<div dir="ltr"><div>Hello Frank,<br></div>Thank you for suggestions.<br><div><div><div><div><div><div id="dc_vk_code" style></div><div class="gmail_extra"><br><br><div class="gmail_quote">On Wed, Jun 19, 2013 at 10:11 PM, Frank Loeffler <span dir="ltr"><<a href="mailto:knarf@cct.lsu.edu" target="_blank">knarf@cct.lsu.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hi Petr,<br>
<div class="im"><br>
On Tue, Jun 18, 2013 at 02:42:07PM -0400, Petr Tsatsin wrote:<br>
> 1) I just tried to run some of my "old" parameter files using the new ET<br>
> release and I got some strange results. The parameter files which work<br>
> completely fine for previous releases do not work anymore in a sense that<br>
> for example for the binary neutron star simulations starting from LORENE<br>
> initial data hamiltonian constraint blows up and central density become nan<br>
> shortly after the beginning. Thus, I have a question are there any<br>
> essential changes I need to incorporate in my par files due to the new<br>
> release or the old par files should in principle work and give same results<br>
> as before?<br>
<br>
</div>With these symptoms I would first look at the initial data setup itself.<br>
Are all past timelevels setup correctly?</blockquote><div><br>What is the best way to check if past time levels are initialized properly? <br></div><div>I use the following parameters for the initial data:<br>InitBase::initial_data_setup_method = "init_some_levels"<br>
<br>ActiveThorns = "Meudon_Bin_NS"<br><br>ADMBase::initial_data = "Meudon_Bin_NS"<br>ADMBase::initial_lapse = "Meudon_Bin_NS"<br>ADMBase::initial_shift = "Meudon_Bin_NS"<br>
ADMBase::initial_dtlapse = "Meudon_Bin_NS"<br>ADMBase::initial_dtshift = "Meudon_Bin_NS"<br><br>Hydrobase::initial_hydro = "Meudon_Bin_NS"<br><br>Meudon_Bin_NS::filename = "path/to/file"<br>
<br></div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> In principle, the Lorene thorns<br>
should do that, but I could imagine tests not covering this. How does<br>
the data differ between an evolution using the old and the new release?<br></blockquote><div><br>I'm attaching the figure with minimum lapse evolution. it can be seen that lapse drops below 0.2 very quickly (several time steps).<br>
</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div class="im"><br>
> 2) I'm trying to use ML_CCZ4 for the spacetime evolution and I found the<br>
> example par file for BBH evolution in McLachlan/par/CCZ4/bbh_ccz4.par which<br>
> does not work. I figured that this file was for the old implementation of<br>
> the ccz4 inside ML_BSSN thorn and if I replace ML_BSSN with ML_CCZ4 and<br>
> comment some of the parameters it works. However, I was wondering if you<br>
> could provide a working example of such a file with ML_CCZ4?<br>
<br>
</div>I am sorry, I cannot directly help with this. I opened a ticket, which<br>
might help others do it: <a href="https://trac.einsteintoolkit.org/ticket/1387" target="_blank">https://trac.einsteintoolkit.org/ticket/1387</a><br></blockquote><div>Thank you. It would be very helpful to have working examples. <br>
</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<span class=""><font color="#888888"><br>
Frank<br>
<br>
</font></span></blockquote></div><br><br clear="all"><br>-- <br><div dir="ltr"><div>Petr Tsatsin</div><div>Graduate Student - Department of Physics</div><div>Charles E. Schmidt College of Science</div><div>Florida Atlantic University</div>
<div>(561)-297-3386</div><div>cell: 1-561-299-8048</div><div><a href="mailto:ptsatin@fau.edu" target="_blank">ptsatin@fau.edu</a>, <a href="mailto:ptsatsin@gmail.com" target="_blank">ptsatsin@gmail.com</a></div><div></div>
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