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The user guide is referring to implicit magnetic diffusion. That one is not yet supported for AMR. Currently, the implicit diffusion solvers with AMR are for thermal conduction and radiation only.
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<div dir="auto" style="">Eddie Hansen | Research Scientist</div>
<div dir="auto" style="">Flash Center for Computational Science</div>
<div dir="auto" style="">Dept. of Physics and Astronomy</div>
<div dir="auto" style="">University of Rochester, Rochester, NY</div>
<div dir="auto" style="">Cell 607-341-6126 | flash.rochester.edu</div>
<div dir="auto" style="">(he / him / his)</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> flash-users <flash-users-bounces@flash.rochester.edu> on behalf of Madhav Nagori <mnagori@uncc.edu><br>
<b>Sent:</b> Wednesday, April 5, 2023 10:31:48 AM<br>
<b>To:</b> flash-users@flash.rochester.edu <flash-users@flash.rochester.edu><br>
<b>Subject:</b> [FLASH-USERS] Use of implicit diffusion solver with AMR</font>
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<div dir="ltr">Hello FLASH users and Development Team,
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<div>I want to use the implicit diffusion solver for some very high resolution cases of cell size 512*512*2048. For such high resolution, I want to use AMR as the uniform mesh will take months to run. </div>
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<div>The user guide tells that the paramesh is not available to the implicit diffusion solver. Is it possible to modify the code so that I can run with AMR? </div>
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<div>P.S: I am using mass diffusion, viscosity diffusion and thermal diffusion in my simulation. I tried using the explicit diffusion solver (Flux Based Diffusion) with AMR, but that gave wrong results. However, the implicit solver is providing the correct
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<div>Please let me know.</div>
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<div>Thank You <br clear="all">
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<div style="color:rgb(34,34,34)">Best Regards,</div>
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<div style="color:rgb(34,34,34)">Madhav Nagori</div>
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<div style="color:rgb(34,34,34)">PhD Candidate | Laboratory for Multiscale Computational Fluid Dynamics</div>
<div style="color:rgb(34,34,34)">Department of Mechanical Engineering and Engineering Sciences</div>
<div style="color:rgb(34,34,34)">University of North Carolina at Charlotte</div>
<div style="color:rgb(34,34,34)">Office: Duke 273, 9330 Robert D. Snyder Rd, Charlotte, NC 28262, USA</div>
<div style="color:rgb(34,34,34)">Email: <a href="mailto:mnagori@uncc.edu" target="_blank">
mnagori@uncc.edu</a><br>
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<div style="color:rgb(34,34,34)">LinkedIn: <a href="http://www.linkedin.com/in/madhav-nagori" target="_blank">
www.linkedin.com/in/madhav-nagori</a></div>
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