Sorry, I forgot to cc to the group.<br><br>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?<br><br>Thanks a lot,<br><br>Yan<br><br>
<div class="gmail_quote">On Tue, Dec 15, 2009 at 10:09 PM, Ryan Yan <span dir="ltr"><<a href="mailto:vyan2000@gmail.com">vyan2000@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi Rebecca,<br>Thanks for the info. I noticed that rule; yet, it seems very difficult to bring up a finest grid with *even* number of pts.<br><font color="#888888"><br>Yan</font><div><div></div><div class="h5"><br><br><div class="gmail_quote">
On Tue, Dec 15, 2009 at 9:55 PM, (Rebecca) Xuefei YUAN <span dir="ltr"><<a href="mailto:xy2102@columbia.edu" target="_blank">xy2102@columbia.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">The relation between the coarser grid and finer grid is always half spacing in either x-, y-, or z-direction.<br>
<br>
Thus, for your finest grid being 257x257x257, you need a coarser grid of 129x129x129 on the coarse grid if your level is 2.<br>
<br>
Hope this is helpful.<br>
<br>
R<div><div></div><div><br>
<br>
<br>
Quoting Ryan Yan <<a href="mailto:vyan2000@gmail.com" target="_blank">vyan2000@gmail.com</a>>:<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Hi All,<br>
I was ignoring the importance of fixing the mesh size.<br>
For instance, if I want to compare the effect of mesh sequencing on the<br>
solver, I will use one level with 256 pt on each direction in 2d, in the<br>
first run.<br>
<br>
My question is, in the second run, how to set up the number of points on<br>
the coarsest grid and pre-fix the level of the grid so that DMMG<br>
can bring me the exact resolution of 256 pt on each direction on the finest<br>
grid. Only this way, the two different solver are solving the problem of the<br>
same<br>
size.<br>
<br>
Thanks a lot,<br>
<br>
Yan<br>
<br>
</blockquote>
<br>
<br>
<br></div></div><font color="#888888">
-- <br>
(Rebecca) Xuefei YUAN<br>
Department of Applied Physics and Applied Mathematics<br>
Columbia University<br>
Tel:917-399-8032<br>
<a href="http://www.columbia.edu/%7Exy2102" target="_blank">www.columbia.edu/~xy2102</a><br>
<br>
</font></blockquote></div><br>
</div></div></blockquote></div><br>