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<div class="moz-cite-prefix">Hi<br>
<br>
We had similar problem. Check tolerance fro pressure and velocity
solver (parameters 21, 22 in .rea). They can limit your
convergence.<br>
Regards<br>
Adam<br>
<br>
On 06/08/14 06:56, <a class="moz-txt-link-abbreviated" href="mailto:nek5000-users@lists.mcs.anl.gov">nek5000-users@lists.mcs.anl.gov</a> wrote:<br>
</div>
<blockquote
cite="mid:mailman.2896.1407301032.3424.nek5000-users@lists.mcs.anl.gov"
type="cite">
<div dir="ltr">Hello
<div><br>
</div>
<div>I implemented an SFD for a 2d cylinder</div>
<div><br>
</div>
<div><a moz-do-not-send="true"
href="https://bitbucket.org/cpraveen/nek5000/src/master/ext_cyl/">https://bitbucket.org/cpraveen/nek5000/src/master/ext_cyl/</a><br>
</div>
<div><br>
</div>
<div>It seems to work but the residuals reduce by about 5 orders
of magnitude only. Maybe I am not choosing the parameters
correctly. I would like to see how others do it and compare
with my own implementation.</div>
<div><br>
</div>
<div>Best</div>
<div>praveen</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Mon, Jun 30, 2014 at 1:21 PM, <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:nek5000-users@lists.mcs.anl.gov"
target="_blank">nek5000-users@lists.mcs.anl.gov</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi SL<br>
<br>
We have implemented SFD some time ago and we can share the
code if you wish. It is probably good to have single tested
version of the code than develop number of variations. We've
already shared the code with Elia.<br>
Regards<br>
Adam
<div class="HOEnZb">
<div class="h5"><br>
<br>
<br>
On 27/06/14 17:28, <a moz-do-not-send="true"
href="mailto:nek5000-users@lists.mcs.anl.gov"
target="_blank">nek5000-users@lists.mcs.anl.gov</a>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
Dear Nek's,<br>
<br>
I'm trying to program a Selective Frequency Damping
following the article of Akervik et. al (Physics of
Fluids, 2006) and some Nek5000 posts.<br>
<br>
I'm able to compile the code, however, when I try to
run my simulation, I find the following error message:<br>
<br>
0 0.0000E+00 Write checkpoint:<br>
<br>
0 0.0000E+00 OPEN:<br>
At line 335 of file User/nek5_svn/trunk/nek/prepost.f
(unit = 24, file = '')<br>
Fortran runtime error: File '' does not exist<br>
<br>
It seems to be something related to param 66. I've
tried with p66=6, 0, 1, -1, but I always get the same
error.<br>
<br>
Do you know what happens?<br>
<br>
Thanks<br>
SL<br>
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