Re: [petsc-users] different dof in DMDA creating

[Danyang Su via petsc-users]

Hi Barry and Matt,

Would you please give me some advice on the functions I need to use to 
set different dof to the specified nodes. For now, I use 
DMPlexCreateSection that dof is uniform throughout the domain. I am a 
bit lost in choosing the right DMPlex functions, unfortunately.


Thanks and regards,

Danyang

On 2019-02-07 1:53 p.m., Danyang Su wrote:

Thanks, Barry. DMPlex also works for my code.

Danyang

On 2019-02-07 1:14 p.m., Smith, Barry F. wrote:

   No, you would need to use the more flexible DMPlex


On Feb 7, 2019, at 3:04 PM, Danyang Su via petsc-users 
 wrote:


Dear PETSc Users,

Does DMDA support different number of degrees of freedom for 
different node? For example I have a 2D subsurface flow problem with 
the default dof = 1 throughout the domain. Now I want to add some 
sparse fractures in the domain. For the nodes connected to the 
sparse fractures, I want to set dof to 2. Is it possible to set dof 
to 2 for those nodes only?


Thanks,

Danyang

Re: [petsc-users] different dof in DMDA creating

[Smith, Barry F. via petsc-users]

  No, you would need to use the more flexible DMPlex


> On Feb 7, 2019, at 3:04 PM, Danyang Su via petsc-users 
>  wrote:
> 
> Dear PETSc Users,
> 
> Does DMDA support different number of degrees of freedom for different node? 
> For example I have a 2D subsurface flow problem with the default dof = 1 
> throughout the domain. Now I want to add some sparse fractures in the domain. 
> For the nodes connected to the sparse fractures, I want to set dof to 2. Is 
> it possible to set dof to 2 for those nodes only?
> 
> Thanks,
> 
> Danyang
>