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<tt>Try 150 for 16^3 blocks. (The exact number depends on the number
of variables in your problem and memory per core available on your
machine).<br>
<br>
Tomek<br>
--<br>
</tt>
<div class="moz-cite-prefix">On 09/16/14 12:24, Mario Manuel wrote:<br>
</div>
<blockquote
cite="mid:A2D04CE2-323C-4149-AA35-ED685B7BB92C@umich.edu"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
Hi Roman,
<div><br>
</div>
<div>Thanks for the quick response. Using the lrefine_min_init=2
(I also did =3) worked fine and with lrefine_max set 8 gives me
a few resolution elements for the amplitude of the perturbation.
I have also updated the domain and nblockx/nblocky to reflect a
square cell.</div>
<div><br>
</div>
<div>… now if I only had some more processors to run the
simulation on. :)</div>
<div><br>
</div>
<div>Any thoughts on setting -maxblocks in the setup file? I
originally had the default (1000 I think), and I’ve now upped it
to 5000. My computer hasn’t exploded yet, but I’m not really
familiar with what determines an optimum number for maxblocks.</div>
<div><br>
</div>
<div>Cheers,</div>
<div>Mario</div>
<div><br>
</div>
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<div style="color: rgb(0, 0, 0); letter-spacing: normal;
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<span
class="Apple-converted-space"> </span></div>
<div style="color: rgb(0, 0, 0); letter-spacing: normal;
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word-wrap: break-word; -webkit-nbsp-mode: space;
-webkit-line-break: after-white-space;">Dr. Mario Manuel<br>
Einstein Postdoctoral Fellow, Smithsonian
Astrophysical Observatory<br>
<a moz-do-not-send="true" href="mailto:mmanuel@umich.edu">mmanuel@umich.edu</a><br>
617-899-8381<br>
<br>
University of Michigan<br>
Space Research Building<br>
2455 Hayward Street<br>
Ann Arbor, MI 48109<br>
Office: 734-764-4585<br>
</div>
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-webkit-line-break: after-white-space;">______________________________________</div>
</div>
</div>
<br>
<div>
<div>On Sep 16, 2014, at 4:40 AM, Roman Yurchak <<a
moz-do-not-send="true" href="mailto:roman.yurchak@crans.org">roman.yurchak@crans.org</a>>
wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">
<div style="font-size: 12px; font-style: normal; font-variant:
normal; font-weight: normal; letter-spacing: normal;
line-height: normal; orphans: auto; text-align: start;
text-indent: 0px; text-transform: none; white-space: normal;
widows: auto; word-spacing: 0px; -webkit-text-stroke-width:
0px;">Hi Mario,<br>
<br>
I think you must be missing the the lrefine_min_init
parameter in your<br>
flash.par that sets the minimum number of refinement levels
at init time.<br>
<br>
For instance with nxb==nxy==16, to resolve a 0.27um
perturbation, I<br>
assume you would want at least<br>
lrefine_max = 8 # with max resolution 300./(16*(2**(8-1)) =
0.146 µm<br>
then you would have to set<br>
lrefine_min_init = 2 # i.e. 9.375 µm, as with a default
value of 1<br>
(=18.75µm) you are on the limit of detecting the foil at
init time.<br>
<br>
Besides, it is advised to have square simulations cells,
that can be<br>
achieved for a 300 um X 1200 um domain with<br>
nblockx = 1<br>
nblocky = 4<br>
<br>
Best,<br>
--<span class="Apple-converted-space"> </span><br>
Roman Yurchak<br>
PhD student<br>
Laboratoire LULI<br>
Ecole Polytechnique, France<br>
<br>
<br>
On 15/09/14 23:49, Mario Manuel wrote:<br>
<blockquote type="cite">Hi,<br>
<br>
I am trying to setup a simulation that looks at RT growth
of seeded<br>
perturbations on a laser-accelerated foil. The foil
parameters I'd like<br>
to implement is a 21um thick foil with a 0.27um sinusoidal
amplitude<br>
perturbation on it. I have altered the LaserSlab
simulation initBlock to<br>
do this and I can successfully create a 21um thick foil
with a 2um<br>
perturbation, but as I try to make the perturbation
smaller, the foil<br>
entirely disappears from the domain. I have tried to
change the<br>
lrefine_max parameter to get the resolution I need, but
have been thus<br>
far unsuccessful at getting down to the sub micron level
that i need to<br>
run the simulation. I also ran the ./setup with nxb=32 and
nyb=32 to try<br>
to get at the problem, but still to no avail.<br>
<br>
The domain is rather large, 300 um X 1100 um, due to the
fact that I<br>
need to have some computational space given to the
laser-plasma<br>
interaction and to allow the foil to accelerate and move
during the<br>
simulation.<br>
<br>
Any thoughts on how I could better implement my problem?<br>
<br>
Cheers,<br>
Mario<span class="Apple-converted-space"> </span><br>
<br>
______________________________________<br>
<br>
<br>
Dr. Mario Manuel<br>
Einstein Postdoctoral Fellow, Smithsonian Astrophysical
Observatory<br>
<a moz-do-not-send="true" href="mailto:mmanuel@umich.edu">mmanuel@umich.edu</a><span
class="Apple-converted-space"> </span><<a
moz-do-not-send="true" href="mailto:mmanuel@umich.edu">mailto:mmanuel@umich.edu</a>><br>
617-899-8381<br>
<br>
University of Michigan<br>
Space Research Building<br>
2455 Hayward Street<br>
Ann Arbor, MI 48109<br>
Office: 734-764-4585<br>
______________________________________<br>
<br>
</blockquote>
<br>
<br>
--<span class="Apple-converted-space"> </span><br>
Roman</div>
</blockquote>
</div>
<br>
</blockquote>
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