[petsc-users] How to refine the Vertex Sets in DMPlex

[Rongliang Chen]

Hi Matt,

Thank you very much.

Best,
Rongliang


On 06/08/2016 01:53 AM, Matthew Knepley wrote:
> On Tue, Jun 7, 2016 at 5:18 PM, Rongliang Chen <rl.chen at siat.ac.cn 
> <mailto:rl.chen at siat.ac.cn>> wrote:
>
>     Hi Matt,
>
>     I know how to label vertex (ex_get_node_set) and face
>     (ex_get_side_set), but do not know how to label the edge for a 3D
>     mesh. Can you give me an example for that?
>
>
> You can label the faces, and then call DMPlexLabelComplete().
>
>   Thanks,
>
>     Matt
>
>     Thanks,
>     Rongliang
>
>     ---------------------
>     Rongliang Chen,   PhD
>     Associate Professor
>
>     Laboratory for Engineering and Scientific Computing
>     Shenzhen Institutes of Advanced Technology
>     Chinese Academy of Sciences
>     Address: 1068 Xueyuan Avenue, Shenzhen University Town, Shenzhen, Guangdong (518055), P. R. China
>     E-mail:rl.chen at siat.ac.cn  <mailto:rl.chen at siat.ac.cn>
>     Phone:+86-755-86392312  <tel:%2B86-755-86392312>
>
>     On 06/07/2016 10:06 PM, Matthew Knepley wrote:
>>     On Tue, Jun 7, 2016 at 3:05 PM, Rongliang Chen
>>     <rl.chen at siat.ac.cn <mailto:rl.chen at siat.ac.cn>> wrote:
>>
>>         Hi Matt,
>>
>>         Thanks for your reply.
>>
>>         Yes, I only labels the vertex because I am doing the finite
>>         element method where I only need the vertex label. Do you
>>         mean that I need to label the faces and get the vertex label
>>         from the  face label?
>>
>>
>>     You need to label vertices and edges.
>>
>>       Thanks,
>>
>>         Matt
>>
>>         Thanks,
>>         Rongliang
>>
>>
>>
>>         On 06/07/2016 09:51 PM, Matthew Knepley wrote:
>>>         On Tue, Jun 7, 2016 at 10:09 AM, Rongliang Chen
>>>         <rl.chen at siat.ac.cn <mailto:rl.chen at siat.ac.cn>> wrote:
>>>
>>>             Dear All,
>>>
>>>             I am using the DMRefine_Plex to refine a mesh. In the
>>>             coarse mesh, it has a label "Vertex Sets" to mark the
>>>             boundary nodes. I found that the DMRefine_Plex did not
>>>             refine this label.
>>>
>>>             For example, in the coarse mesh, there are 100 nodes on
>>>             the boundary, that is the number of nodes in the label
>>>             is 100. In the refined mesh (uniformly refined), the
>>>             number of nodes in the label should be larger than 100,
>>>             but I found that this number is still 100, which means
>>>             the newly added nodes on the boundary were not added to
>>>             the label.
>>>
>>>             But I need a refined label to set the boundary
>>>             conditions. Anyone can tell me how to get a refined
>>>             Vertex Sets label?
>>>
>>>
>>>         All operations are topological in Plex, not geometric. When
>>>         we refine, we split edges (for instance) and the new vertex
>>>         inserted
>>>         inherits the labels from the edge that was split. I am
>>>         guessing that you only labels the vertices.
>>>
>>>           Thanks,
>>>
>>>             Matt
>>>
>>>             Best regards,
>>>             Rongliang
>>>
>>>
>>>
>>>
>>>         -- 
>>>         What most experimenters take for granted before they begin
>>>         their experiments is infinitely more interesting than any
>>>         results to which their experiments lead.
>>>         -- Norbert Wiener
>>
>>
>>
>>
>>     -- 
>>     What most experimenters take for granted before they begin their
>>     experiments is infinitely more interesting than any results to
>>     which their experiments lead.
>>     -- Norbert Wiener
>
>
>
>
> -- 
> What most experimenters take for granted before they begin their 
> experiments is infinitely more interesting than any results to which 
> their experiments lead.
> -- Norbert Wiener

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20160608/3e6ca744/attachment-0001.html>