[FLASH-USERS] Disable particles

[Petros Tzeferacos]

That is correct, maxPerProc can be ignored for your case (no Particles
unit).

Best,
-- Petros

On Tue, Nov 18, 2014 at 3:07 PM, pchang <pchang at lle.rochester.edu> wrote:

>  Hi Petros,
> Thank you.
> I will try to increase my ed_maxRayCount runtime parameter. But how about
> pt_maxPerProc? I set it in flash.par and found it is listed under "Ignored
> Parameters". I believe it is because I don't have the unit (particle
> unit?). Do I need to include that? or do I just increase my ed_maxRayCount
> and ignore pt_maxPerProc?
>
> Po-Yu
>
>
> On 11/18/2014 4:04 PM, Petros Tzeferacos wrote:
>
>   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 <%28585%29%20273-5179>
>>>>> FAX: (585) 275-5960 <%28585%29%20275-5960>
>>>>> 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
>  * ************************************************* */
>
>
>
> --
> 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) 275-5960pchang 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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