<div dir="auto">That could be one easy workaround, but it specifically depends on your needs (i.e. the region in which you need more accuracy, the resolution you are interested in and most of all the resources that are available to you).<div dir="auto"><br></div><div dir="auto">Best,</div><div dir="auto">Federico Cipolletta.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il lun 14 giu 2021, 12:06 Lorenzo Ennoggi <<a href="mailto:lorenzo.ennoggi@gmail.com">lorenzo.ennoggi@gmail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Federico,<div>great to hear from you! And thank you for your quick answer. So you are suggesting to enlarge the finest refinement level a bit more, right?</div><div><br></div><div>Thank you,</div><div>Lorenzo</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il giorno lun 14 giu 2021 alle ore 11:56 Federico Cipolletta <<a href="mailto:cipo87@gmail.com" target="_blank" rel="noreferrer">cipo87@gmail.com</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Hello Lorenzo,<div dir="auto"><br></div><div dir="auto">I recall that I obtained something similar to what you are describing, when attempting a regrinding for very small radii of the finest refinement level (let's say a most refinement radius near 5.0).</div><div dir="auto"><br></div><div dir="auto">I wasn't able to control precisely this setting and I concluded that it could be related to the number of buffer/ghost zones that are required (of course it also depends on the most refined resolution, though).</div><div dir="auto"><br></div><div dir="auto">Adopting greater radii, instead, it seems that I could have better control.</div><div dir="auto"><br></div><div dir="auto">I am sorry of not being of any more help and I wonder if someone could add more.</div><div dir="auto"><br></div><div dir="auto">Best regards,</div><div dir="auto">Federico Cipolletta.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">Il lun 14 giu 2021, 11:45 <<a href="mailto:users-request@einsteintoolkit.org" target="_blank" rel="noreferrer">users-request@einsteintoolkit.org</a>> ha scritto:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Send Users mailing list submissions to<br>
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Today's Topics:<br>
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1. Issue with thorn Trigger (Lorenzo Ennoggi)<br>
<br>
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----------------------------------------------------------------------<br>
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Message: 1<br>
Date: Mon, 14 Jun 2021 11:45:37 +0200<br>
From: Lorenzo Ennoggi <<a href="mailto:lorenzo.ennoggi@gmail.com" rel="noreferrer noreferrer" target="_blank">lorenzo.ennoggi@gmail.com</a>><br>
Subject: [Users] Issue with thorn Trigger<br>
To: <a href="mailto:users@einsteintoolkit.org" rel="noreferrer noreferrer" target="_blank">users@einsteintoolkit.org</a><br>
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Content-Type: text/plain; charset="utf-8"<br>
<br>
Dear all,<br>
I would like to restart a simulation from a checkpoint enlarging the finest<br>
refinement level in my grid. In particular, I would like to change<br>
CarpetRegrid2::radius_1[5]<br>
= 20.1 to CarpetRegrid2::radius_1[5] = 25. I tried to do that by making the<br>
parameter CarpetRegrid2::radius_1 always steerable and adding the<br>
following lines to my parameter file:<br>
<br>
<br>
ActiveThorns = "Trigger"<br>
Trigger::Trigger_Number = 1<br>
<br>
Trigger::Trigger_Checked_Variable[0] = "hydrobase::rho"<br>
Trigger::Trigger_Relation[0] = ">"<br>
Trigger::Trigger_Checked_Value[0] = 1.e-4<br>
Trigger::Trigger_Reduction[0] = "maximum"<br>
<br>
Trigger::Trigger_Reaction[0] = "steerparam"<br>
Trigger::Trigger_Steered_Parameter_Thorn[0] = "CarpetRegrid2"<br>
Trigger::Trigger_Steered_Parameter_Name[0] = "radius_1[5]"<br>
Trigger::Trigger_Steered_Parameter_Value[0] = "25." #New value of the above<br>
parameter<br>
Trigger::Trigger_Once[0] = 1 #It means "yes"<br>
Trigger::Trigger_Debug = 1 #It means "yes"<br>
<br>
<br>
In this way, the trigger should act immediately, as the maximum of rho is<br>
~1e-3 in my case. Indeed, it looks like the trigger is working fine, as the<br>
standard output says<br>
<br>
[...]<br>
INFO (Trigger): Testing triggers<br>
INFO (Trigger): last_checked: -1<br>
INFO (Trigger): reducing trigger 0 red_handle 2 varindex 428<br>
INFO (Trigger): reducing was ok<br>
INFO (Trigger): trigger nr. 0 fullfilled for rho (0.000804>0.000100)<br>
INFO (Trigger): Steering parameter<br>
INFO (Trigger): Parameter steered<br>
[...]<br>
<br>
but unfortunately, looking at the 2D output with VisIt, the finest<br>
refinement level does not get enlarged (i.e. radius_1[5] does not appear to<br>
have been steered at all). Do you have any suggestions on how to get this<br>
trigger to work? Or, are you aware of other ways of obtaining the same<br>
result without using the thorn Trigger?<br>
<br>
I attach the parameter file in case you need it.<br>
<br>
Thank you very much in advance for your help.<br>
<br>
Sincerely,<br>
Lorenzo Ennoggi<br>
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