Re: [fluka-discuss]:

From: Luigi Salvatore Esposito <>
Date: Sun, 2 Jun 2019 07:55:15 +0000

Dear Nacira,
as indicated by the name, a cylindrical mesh R-Phi-Z is oriented along the Z-axis of the reference frame.
(From the manual: Phi is the azimuthal angle around the Z axis, measured from -pi to +pi relative to the X axis.)

If you want to change the orientation of the cylindrical mesh, you can use a ROT-DEFI transformation and associate it to the USRBIN via the ROTPRBIN card.
An example of a cylindrical mesh with its axis parallel to the x-axis of the reference frame is shown at the end of the section ROTDEFI in the manual.

Lastly, in Flair you can define a new layer (in the geometry tab) to superimpose the USRBIN in your geometry and visually check that it corresponds to your intention.
More details in the Flair manual.

Hope this could help.
Best regards, luigi

> On 1 Jun 2019, at 17:21, Nacira HANOUF <> wrote:
> dear fluka experts,
> I am confused about the geometry in USRBIN cards in structure of the mesh R-Phi-Z.
> I want to know the direction of R and Z for the attached source image (Source coordinate system is at the bottom left of the image)
> <Capture.PNG>

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Received on Thu Jun 06 2019 - 05:22:52 CEST

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