Hi Chris,
I am very interested to learn more about your thoughts on this.
There is a big CAE industry for fluid dynamics, electromagnetics,
and structural mechanics, all of which do seem to integrate CAD,
at least well enough so that companies buy their stuff. Do you
have an idea of what distinguishes MC?
There are also commercial radiation modeling products, like
FastRad (Geant4 based I think?) and Attila, that do integrate CAD.
Do you think they are missing something?
Thanks much...........John
On 2/3/16 1:19 PM, Chris Theis wrote:
> Dear Marlon,
>
> The complex geometries which you seem to be referring to have been
> built "manually" without CAD import. CAD import is a widely discussed
> topic but the technical difficulties discussed in the thread that
> you're referring to still stand. Additionally, in the more than 11
> years that I've been working computer graphics industry I have not
> come across one single CAD file in an exchange format which was
> numerically 100% robust and correct so that it would not require
> substantial manual corrections. Often the problems are visually not
> apparent but as soon as you do some mathematical modeling with the
> geometry (Monte Carlo, FEM, etc.) presumably small errors can become
> show-stoppers.
>
> It is not impossible to use CAD with MC but, depending on the
> application, it can be a rather laborious and non-trivial process.
>
>> Currently, Is using SimpleGeo and creating bodies from a 2D
>> background image still the best way to generate complex geometries
>> for Fluka?
>>
>
> This is one possible way and there is also the option in SG to use 3D
> CAD files for verification of the model built by the user. But there
> are several tools out there (e.g. GeoViewer, manual input via Boolean
> algebra), each with its advantages and disadvantages. In the end it
> depends on the user which tool suits him best.
>
> Cheers Chris
>
> On 03 Feb 2016, at 20:42, Marlon Saveri Silva <marlon.saveri_at_lnls.br
> <mailto:marlon.saveri_at_lnls.br>> wrote:
>
>> Dear experts,
>>
>> I would like an update regarding this 2010
>> discussion:
>> http://www.fluka.org/web_archive/earchive/new-fluka-discuss/2726.html
>>
>> I’ve seen some of yours studies with entire sites simulated at Fluka,
>> I wonder if they have been drawn without importing from a CAD file.
>>
>> Currently, Is using SimpleGeo and creating bodies from a 2D
>> background image still the best way to generate complex geometries
>> for Fluka?
>>
>> Att.
>>
>> Marlon Saveri Silva
>>
>> Mechanical Engineer
>> Beamlines Instrumentation and Support Group – SIL
>> Brazilian Synchrotron Light Laboratory– LNLS – CNPEM
>> + 55 (19) 3512-2490
>>
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Received on Thu Feb 04 2016 - 03:42:36 CET