If you have a side set on the side you are interested in then in
Paraview you can show only that side and plot the solution on it.

When you open the result just deselect all "blocks" and the select the
side set corresponding to the boundary you want to view and then hit
Apply.  You can then color it by solution variables like normal...

Derek

Sent from my iPhone

On Aug 4, 2012, at 10:34 AM, David Knezevic <[email protected]> wrote:

>
>> On Sat, 4 Aug 2012, David Knezevic wrote:
>>
>>> I was wondering if anyone can suggest a good way to plot the solution on
>>> the boundary of a mesh only? I guess I could use BoundaryInfo::sync to
>>> make the boundary mesh, then use a MeshFunction to project the boundary
>>> solution, and then plot. But I was wondering if there's a simpler way?
>>
>> That's pretty much what I do, except sometimes add additional variables to a 
>> boundary system for post processing. This is nice because you can extract 
>> just a subset corresponding to specified bcs.
>>
>> That's the most flexible approach. For special classes of properties 
>> sometimes you can exploit features, do example extracting a 0 velocity 
>> isosurface to get at no slip walls, but of course that's a special case...
>>
>> -Ben
>> I'm afraid there isn't.  If what you describe was exactly what
>> everyone wanted to do, I'd have already encapsulated it in some sort
>> of SystemTools::plot_boundary() routine.  Unfortunately, people who
>> are interested in boundary plots are likely interested in boundary
>> flux plots too, right now nothing but FEMSystem has any way of getting
>> at flux information (with constitutive laws included, as opposed to
>> mere gradient information), and even that is pretty limited (e.g. we
>> can't distinguish between convective fluxes, diffusive fluxes, and
>> boundary source terms at the library level).
>> ---
>> Roy
>
>
> OK sounds good, thanks for the replies
>
> David
>
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