[FLASH-USERS] Disable particles

[Petros Tzeferacos]

Hi Po-Yu,

the error message you are having is misleading.

As Norbert mentioned, the particles used by the laser unit are a different
beast altogether but share some of the infrastructure. To allow for more
rays you need to increase your ed_maxRayCount runtime parameter in the
flash.par, making sure that the total number of rays you are launching does
not exceed this number.

I'll update the error message to reflect this.

Best,
-- Petros


On Tue, Nov 18, 2014 at 2:36 PM, Norbert Flocke <flocke at flash.uchicago.edu>
wrote:

> Hi Po-Yu,
>
> The +laser setup uses -without-unit=Particles, which means that the
> Particles unit is dissabled. What the laser uses is the Grid/GridParticles
> routines to 'handle' particles. The rays from the laser are treated
> as particles when moving them through the grid. So the particles unit is
> different from the actual tools (sitting in the Grid unit) that are used
> to move the particles (in your case the rays) through the grid.
>
> Best regards,
> Norbert
>
>
>
> On Tue, 18 Nov 2014, pchang wrote:
>
>  Hi John,
>> Yes. That's what I did also. More precisely, I tried two ways: (1)have
>> useParticles = .false.  in flash.par (2) have setup variable +laser which
>> automatically set -without-unit=Particles.
>> I think in the log file, it shows "useParticles=F" just to show the run
>> time setting. So I believe the particle unit has been disable. And that's
>> why it doesn't make sense to me when I have an error about particle number
>> when I don't have the unit
>>
>> Best,
>>
>> Po-Yu
>>
>> On 11/18/2014 3:17 PM, John ZuHone wrote:
>>
>>> Hi Po-Yu,
>>>
>>> Silly question, but in the flash.par, you set
>>>
>>> useParticles = .false.
>>>
>>> not
>>>
>>> useParticles=F
>>>
>>> correct?
>>>
>>> Best,
>>>
>>> John
>>>
>>>  On Nov 18, 2014, at 3:13 PM, pchang <pchang at lle.rochester.edu> wrote:
>>>>
>>>> Hi all,
>>>> I am doing simulation for imploding cylindrical target using lasers. I
>>>> am using the hydrodynamics units and don't use the particles unit. In the
>>>> list of RuntimeParameters in the log file, I also have useparticles=F. So,
>>>> I believe I don't have the particles unit in the simulations. It works fine
>>>> when I have less than two laser beams. However, when I added more beams,
>>>> the simulation stopped and gave an error:
>>>>
>>>> Overflow! Mesh PE           9 , gettingFrom           2 , recvCount
>>>> 8068 , max particles       10000
>>>> DRIVER_ABORT: [gr_ptMove]: Insufficient space in particles
>>>> communication buffer: increase pt_maxPerProc
>>>>
>>>> So, my questions are:
>>>>
>>>> (1) I thought the particle unit was not used. Why did it consider the
>>>> number of max particles.
>>>> (2) If I have to have the particle unit, when can I increase
>>>> pt_maxPerProc ? in the flash.par? or as setup variable?
>>>>
>>>> Thank you,
>>>>
>>>> Po-Yu
>>>>
>>>>
>>>> --
>>>> Po-Yu Chang
>>>> Postdoc
>>>> Fusion Science Center,
>>>> Laboratory for Laser Energetics
>>>> University of Rochester
>>>> 250 East River Road
>>>> Rochester, New York 14623
>>>> Phone: (585) 273-5179
>>>> FAX: (585) 275-5960
>>>> pchang at lle.rochester.edu
>>>>
>>>
>>>
>>
>> --
>> Po-Yu Chang
>> Postdoc
>> Fusion Science Center,
>> Laboratory for Laser Energetics
>> University of Rochester
>> 250 East River Road
>> Rochester, New York 14623
>> Phone: (585) 273-5179
>> FAX: (585) 275-5960
>> pchang at lle.rochester.edu
>>
>>


-- 
/* ************************************************* *
     Petros Tzeferacos, PhD

     Research Scientist,
     Associate Director & Code Group Leader,
     Flash Center for Computational Science,
     Department of Astronomy & Astrophysics,
     University of Chicago.
     5747 S. Ellis Ave, Jones Lab. room 317
     Chicago, IL 60637
     Tel. 773-834-3236
     petros.tzeferacos at flash.uchicago.edu
 * ************************************************* */
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