[FLASH-USERS] 回复： Hybird-PIC in FLASH

[王美乔]

Dear Dr. Holmstrom,
 
Thank you so much for your kind reply — I’m really glad to hear from you!
 
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.

 

Thanks again for developing the Hybrid-PIC solver in FLASH！！
 
Best regards,
 Joe
 University of Chinese Academy of Sciences (UCAS)





王美乔
2521795240 at qq.com



 




------------------ 原始邮件 ------------------
发件人:                                                                                                                        "Mats Holmstrom"                                                                                    <matsh at irf.se>;
发送时间: 2025年4月24日(星期四) 下午2:35
收件人: "flash-users"<flash-users at flash.rochester.edu>;

主题: Re: [FLASH-USERS] Hybird-PIC in FLASH




Hello Joe,
   I wrote the hybrid PIC solver in FLASH.

I am not aware of any works that couples fluid and particles, in FLASH, 
or any other MHD solver.

What usually is done is to take the MHD E and B fields and simulate test 
particles, but that does not give any coupling between fluid and particles.

An interesting idea, but not trivial to derive the math, algorithm and 
then implement it

Regards,
Mats Holmstrom
Swedish Institute of Space Physics


On 2025-04-23 18:31, 王美乔 wrote:
> Dear FLASH Team,
> 
> I hope this message finds you well.
> 
> I am currently using FLASH for some Hybrid-PIC research. I have noticed 
> that modeling all plasma components as particles is extremely 
> computationally expensive. To address this, I am attempting to treat 
> most of the low-energy plasma as a fluid, while representing the 
> high-energy portion as particles.
> 
> However, I have encountered several difficulties with this approach. I 
> would like to ask whether anyone on the team has experience with such a 
> setup. Specifically, is it possible to simulate both fluid and 
> Hybrid-PIC particles simultaneously in FLASH and allow them to interact 
> with or drive each other? If so, are there recommended methods, modules, 
> or example cases you could share?
> 
> Thank you very much for your help and advice!
> 
> 
> Best regards,
> Joe
> University of Chinese Academy of Sciences
> 
> 
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