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<p>Dear Kiya,</p>
<p><br>
</p>
<p>I do not have a particular parfile nor a concrete FLASH setup to </p>
<p>recommend, I am still somewhat of a FLASH novice. I am not sure</p>
<p>what exact spatial resolution your setup results in, what are the smallest</p>
<p>and largest grid cells you have in the core during bounce? </p>
<p><br>
</p>
<p>Changing the timestep factor might not have solved your problem, but it</p>
<p>improved it. Your simulation now progresses further and I am willing to bet</p>
<p>that a greater constraint on the timestep will allow even further progress.</p>
<p>I suspect that the problem is indeed related to the rapid changes occurring during</p>
<p>bounce. Plotting the central density, temperature and pressure might help you</p>
<p>check if is indeed the case. You can also continue to increase your temporal and</p>
<p>spatial resolution and check if your simulation progresses further and further.</p>
<p><br>
</p>
<p>Best,<br>
Haakon</p>
<p><br>
</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> kiyarash Taghiniyarami <kiyarash.niyarami@gmail.com><br>
<b>Sent:</b> 15 May 2022 19:09:59<br>
<b>To:</b> Haakon Andresen; flash-users@flash.rochester.edu<br>
<b>Subject:</b> Re: [FLASH-USERS] 2D SN Core-Collapse Leakage scheme problem</font>
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<div dir="ltr">Dear Haakon Andresen,<br>
<br>
Thanks for your reply. for the second error do you have any parfile or time and resolution available to suggest?<br>
I changed the resolution to:<br>
# Grid / Refinement<br>
nblockx = 15<br>
nblocky = 30<br>
nblockz = 1<br>
<br>
gr_lrefineMaxRedDoByLogR = .true.<br>
gr_lrefineMaxRedDoByTime = .FALSE.<br>
gr_lrefineMaxRedLogBase = 10.0<br>
gr_lrefineMaxRedRadiusFact = 0.15<br>
gr_lrefineMaxRedTRef = 2.0 <br>
gr_lrefineMaxRedTimeScale = 0.5<br>
lrefine_max = 11 <br>
nrefs = 2<br>
lrefine_min = 1<br>
refine_var_1 = "dens"<br>
refine_var_2 = "pres"<br>
refine_var_3 = "entr"<br>
refine_var_4 = "none"<br>
refine_cutoff_1 = 0.8 <br>
refine_cutoff_2 = 0.8<br>
refine_cutoff_3 = 0.8<br>
refine_cutoff_4 = 0.8<br>
<br>
but this time instead of 231 ms it gave me the same error at later time (260 ms). changing the
<b>tstep_change_factor </b> , and <b>dtinit</b> did not resolve the issue.<br>
<br>
Kind regards,<br>
Kiya</div>
<br>
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<div dir="ltr" class="gmail_attr">On Sun, May 15, 2022 at 1:42 PM Haakon Andresen <<a href="mailto:haakon.andresen@astro.su.se">haakon.andresen@astro.su.se</a>> wrote:<br>
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<p>Dear Kiyarash Taghiniyarami,</p>
<p><br>
</p>
<p>The first error (for LS180) seem to indicate a lack of storage space on your drive. </p>
<p>You see this written by the error handler in your first screenshot. Make sure that there is space</p>
<p>and that you are not trying to create files larger than the maximum filesize allowed by your system. </p>
<p><br>
</p>
<p>The second errors seems to be related to physics. During bounce things change very fast and it </p>
<p>might be that you need to reduce your timestep during this time. However, I am not sure about this</p>
<p>because I do not know exactly how flash regulates the timestep. The error is in the EOS module where the</p>
<p>routine fails to converge, I have seen this happen around bounce and for me it always helped to restrict dt or</p>
<p>the resolution. However, I was working with an other code at the time.</p>
<p><br>
</p>
<p>Best,<br>
Haakon Andresen</p>
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<div id="gmail-m_1816844387868435849divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> flash-users <<a href="mailto:flash-users-bounces@flash.rochester.edu" target="_blank">flash-users-bounces@flash.rochester.edu</a>>
on behalf of kiyarash Taghiniyarami <<a href="mailto:kiyarash.niyarami@gmail.com" target="_blank">kiyarash.niyarami@gmail.com</a>><br>
<b>Sent:</b> 15 May 2022 10:03:41<br>
<b>To:</b> <a href="mailto:flash-users@flash.rochester.edu" target="_blank">flash-users@flash.rochester.edu</a><br>
<b>Subject:</b> [FLASH-USERS] 2D SN Core-Collapse Leakage scheme problem</font>
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<div dir="ltr">Dear all FLASH users,<br>
I tried to run 2D supernova core collapse for two different nuclear EOS of Lattimer and Sewsty (<a href="https://ttt.astro.su.se/~eoco/eos.html" id="gmail-m_1816844387868435849LPlnk532912" target="_blank">https://ttt.astro.su.se/~eoco/eos.html</a>) with K=180
and K=220 but I got the errors which I attached the images of them.<br>
for the case of k=220 it runs into problem after 231 ms (it seems before the bounce) and for k=180 just after 24 ms<br>
Could anyone tell me what I have done wrong? <br>
(changing the resolution also did not resolve the issue)<br>
<br>
P.S. Trying to compile the FLASH, I also changed the Flash.h file and replace the line as Dr. O'Connor proposed:<br>
<span style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:16px">#FLASH_HAVE_HDF5_MOD</span><br>
<div><span style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:16px">with</span></div>
<div><span style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:16px">#define IO_USE_HDF5_MOD 1<br>
</span><span style="color:rgb(0,0,0);font-family:Calibri,Helvetica,sans-serif,Helvetica,EmojiFont,"Apple Color Emoji","Segoe UI Emoji",NotoColorEmoji,"Segoe UI Symbol","Android Emoji",EmojiSymbols;font-size:16px"><br>
I also attached the sample flash.par file</span></div>
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