[Nek5000-users] Wall flux contour plots in Visit

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

Hi Hank,

that worked pretty well, thanks.
One strange thing happens, though, which is that when I want to 
visualize contour plots on a cylinder surface, say, (where the surface 
is identified by some value of a scalar variable), the geometry turns 
"inside out", i.e. the outer cylinder wall, where the mesh connects to, 
is colored constant blue, but the inner wall, which faces "nothing", has 
the contour plotted on it. When I switch from natural/nodal to zonal, it 
works but the values are all about half of what they used to be. Which 
value is correct? And how can I get natural/nodal plots on the correct 
side of a face?

Thanks,
Markus


nek5000-users at lists.mcs.anl.gov wrote:
> Hi Markus,
> 
> Sure.  If you make a new field, "identifier", then you would make a 
> Pseudocolor plot of heat flux and apply the Threshold operator to it. 
>  You would then tell the Threshold operator to threshold by "identifier" 
> (not heat flux" and that you only wanted values between 0.99 and 1.01 
> (for the wall faces).
> 
> HTH!
> -Hank
> 
> On Wed, Jul 14, 2010 at 1:20 PM, <nek5000-users at lists.mcs.anl.gov 
> <mailto:nek5000-users at lists.mcs.anl.gov>> wrote:
> 
>     Howdy VisIt-eers among the Neks,
> 
>     I'd like to visualize certain wall values (heat flux, say) in VisIt.
>     Is there a way to extract the boundaries from the complete nek
>     domain in VisIt and then plot certain values only on them?
>     What might help with this is that I can create an identifier
>     variable which would be 1, say, on all wall faces, 2 on all
>     periodic, etc. (see post from Thu Feb 4.)
> 
>     Thanks for any help,
>     Markus
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