Dear Zhongjian
I would suggest to use two, or more binnings. One with small bin size,
limited to the zone near to the entrance point of the beam and with a
limited span in z-direction. Being it an electron beam, it will quickly
spread over larger area than the original. Then, you can cover the full
dump with a coarser grained binning.
If your beam has cylindrical symmetry, the use of a cylindrical bunning
will greatly improve your statistics. You can also use different
dimensions in radius and in z coordinate, in order to increase the cell
volume
For ansys, I am not an expert. However, if you have multiple overlapping
binnings, you can probably combine them and give to ansysy the input in
variable-sized structure.
Hope this helps
Paola
> analyse
> Date: Tue, 31 Dec 2019 18:58:44 +0800
> Sender: owner-fluka-discuss_at_mi.infn.it
>
>
> Dear experts,
>
> There is a problem puzzled us for a long time. We want to seek some
> suggestions here.
>
> Task description:
> We are trying to analyze the temperature rise and the thermal effect while
> an electron beam impact in to the dump core, whose material is aluminum.
> The dump core is cylindrical, R=30 cm and length is about 2 m.
> The cross section for incidence beam is about 10 um^2.
>
> Methods we planned:
> Step 1. We want to simulate the highest energy deposition inside the whole
> dump core volume, the dimension of bin size about 10 um^3 which equal to
> the incidence beam size.
> Question 1: As we know, due to the limit of maximum bin number, we have to
> simulate many times to find the highest point, or the energy distribution
> in the whole volume. How to get the energy distribution in such small bin
> dimension?
>
> Step 2. Then we want to transfer our energy deposition profile into ANSYS
> software to simulate the material stability.
> Question 2: There are too many grids while input the energy deposition
> profile into ANSYS simulation. Should we need to analysis material
> stability insuch a small dimension?
>
> Any suggestions for Question 1 or Question 2, or other solution for this
> task is appreciated, many thanks in advanced.
>
> Best Wishes!
> Zhongjian
>
>
>
>
>
> __________________________________________________________________________
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>
Paola Sala
INFN Milano
tel. Milano +39-0250317374
tel. CERN +41-227679148
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Received on Wed Jan 01 2020 - 18:09:28 CET