[firedrake] Mapping nodal values from parent to extruded mesh

[Tuomas Karna]

Hi all,

A couple of questions regarding those extruded mesh -> parent mesh copy 
operations,

A while back I got the reverse 2d->3d copy working with a hard-coded 
pyop2 kernel (like in mesh extrusion). I'm not familiar with COFFEE 
syntax, is there documentation/examples somewhere?

The 3d->2d copy routine in extrusion_extraction branch checks that the 
function space is CG. Does this method easily generalize to other 
spaces? DGxCG prisms seem to work OK. I'm also interested in using DGxDG 
and RTxCG/DG spaces.


Cheers,

Tuomas


On 03/05/2015 10:24 AM, Tuomas Karna wrote:
> Thanks David,
>
> This is great, I'll try doing the reverse operation.
>
> - Tuomas
>
> On 03/05/2015 08:20 AM, David Ham wrote:
>> Hi Tuomas,
>>
>> This wasn't there this morning but I've implemented one of the cases 
>> (pulling out the top and bottom maps). The result is in the 
>> extrusion_extraction branches of both PyOP2 and Firedrake. The 2d->3d 
>> operation would be rather similar except that you'd have to 
>> interrogate the fiat_element on the extruded Function in order to 
>> determine which extruded nodes are "on top of" the 2d nodes you have. 
>> Unfortunately I won't have time to do that one soon (huge amounts to 
>> do before SIAM CSE next week) but feel free to have a try and 
>> complain when it doesn't work!
>>
>> Cheers,
>>
>> David
>>
>> On 4 March 2015 at 22:23, Tuomas Karna <tuomas.karna at gmail.com 
>> <mailto:tuomas.karna at gmail.com>> wrote:
>>
>>     Hi all,
>>
>>     I'd need to copy nodal values between fields on parent and extruded
>>     meshes. For example, copy 2d->3d (constant over vertical) or 3d->2d
>>     (extract surface/bottom level). The horizontal function space is the
>>     same. Is there an easy way to do this? Is there a map of extruded
>>     nodes
>>     somewhere?
>>
>>     Thanks,
>>
>>     Tuomas
>>
>>
>>
>>     _______________________________________________
>>     firedrake mailing list
>>     firedrake at imperial.ac.uk <mailto:firedrake at imperial.ac.uk>
>>     https://mailman.ic.ac.uk/mailman/listinfo/firedrake
>>
>>
>>
>>
>> -- 
>> Dr David Ham
>> Departments of Mathematics and Computing
>> Imperial College London
>>
>> http://www.imperial.ac.uk/people/david.ham
>>
>>
>> _______________________________________________
>> firedrake mailing list
>> firedrake at imperial.ac.uk
>> https://mailman.ic.ac.uk/mailman/listinfo/firedrake
>

-------------- next part --------------
HTML attachment scrubbed and removed