<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">Hi Sumit,<div><br></div><div>Thank you for attaching your log file. You set sim_rInit to ~ 0.01 but your linear box dimensions are 1. That means the initial linear resolution is 0.125 > sim_rInit and no refinement occurs.</div><div><br></div><div>Increase lrefine_min (or the similar parameter for the initial refinement) or increase sim_rInit.</div><div><br></div><div>Best wishes,</div><div>Ryan<br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On 10. Jul 2025, at 07:13, Sumit Banerjee <sumitb@g.clemson.edu> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div>Ryan,</div><div><br></div><div>My bad. That was a type indeed. I meant the parameters zmin and zmax. I cross checked them in the par file and they appear fine. I have attached the parameter file here for your reference. Also attached is the log file generated by the run.</div><div><br></div><div>Let me know if you find something.</div><div><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><i><font face="verdana, sans-serif">Clear Skies,</font></i><div><i><font face="verdana, sans-serif">Sumit (Sam)</font></i></div></div></div></div><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Jul 9, 2025 at 6:57 PM Ryan Farber <<a href="mailto:rjfarber@umich.edu">rjfarber@umich.edu</a>> wrote:<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">Hi Sumit,<div><br></div><div>The parameter names are zmin and zmax, not z_min and z_max. Maybe that’s one issue.</div><div><br></div><div>Anyway, from what you shared there’s just a single block (no refinement occurred). The question is why. It’d be helpful if you shared your.log file.</div><div><br></div><div>If you’re just trying to run the default Sedov problem in 3D with only changes in flash.par I’m a bit surprised you have this issue. Though as you wrote, setting lrefine_min can be helpful if you aren’t initially resolving the features you’re trying to refine on.</div><div><br></div><div>Best wishes,</div><div>Ryan<br><br><div dir="ltr">Sent from my iPhone</div><div dir="ltr"><br><blockquote type="cite">On 9. Jul 2025, at 15:43, Sumit Banerjee <<a href="mailto:sumitb@g.clemson.edu" target="_blank">sumitb@g.clemson.edu</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><div dir="ltr"><div>Flash users,</div><div><br></div><div>I hope everything is fine.</div><div><br></div><div>I am trying to run the Sedov explosion in 3D and I changed the flash.par by adding the parameters, z_min, z_max, zl_boundary_type and zr_boundary_type. However, when I run the simulation, it reaches the max simTime real quick and the output files do not show any explosion. Below is the output of the run..</div><div><br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"> Grid_init: resolution based on runtime params:<br> lrefine dx dy dz<br> 1 0.125 0.125 0.125<br> 2 0.062 0.062 0.062<br> 3 0.031 0.031 0.031<br> 4 0.016 0.016 0.016<br> 5 0.008 0.008 0.008<br> 6 0.004 0.004 0.004<br> MaterialProperties initialized<br> Cosmology initialized<br> Source terms initialized<br> sim_rhoAmbient is 1.0000000000000000<br> iteration, no. not moved = 0 0<br> refined: total leaf blocks = 1<br> refined: total blocks = 1<br> [amr_morton_process]: Initializing surr_blks using standard orrery implementation<br> Finished with Grid_initDomain, no restart<br> Ready to call Hydro_init<br> Hydro initialized<br> Gravity initialized<br> Initial dt verified<br> *** Wrote checkpoint file to sedov_hdf5_chk_0000 ****<br> *** Wrote plotfile to sedov_hdf5_plt_cnt_0000 ****<br> Initial plotfile written<br> Driver init all done<br> n t dt ( x, y, z) | dt_hydro dt_Diff<br> 1 1.0000E-10 2.0000E-10 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 2 3.0000E-10 4.0000E-10 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 3 7.0000E-10 8.0000E-10 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 4 1.5000E-09 1.6000E-09 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 5 3.1000E-09 3.2000E-09 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 6 6.3000E-09 6.4000E-09 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 7 1.2700E-08 1.2800E-08 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 8 2.5500E-08 2.5600E-08 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 9 5.1100E-08 5.1200E-08 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 10 1.0230E-07 1.0240E-07 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 11 2.0470E-07 2.0480E-07 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 12 4.0950E-07 4.0960E-07 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 13 8.1910E-07 8.1920E-07 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 14 1.6383E-06 1.6384E-06 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 15 3.2767E-06 3.2768E-06 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 16 6.5535E-06 6.5536E-06 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 17 1.3107E-05 1.3107E-05 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 18 2.6214E-05 2.6214E-05 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 19 5.2429E-05 5.2429E-05 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 20 1.0486E-04 1.0486E-04 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 21 2.0972E-04 2.0972E-04 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 22 4.1943E-04 4.1943E-04 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 23 8.3886E-04 8.3886E-04 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 24 1.6777E-03 1.6777E-03 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 25 3.3554E-03 3.3554E-03 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 26 6.7109E-03 6.7109E-03 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 27 1.3422E-02 1.3422E-02 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 28 2.6844E-02 2.6844E-02 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 29 5.3687E-02 5.3687E-02 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> 30 1.0737E-01 1.0737E-01 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> *** Wrote checkpoint file to sedov_hdf5_chk_0001 ****<br> 31 2.1475E-01 2.1475E-01 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> *** Wrote checkpoint file to sedov_hdf5_chk_0002 ****<br> 32 4.2950E-01 4.2950E-01 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> *** Wrote checkpoint file to sedov_hdf5_chk_0003 ****<br> 33 8.5899E-01 8.5899E-01 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> *** Wrote checkpoint file to sedov_hdf5_chk_0004 ****<br> 34 1.7180E+00 1.7180E+00 ( 6.250E-02, 6.250E-02, 6.250E-02) | 2.673E+01 6.250E+27<br> *** Wrote checkpoint file to sedov_hdf5_chk_0005 ****<br> exiting: reached max SimTime<br> *** Wrote plotfile to sedov_forced_hdf5_plt_cnt_0000 ****</blockquote><div><br></div><div>I tried reading through the past issues and found out a suggestion to increase the parameters lrefine_min or lrefine_min_init but they aren't there in the flash.par file under the source/Simulation/SimulationMain/Sedov/flash.par file. I tried checking a few par files written for 3D runs but couldn't find anything useful yet.</div><div><br></div><div>I tried running the Sod problem in 3D and it runs successfully with the similar adjustments to the par file as above so I have no idea what's going on here.</div><div><br></div><div>Could somebody explain what is going on and how I can get over this problem? </div><div><br></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><i><font face="verdana, sans-serif">Clear Skies,</font></i><div><i><font face="verdana, sans-serif">Sumit (Sam)</font></i></div></div></div></div></div>
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