Did you use the option “colorize=on”?

L.

> On 18 Nov 2018, at 10:45, Praveen C <cprav...@gmail.com> wrote:
> 
> 
> 
>> On 18-Nov-2018, at 2:59 PM, luca.heltai <luca.hel...@gmail.com> wrote:
>> 
>> Dear Praveen, 
>> 
>> this is actually a feature, and not a bug. The reason is that, by default, 
>> deal.II generates triangulations with boundary id = 0. If you don’t specify 
>> a boundary id in the gmsh file, then all boundary faces get boundary id = 0.
>> 
>> This allows us to save space in the output grid, since there is no need to 
>> save faces with id = 0, because they will be recreated correctly when you 
>> read the mesh back in.
>> 
>> Best,
>> Luca.
>  
> 
> ok. This is fine for deal.II but if I try to use this mesh with other tools, 
> then it may not be ideal. Maybe an option to save id=0 faces also might be 
> useful.
> 
> The other issue is that both inner sphere and part of the outer sphere are 
> getting id=0. This makes it difficult to use the boundary id to set different 
> boundary conditions on the inner and outer sphere.
> 
> The description says faces on outer sphere should get id=1 but that is not 
> happening.
> 
> Best
> praveen
> 
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