interface behaves like the one of any other internal element, which means that the boundary is just marked with 'E  '.
I worked a lot with Conjugate Heat Transfer. If you need help don't hesitate to contact me.

Cheers,
Andrea.
________________________________
From: nek5000-users-bounces at lists.mcs.anl.gov<mailto:nek5000-users-bounces at lists.mcs.anl.gov> [nek5000-users-bounces at lists.mcs.anl.gov<mailto:nek5000-users-bounces at lists.mcs.anl.gov>] on behalf of nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov> [nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov>]
Sent: Friday, March 14, 2014 7:22 PM
To: nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov>
Subject: [Nek5000-users] Conjugate heat transfer problem

Hi, Neks

I want to set up a 3-D conjugate heat transfer problem. The procedure I used is as below:
1) generate a mesh for fluid domain.
2) generate a mesh for solid domain.
3)merge the element from 1) into 2).

I have one question during the steps 1 and 2. What the boundary condition I need to set in step 1 and 2 at the interface between  fluid and solid?

Mu Xu
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