[Nek5000-users] Setting up solid elements with genbox

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

Hi Kyle,

Did you take a look at the conj_ht case in the examples folder? It has
something pretty close to what you want.

Justin

On Tue, Jun 19, 2012 at 1:18 PM, <nek5000-users at lists.mcs.anl.gov> wrote:

> Hi all,
>
> I am attempting to setup a simple 2D conjugate heat transfer problem using
> genbox. I use the example "turbChannel" as my model. I want to setup a
> fluid box in between two solid boxes. Therefore, my 2DturbChannel.box file
> appears:
>
> base.rea
> 2                      spatial dimension  ( < 0 --> generate .rea/.re2
> pair)
> 2                      number of fields
> Box
> -8   8                                           nelx,nely for Box
> 0 8 1.                                              x0,x1,gain  (rescaled
> in usrdat)
> -1.0 -0.96 -0.75 -0.45 0.00 0.45 0.75 0.96 1.00     y0,y1,...,yn
> P  ,P  ,W  ,E                                 bc's  (3 chars each!)
> P  ,P  ,W  ,E                                 bc's  (3 chars each!)
> Box
> -8   8                                           nelx,nely for Box
> 0 8 1.                                              x0,x1,gain  (rescaled
> in usrdat)
> 1.00 1.04 1.25 1.55 2.00 2.45 2.75 2.96 3.00     y0,y1,...,yn
> P  ,P  ,E  ,W                                 bc's  (3 chars each!)
> P  ,P  ,E  ,W                                 bc's  (3 chars each!)
> Box
> -8   8                                           nelx,nely for Box
> 0 8 1.                                              x0,x1,gain  (rescaled
> in usrdat)
> -1.00 -1.04 -1.25 -1.55 -2.00 -2.45 -2.75 -2.96 -3.00     y0,y1,...,yn
> P  ,P  ,W  ,E                                 bc's  (3 chars each!)
> P  ,P  ,W  ,E                                 bc's  (3 chars each!)
>
>
> Running genbox on this file produces a .rea file with 192 fluid elements.
> I first try to change "nelv" in the .rea file to 64. Running genmap on this
> file produces a "PERIODIC MISMATCH" error, likely due to the 192 boundary
> conditions for the fluid field. So I then delete all of the boundary
> conditions for elements greater than 64 in the fluid (leaving thermal
> boundary conditions for all 192 elements). Genmap now works, but running
> nek with this .rea/.map combination gives the error:
>
>  ERROR READING INITIAL CONDITION/DRIVE FORCE DATA
>  ABORTING IN ROUTINE RDICDF.
>
>
> I thought that this procedure would work, given previous discussion on the
> problem of conjugate heat transfer in Nek5000 (
> http://lists.mcs.anl.gov/pipermail/nek5000-users/2010-February/000121.html).
> Perhaps I generated the .map file from the incorrect form of the .rea file?
> My question: is there a simple way to deal with solid elements in this
> configuration without using prenek?
>
> Thanks,
>
> Kyle
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