[FLASH-USERS] Disable particles
pchang
pchang at lle.rochester.edu
Tue Nov 18 16:07:55 EST 2014
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 <mailto: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
> <mailto: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 <tel:%28585%29%20273-5179>
> FAX: (585) 275-5960 <tel:%28585%29%20275-5960>
> pchang at lle.rochester.edu <mailto: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 <tel:%28585%29%20273-5179>
> FAX: (585) 275-5960 <tel:%28585%29%20275-5960>
> pchang at lle.rochester.edu <mailto: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
> <mailto: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) 275-5960
pchang at lle.rochester.edu
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