From: paola sala (paola.sala@cern.ch)
Date: Thu Apr 05 2007 - 10:18:54 CEST
Hi
there is no fixed limit for the number of voxels, BUT
there is a limit given by memory:
FLUKA stores all initialization and scoring data in an
indexed blank common. At present this common is set to a
dimension of 200MB. Since each voxel needs an integer*2 storage,
if all the memory could be used for the voxels ( that is never true) the
max n. of voxels would be 100 million.
In practice, the max. number will depend on the problem : n. of
materials, binning structures etc. The program stops with an error
message if the memory limit is exceeded.
In case you really need 400 million voxels, the program should be
re-compiled with a much larger memory limit. This could bring to a
severe loss of computing efficiency if the computer does not have enough
physical memory... let me know
Paola
On Wed, 2007-04-04 at 18:01 -0400, Valery Taranenko wrote:
> Hi,
>
>
>
> I would like to input 400 million voxel phantom into Fluka (these are
> 1-mm voxels).
>
> I could not find in the manual any limitations associated with the
> maximum voxel number.
>
> The number of organs is below 100.
>
>
>
>
>
> Thank you.
>
>
>
> Regards,
>
> Valery Taranenko, Ph.D.
>
> Postdoc Research Associate, RPI, http://rrmdg.rpi.edu
>
> Troy, NY
>
>
>
>
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