Mesh resolution

[Ryan Yan]

Sorry, I forgot to cc to the group.

BTW, if this is designed to have only odd number of points on the finer
level grid, can anyone provide a hint on the reasoning behind this?

Thanks a lot,

Yan

On Tue, Dec 15, 2009 at 10:09 PM, Ryan Yan <vyan2000 at gmail.com> wrote:

> Hi Rebecca,
> Thanks for the info. I noticed that rule; yet, it seems very difficult to
> bring up a finest grid with *even* number of pts.
>
> Yan
>
>
> On Tue, Dec 15, 2009 at 9:55 PM, (Rebecca) Xuefei YUAN <
> xy2102 at columbia.edu> wrote:
>
>> The relation between the coarser grid and finer grid is always half
>> spacing in either x-, y-, or z-direction.
>>
>> Thus, for your finest grid being 257x257x257, you need a coarser grid of
>> 129x129x129 on the coarse grid if your level is 2.
>>
>> Hope this is helpful.
>>
>> R
>>
>>
>>
>> Quoting Ryan Yan <vyan2000 at gmail.com>:
>>
>>  Hi All,
>>> I was ignoring the importance of fixing the mesh size.
>>> For instance, if I want to compare the effect of mesh sequencing on the
>>> solver, I will use one level with 256 pt on each direction in 2d, in the
>>> first run.
>>>
>>> My question is,  in the second run, how to set up the number of points on
>>> the coarsest grid and pre-fix the level of the grid so that DMMG
>>> can bring me the exact resolution of  256 pt on each direction on the
>>> finest
>>> grid. Only this way, the two different solver are solving the problem of
>>> the
>>> same
>>> size.
>>>
>>> Thanks a lot,
>>>
>>> Yan
>>>
>>>
>>
>>
>> --
>> (Rebecca) Xuefei YUAN
>> Department of Applied Physics and Applied Mathematics
>> Columbia University
>> Tel:917-399-8032
>> www.columbia.edu/~xy2102 <http://www.columbia.edu/%7Exy2102>
>>
>>
>
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