<div dir="ltr">Hi Marissa. <div><br></div><div>Thank you very much for your answer! <br><div><br></div></div></div><div dir="ltr"><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">El lun, 14 feb 2022 a las 13:31, Marissa B. P. Adams (<<a href="mailto:madams@pas.rochester.edu" target="_blank">madams@pas.rochester.edu</a>>) escribió:<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 Ernesto,<div><br></div><div>The short answer: no.</div><div><br></div><div>More explanation: FLASH advances the total momentum equation for the system; therefore everything is treated as a single fluid, however that fluid is composed of three "species" (in flash terms) as you have pointed out via the 3T treatment. There are other codes that follow a comparable prescription with two-temperatures, such as GORGON (see the thesis by Benjamin Khiar). I would recommend looking at 14.3+ of the user manual (you probably have already). Long story short 3T/2T =/= 2-fluid.</div><div><br></div><div>Aside: One can then make the approximation that given the ions are 43 times heavier than the electrons for even the lightest element (Z=1) that this is a fine assumption, and one can fold in the electron equation of motion into the induction equation that advances the Generalized Ohm's Law. I am not stating that this is what single-fluid MHD codes with x-MHD capabilities "do," but it is one perspective of viewing the single-fluid treatment if albeit physically flawed. </div><div><br></div><div>I hope this helps, or at least clarifies/makes some sense :)</div><div><br></div><div>Have a nice day!</div><div>Marissa</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Feb 14, 2022 at 11:20 AM Ernesto Zurbriggen <<a href="mailto:ezurbriggen@unc.edu.ar" target="_blank">ezurbriggen@unc.edu.ar</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">Hello everyone. <div><br></div><div>I wonder if it is possible to perform 2-fluids (fully ionised plasma, i.e. electrons+ions) mhd simulations in flash using the unsplit staggered mesh solver. </div><div><br></div><div>In the user manual I saw flash allows unsplit hydrodynamic + 3-temperatures (electron, ions, radiation), but I'm not sure if this is the same or customisable to a strict 2-fluid MHD scenario. <br><div><br></div></div><div>Any information would be appreciated. </div><div>Best regards! </div><div>Ernesto. </div></div>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><font face="monospace" size="1" color="#000000">%---------------------------------------------%</font><div><font face="monospace" size="1" color="#000000">Marissa B. P. Adams</font></div><div><font face="monospace" size="1" color="#000000">(she/her/hers)</font></div><div><font face="monospace" size="1" color="#000000">Phd Candidate, University of Rochester</font></div><div><font size="1"><b style="color:rgb(0,0,0);font-family:monospace">E-mail:</b><span style="color:rgb(0,0,0);font-family:monospace"> <a href="mailto:madams@pas.rochester.edu" target="_blank">madams@pas.rochester.edu</a></span><br></font></div><div><font face="monospace" size="1" color="#000000"><b>Website:</b> <a href="http://www.pas.rochester.edu/~madams#" target="_blank">https://www.pas.rochester.edu/~madams</a></font></div><div><font size="1"><b style="color:rgb(0,0,0);font-family:monospace">Current Location:</b><br></font></div><div><font color="#000000" face="monospace" size="1">Occupied Seneca Land</font></div><div><font color="#000000" face="monospace" size="1">471 Bausch and Lomb Hall</font></div><div><font color="#000000" face="monospace" size="1">University of Rochester</font></div><div><font color="#000000" face="monospace" size="1">Rochester, NY 14627</font></div></div></div></div></div></div>
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