<div dir="ltr"><div dir="ltr"><div>Dear All,</div><br>To add to the discussion, there has been an exciting new development from the Australian National University and <span class="gmail-al-author-name-more gmail-js-flyout-wrap"><span class="gmail-al-author-info-wrap gmail-arrow-up gmail-open" tabindex="-1">Radhika Achikanath Chirakkara,
</span></span><br><div><a href="https://doi.org/10.1093/mnras/stae2188">https://doi.org/10.1093/mnras/stae2188</a>, which we hope to incorporate in future FLASH releases and expand the capability to non-isothermal electrons and HEDP-relevant extended physics. The Flash Center is also currently exploring hybridization options with continuum kinetics, so watch this space. <br></div><div><br></div><div>With warm best wishes,</div><div>-- Petros</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, Apr 24, 2025 at 3:54 AM 王美乔 <<a href="mailto:2521795240@qq.com" target="_blank">2521795240@qq.com</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">
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<p>Dear Dr. Holmstrom,</p>
<p>Thank you so much for your kind reply — I’m really glad to hear from you!</p>
<p>As you mentioned, coupling fluid and Hybrid-PIC in a self-consistent way is indeed quite challenging. We’ve found that handling the collision effects between particles and the background fluid, as well as advancing
the electromagnetic fields properly, are among the most difficult aspects. We’re currently exploring possible approaches to address these issues, and we look forward to further discussions and exchanges with you.</p>
<p></p>
<p>Thanks again for developing the Hybrid-PIC solver in FLASH！！</p>
<p>Best regards,<br>
Joe<br>
University of Chinese Academy of Sciences (UCAS)</p>
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<div style="font-size:12px;font-family:Arial Narrow;padding:2px 0px">------------------ 原始邮件 ------------------</div>
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<div><b>发件人:</b> "Mats Holmstrom" <<a href="mailto:matsh@irf.se" target="_blank">matsh@irf.se</a>>;</div>
<div><b>发送时间:</b> 2025年4月24日(星期四) 下午2:35</div>
<div><b>收件人:</b> "flash-users"<<a href="mailto:flash-users@flash.rochester.edu" target="_blank">flash-users@flash.rochester.edu</a>>;</div>
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<div><b>主题:</b> Re: [FLASH-USERS] Hybird-PIC in FLASH</div>
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Hello Joe,<br>
I wrote the hybrid PIC solver in FLASH.<br>
<br>
I am not aware of any works that couples fluid and particles, in FLASH, <br>
or any other MHD solver.<br>
<br>
What usually is done is to take the MHD E and B fields and simulate test <br>
particles, but that does not give any coupling between fluid and particles.<br>
<br>
An interesting idea, but not trivial to derive the math, algorithm and <br>
then implement it<br>
<br>
Regards,<br>
Mats Holmstrom<br>
Swedish Institute of Space Physics<br>
<br>
<br>
On 2025-04-23 18:31, 王美乔 wrote:<br>
> Dear FLASH Team,<br>
> <br>
> I hope this message finds you well.<br>
> <br>
> I am currently using FLASH for some Hybrid-PIC research. I have noticed <br>
> that modeling all plasma components as particles is extremely <br>
> computationally expensive. To address this, I am attempting to treat <br>
> most of the low-energy plasma as a fluid, while representing the <br>
> high-energy portion as particles.<br>
> <br>
> However, I have encountered several difficulties with this approach. I <br>
> would like to ask whether anyone on the team has experience with such a <br>
> setup. Specifically, is it possible to simulate both fluid and <br>
> Hybrid-PIC particles simultaneously in FLASH and allow them to interact <br>
> with or drive each other? If so, are there recommended methods, modules, <br>
> or example cases you could share?<br>
> <br>
> Thank you very much for your help and advice!<br>
> <br>
> <br>
> Best regards,<br>
> Joe<br>
> University of Chinese Academy of Sciences<br>
> <br>
> <br>
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</blockquote></div><div><br clear="all"></div><br><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><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>
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