I think you may choose the maximum block size as a BAIJ dimension. However ITSOL has variable BLOCK ILU routine which may help you BUT it is not paralleled.<br><br><a href="http://www-users.cs.umn.edu/~saad/software/ITSOL/index.html">http://www-users.cs.umn.edu/~saad/software/ITSOL/index.html</a><br>
<br>B.B.<br><br><div class="gmail_quote">On Mon, Oct 31, 2011 at 7:37 AM, Matthew Knepley <span dir="ltr"><<a href="mailto:knepley@gmail.com" target="_blank">knepley@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
2011/10/31 Gong Ding <span dir="ltr"><<a href="mailto:gdiso@ustc.edu" target="_blank">gdiso@ustc.edu</a>></span><br><div class="gmail_quote"><div><div></div><div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi,<br>
I have several materials, each has different dofs.<br>
It is a block matrix with nonuniform block size.<br>
However, I know it is impossible to set different block size within a BAIJ matrix -- sigh.<br>
I can only use AIJ matrix here.<br>
My question is let a ILU preconditioner of AIJ matrix do block factorization?<br>
<br>
I guess the block ILU can be<br>
1) more efficient since it is cache friendly.<br>
2) more accurate since it has a "matched" structure.<br>
<br>
Or any suggestion?</blockquote><div><br></div></div></div><div>I do not believe any sparse factorization package handles varying block size.</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<font color="#888888"><br>
Gong Ding</font></blockquote></div>-- <br><font color="#888888">What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>
-- Norbert Wiener<br>
</font></blockquote></div><br><br clear="all"><br>-- <br>==================================<br>Behzad Baghapour<br>Ph.D. Candidate, Mechecanical Engineering<br>University of Tehran, Tehran, Iran<br><a href="https://sites.google.com/site/behzadbaghapour" target="_blank">https://sites.google.com/site/behzadbaghapour</a><br>
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