Dear Yang,
Sphere has only one surface with known area. You can split a cylinder
body using planes and count current between regions separated by a plane.
Best regards,
Mikhail
On 27.03.2019 03:48, yangt_at_ihep.ac.cn wrote:
>
> Dear Mikhail,
>
> Thanks for your reply. But how to deal with the curved surface, i.e.,
> borders as cylindrical, sphere or anyother irregular surface?
>
> Best regards!
>
> Yang
>
>
>
> -----原始邮件-----
> *发件人:*"Mikhail Polkovnikov <Михаил Полковников>" <pmk_at_ihep.ru>
> *发送时间:*2019-03-27 02:20:38 (星期三)
> *收件人:* yangt_at_ihep.ac.cn, fluka-discuss_at_fluka.org
> *抄送:*
> *主题:* Re: [fluka-discuss]: problem with usrbdx area
>
> Dear Yang,
>
>
> I suggest you to use a plane as a border between two regions, so
> split void region on several regions which has only one border
> surface, as it already have been suggested:
> http://www.fluka.org/web_archive/earchive/new-fluka-discuss/13362.html
>
>
> Your several Void->Box borders, have become Void1->Box,
> Void2->Box, Void3->Box, ..., Void6->Box with only one rectangular
> surface as a border.
>
>
> Best regards,
> Mikhail
>
>
>
> On 25.03.2019 18:40, yangt_at_ihep.ac.cn wrote:
>>
>> Dear experts and users,
>>
>> Recently, I encounter a small problem with usrbdx area.
>>
>>
>>
>> As shown in the figure, void is a sphere region, box is a cubic
>> region, and material filled in them is both vacuum.
>>
>> I select one-way current scoring and want to get the current per
>> unit area. Assuming we don’t know in advance what is the concrete
>> direction of particles entering the box, and then select the area
>> equal to the contact area of void-> box, eg, the cubic surface area,
>>
>> the value of particle current per unit area is J1; however, in
>> actual the particles’ direction may be perpendicular to one
>> surface as the shadow section shown in the figure, if we choose
>> this area as the contact area in usrbdx card and obtain the
>> particle current/area equal to J2, now J1=1/6 J2, if we select
>> the total surface area of box, we may underestimate the quantity
>> current/area, so how should we choose the area?
>>
>> Best regards!
>>
>> Yang
>>
>
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Received on Wed Mar 27 2019 - 14:53:25 CET