[Nek5000-users] Conjugate heat transfer problem

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

Hi,

Following your instruction, my case is running well and the result looks
reasonable. I am curious about the meaning of p94. p94 in my previous case
(only fluid) set to 3 and it works well. However it cannot work in
conjugate problem with positive number. Is there any problem if I set p94
to zero for my previous case?

Mu Xu


On Mon, Mar 24, 2014 at 11:33 AM, <nek5000-users at lists.mcs.anl.gov> wrote:

>
>  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> 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 [
>> 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: Friday, March 14, 2014 7:22 PM
>> To: 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
>>  _______________________________________________
>> Nek5000-users mailing list
>> Nek5000-users at lists.mcs.anl.gov
>> https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
>>
>
>
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