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<span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;"> 1520 Hmholtz TEMP 12 3.8789E-11 4.5120E+07 1.0000E-10</span><br>
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<p style="margin-top:0;margin-bottom:0">On Step 1520, it took 12 iterations to reach a residual of 3.8e-11, starting with a residual of 4.5e7, with target residual 1.e-10.</p>
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<p style="margin-top:0;margin-bottom:0">[ This is actually too tight of a tolerance, since you are asking for 17 orders of magnitude reduction in residual and are working only with 16 significant digits. It seems like you might need to change your .rea file
in the following way:</p>
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</p>
<p style="margin-top:0;margin-bottom:0"> set p21 and p22 to 0</p>
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</p>
<p style="margin-top:0;margin-bottom:0"> set p24, tolrel , to 1.e-3</p>
<p style="margin-top:0;margin-bottom:0"> set p25, tolabs, to 1.e-3</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0">The only time you'll need tolrel/abs tighter than this is if you're doing an analytic convergence study where you know the answer to an infinite number of digits. For engineering calculations, 1.e-2 to 1.e-3 is fine.
The residual tolerances are set conservatively based on these input values.</p>
<p style="margin-top:0;margin-bottom:0"><br>
</p>
<p style="margin-top:0;margin-bottom:0"><span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;"> 1520 Helmh3 fluid 17 3.6594E-11 4.7524E-01 1.0000E-10</span><br style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;">
<span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;"> 1520 U-PRES gmres 120 1.3494E-08 4.5675E-06</span><br style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;">
<span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;">1.0000E-10 7.8799E-01 3.0171E+00</span><br>
</p>
<p style="margin-top:0;margin-bottom:0"><span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;"><br>
</span></p>
<p style="margin-top:0;margin-bottom:0"><span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;">You have 17 iterations for the moment equations. </span></p>
<p style="margin-top:0;margin-bottom:0"><span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;"><br>
</span></p>
<p style="margin-top:0;margin-bottom:0"><span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, 'Segoe UI', 'Segoe WP', Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;">You have 120 iterations for pressure. Again, your tolerances
are too tight for engineering </span><font color="#212121" face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size: 15px;">calculations -- you do not need 1.e-10 for divergence (i.e., for the pressure
residual tolerance).</span></font></p>
<p style="margin-top:0;margin-bottom:0"><font color="#212121" face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size: 15px;"><br>
</span></font></p>
<p style="margin-top:0;margin-bottom:0"><font color="#212121" face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size: 15px;">hth,</span></font></p>
<p style="margin-top:0;margin-bottom:0"><font color="#212121" face="wf_segoe-ui_normal, Segoe UI, Segoe WP, Tahoma, Arial, sans-serif, serif, EmojiFont"><span style="font-size: 15px;">Paul</span></font></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nek5000-users <nek5000-users-bounces@lists.mcs.anl.gov> on behalf of nek5000-users@lists.mcs.anl.gov <nek5000-users@lists.mcs.anl.gov><br>
<b>Sent:</b> Friday, March 30, 2018 4:52:26 AM<br>
<b>To:</b> nek5000-users@lists.mcs.anl.gov<br>
<b>Subject:</b> Re: [Nek5000-users] logfile</font>
<div> </div>
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<div class="BodyFragment"><font size="2"><span style="font-size:11pt;">
<div class="PlainText">The following is my logfile entry (sample lines). The first line is<br>
understandable. What do the values in the third and following lines<br>
denote?<br>
<br>
<br>
------------------------------------------------------<br>
Step 1520, t= 7.6000000E-02, DT= 5.0000000E-05, C= 0.072 5.3831E+03<br>
3.5403E+00<br>
Solving for Hmholtz scalars<br>
1520 Hmholtz TEMP 12 3.8789E-11 4.5120E+07 1.0000E-10<br>
1520 Scalars done 7.6000E-02 8.3823E-02<br>
Solving for fluid<br>
1520 Helmh3 fluid 17 3.6594E-11 4.7524E-01 1.0000E-10<br>
1520 U-PRES gmres 120 1.3494E-08 4.5675E-06<br>
1.0000E-10 7.8799E-01 3.0171E+00<br>
1520 Fluid done 7.6000E-02 3.3650E+00<br>
--------------------------------------------------------<br>
<br>
On Fri, Mar 30, 2018 at 3:05 PM, <nek5000-users@lists.mcs.anl.gov> wrote:<br>
> I am not sure what you are talking about?<br>
><br>
> -----Original message-----<br>
>> From:nek5000-users@lists.mcs.anl.gov <nek5000-users@lists.mcs.anl.gov><br>
>> Sent: Friday 30th March 2018 10:30<br>
>> To: nek5000-users@lists.mcs.anl.gov<br>
>> Subject: [Nek5000-users] logfile<br>
>><br>
>> Hi Neks,<br>
>><br>
>> What are the entries in the logfile that is output from running<br>
>> the code. Please let me know where the entries are determined in the<br>
>> code.<br>
>><br>
>> Thanks<br>
>> Swarandeep<br>
>> _______________________________________________<br>
>> Nek5000-users mailing list<br>
>> Nek5000-users@lists.mcs.anl.gov<br>
>> <a href="https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users">https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users</a><br>
>><br>
> _______________________________________________<br>
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