[Nek5000-users] Conjugate heat transfer with complex properties

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

Yes - that should work.


Set ifuservp = .true. and then, in uservp()


      if (ifield.eq.1) then ! fluid properties

            udiff = param(2)

            utrans = param(1)

      else                            ! thermal properties

            udiff = your diffusivity

            utrans = your rhoCp

      endif



________________________________
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, August 3, 2017 10:13:03 AM
To: nek5000-users at lists.mcs.anl.gov
Subject: Re: [Nek5000-users] Conjugate heat transfer with complex properties


Hi Paul,


Yep, there's some melting going on.  There's a porous structure that does not melt and wax trapped in the porous structure.  The wax melts and re-solidifies.  There really nothing complex happening with the geometry.  A static mesh should do the job.  The material properties are the challenge.  I think I could model the material behavior as having a non-linear specific heat capacity as a function of temperature.


Adam

On 08/03/2017 09:30 AM, nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov> wrote:


Hi Adam,


Can you be more specific?  Is it melting?


In principle, it should be possible as that was one of the original applications for Nek5000.  In practice, however, I would rate that as still a research area (at least from the Nek perspective).  I guess that melting is much easier than freezing, however.


Paul


________________________________
From: Nek5000-users <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: Thursday, August 3, 2017 8:29:09 AM
To: nek5000-users at lists.mcs.anl.gov<mailto:nek5000-users at lists.mcs.anl.gov>
Subject: [Nek5000-users] Conjugate heat transfer with complex properties

Hello,

I have a conjugate heat transfer problem where the solid material is a
composite that undergoes a phase transformation.  Is it possible to
model a material like this in Nek5000?

Thanks,

Adam Lange

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