<div dir="ltr"><div>Dear Ryan,</div><div><br></div><div>FLASH development will continue leveraging Paramesh for the time being, while we accelerate select compute-heavy physics modules with GPUs for new and future architectures. The GPU capabilities are now being tested and slated for the next major FLASH release, later this calendar year. <br></div><div><br></div><div>With warm best wishes,</div><div>-- Petros</div><div><br></div><div><br></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Feb 28, 2023 at 12:28 PM Ryan Farber <<a href="mailto:rjfarber@umich.edu" target="_blank">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="ltr">Hi Eddie, since you mentioned active development, do you know if there's any status update for FLASH 5.0? Or plans for FLASH 4.X to upgrade from PARAMESH/Chombo to AMReX or other grids that can scale to leverage new/upcoming exaflop machines?<div><br></div><div>Best,<br clear="all"><div><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div dir="ltr">--------<div>Ryan</div></div></div></div></div></div></div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Feb 28, 2023 at 3:52 PM Hansen, Eddie <<a href="mailto:ehansen@pas.rochester.edu" target="_blank">ehansen@pas.rochester.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>
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<p class="MsoNormal"><span style="font-size:11pt">Hi Zhang,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">The ZPinch example problem is not specific to any experiment, so a general Z-pinch only requires an azimuthal field. That being said, FLASH 4.7 does indeed support the implicit diffusion of an axial field
but only for uniform grid setups (+ug). We are actively working on implementing AMR support for future releases.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11pt;color:black">--</span><span style="color:black"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:rgb(24,26,27)">Eddie Hansen</span><span style="color:black"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:rgb(24,26,27)">Research Scientist</span><span style="color:black"><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:12pt;font-family:Arial,sans-serif;color:rgb(24,26,27)">Flash Center for Computational Science</span><span style="color:black"><u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
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<p class="MsoNormal" style="margin-bottom:12pt"><b><span style="font-size:12pt;color:black">From:
</span></b><span style="font-size:12pt;color:black">flash-users <<a href="mailto:flash-users-bounces@flash.rochester.edu" target="_blank">flash-users-bounces@flash.rochester.edu</a>> on behalf of Zhang Daoyuan <<a href="mailto:zdy0903@stu.xjtu.edu.cn" target="_blank">zdy0903@stu.xjtu.edu.cn</a>><br>
<b>Date: </b>Tuesday, February 28, 2023 at 9:08 AM<br>
<b>To: </b><a href="mailto:flash-users@flash.rochester.edu" target="_blank">flash-users@flash.rochester.edu</a> <<a href="mailto:flash-users@flash.rochester.edu" target="_blank">flash-users@flash.rochester.edu</a>><br>
<b>Subject: </b>[FLASH-USERS] Is the implicit magnetic diffusion solver can be used for axial magnetic field in FLASH4.7<u></u><u></u></span></p>
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<pre><span style="font-size:10.5pt;font-family:SimSun">Dear Flash Developers,<u></u><u></u></span></pre>
<pre><span style="font-size:10.5pt;font-family:SimSun"><u></u> <u></u></span></pre>
<pre><span style="font-size:10.5pt;font-family:SimSun">Thank you for the release of FLASH4.7. I want to ask if the newly added implicit magnetic diffusion solver can be used for axial magnetic field in R-Z 2D simulation. When I look at the "Zpinch" simulation example, I find that the axial magnetic field is not initialized. This is weird because I believe the "Zpinch" case is actually an example of MagLIF experiment. It should have axial magnetic field.<u></u><u></u></span></pre>
<pre><span style="font-size:10.5pt;font-family:SimSun">Can we use the axial magnetic field in Zpinch simulation? Thank you very much! <u></u><u></u></span></pre>
<pre><span style="font-size:10.5pt;font-family:SimSun"><u></u> <u></u></span></pre>
<pre><span style="font-size:10.5pt;font-family:SimSun">Yours<u></u><u></u></span></pre>
<pre><span style="font-size:10.5pt;font-family:SimSun">Zhang<u></u><u></u></span></pre>
<pre><span style="font-size:10.5pt;font-family:SimSun"><u></u> <u></u></span></pre>
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</blockquote></div><br clear="all"><br>-- <br><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><span>*************************************************************************</span></div><div dir="ltr"><span></span>Petros Tzeferacos (he / him / his)<div><br></div><div>Director, Flash Center for Computational Science <br></div><div>Associate Professor, Dept. of Physics and Astronomy<br></div><span>Senior Scientist, Laboratory for Laser Energetics</span> <br><div>University of Rochester</div><div>Bausch and Lomb Hall, 370 <br></div><div>500 Wilson Blvd. PO Box 270171, Rochester, NY 14627<br></div><div><div><span></span></div><span></span></div><div>Office 585-275-6751 Cell 773-484-3085<br></div><div dir="ltr">Email <a href="mailto:p.tzeferacos@rochester.edu" target="_blank">p.tzeferacos@rochester.edu</a></div><div>Web <a href="https://flash.rochester.edu" target="_blank">https://flash.rochester.edu<br><img src="https://ci3.googleusercontent.com/mail-sig/AIorK4w0PLPYqxH67RGgw_mkyc7S-Jaanvdy8SeA5YMgD3DC2LApjlgUtoBoQrFSFujwAG4OsLt06Zs" width="200" height="73"><br></a></div><div>*************************************************************************</div></div></div></div></div></div></div></div></div></div></div></div></div></div></div>