<meta http-equiv="Content-Type" content="text/html; charset=GB18030"><div><p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Verdana",sans-serif;
color:black;background:white">Dear Flash developers and engineers</span>,<span lang="EN-US"><o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Verdana",sans-serif;
mso-fareast-font-family:ËÎÌå;mso-bidi-font-family:ËÎÌå;color:black;mso-font-kerning:
0pt;mso-ligatures:none">In two-dimensional axisymmetric simulation, a thin
metal wire with high resistivity (diameter of tens of micrometers) flows
through a current, and the metal wire is surrounded by a vacuum outside. Within
a hundred nanoseconds, the actual situation should be that the current flows
through a low resistivity region, but currently, due to the magnetic field
diffusing from the outside to the inside, the internal metal diffusion
coefficient is too low. Now the current is concentrated at the vacuum metal
boundary rather than in the metal region. I used an implicit resistivitySolver,
but the final result did not match reality. Is there any good solution?</span><span lang="EN-US"><o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Verdana",sans-serif;
mso-fareast-font-family:ËÎÌå;mso-bidi-font-family:ËÎÌå;color:black;mso-font-kerning:
0pt;mso-ligatures:none">In addition, the process of implicit magnetic
diffusion should be a solution to the evolution of the global magnetic field,
and the magnetic field should have diffused at the initial moment. However, the
current implicit magnetic diffusion in flash seems to involve calculating the
diffusion of the magnetic field at each time step, resulting in slow diffusion
in areas with low magnetic diffusion coefficients. I still don't quite
understand the process of magnetic diffusion. </span><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Verdana",sans-serif;color:black;
background:white"> I would especially appreciate your patient answe</span><span style="mso-bidi-font-size:10.5pt;mso-ascii-font-family:Verdana;mso-hansi-font-family:
Verdana;color:black;background:white">£¡</span><span style="mso-bidi-font-size:
10.5pt;font-family:"Verdana",sans-serif;color:black;background:white"> <span lang="EN-US"><o:p></o:p></span></span></p>

<p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Verdana",sans-serif;
color:black;background:white"><span style="mso-spacerun:yes">                                                           
</span><span style="mso-spacerun:yes">             </span>Lizy<o:p></o:p></span></p>

<p class="MsoNormal" style="text-indent:21.0pt;mso-char-indent-count:2.0"><span lang="EN-US" style="mso-bidi-font-size:10.5pt;font-family:"Verdana",sans-serif;
color:black;background:white"><span style="mso-spacerun:yes">                                                            
</span><span style="mso-spacerun:yes"> </span>30,May,2024</span><span lang="EN-US"><o:p></o:p></span></p><br></div>