[petsc-users] Is the staggered grid good for SNES? or only for SIMPLE scheme?

Ryan Yan vyan2000 at gmail.com
Tue Jan 26 19:11:50 CST 2010

Hi Barry,
On Tue, Jan 26, 2010 at 6:08 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:

>  Typing "why use staggered grids?" into google gave me the first answer:
> http://www.cfd-online.com/Wiki/Staggered_grid
I did see that webpage and it is where I started.

>  Though a bit terse and far from complete it is more or less correct. As it
> states, coding a non-staggered grid is generally easier,
> Agreed.

>  You can use or not use staggered grids for such problems but you should
> understand something about the issues before you do anything. This isn't
> really a question about PDEs but a question about PDE discretizations for
> which there is a huge literature. You should talk to a fluid dynamics person
> about your particular problem.

Agreed. Thank you very much for the suggestion. Sorry for this off-topic


>   Barry
> On Jan 26, 2010, at 4:57 PM, Ryan Yan wrote:
>  Hi All,
>> I am re-thinking my discretization of a problem: is the stagger grid only
>> good for SIMPLE scheme?
>> I am wondering if I am using a stagger grid with FVM to discretize the
>> conservation system(velocity, pressure, internal energy), is there any
>> drawback of using newton's method to solve it, comparing with the SIMPLE
>> scheme for which the staggered grid is suit for? I am not sure whether the
>> question is asked properly, please feel free to ask more information if
>> needed. Any comment is welcome.
>> Thanks a lot,
>> Yan
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