JAEA-Data/Code 2007-004 - Welcome to Research Group for ...

ottom starting with a new card. For a three dimensional problem also specify the
number of mesh points and the region width for each region going from front to
back.
In referring to the geometric mesh, rows of mesh points go from top to bottom,
column of mesh points go from left to right, and planes of mesh points go from
front to back. In R and R-Z geometry, a row is a radial traverse. in θ-R and θ-R-Z
geometries, columns radiate downward from a center at the top and a row has
constant radius. In hexagonal and triangular geometries the X and Y are assumed to
be at 60° (upper left-hand corner), and dimensions are on external boundaries;
these treatments are precise only if points on any plane have equal finite-difference
volumes.
Data must be ended for each traverse by a blank entry; if the last card of data is
filled for any traverse (number of entries is a multiple of 6), another blank card is
required.
Region width is specified in cm, and in θ-R and θ-R-Z geometries, θ width is
entered by a radian unit to make 360° to 2π.
Mesh is sub-divided to make equal size, while radial direction is sub-divided to
make equal volume.
Top
5cm 10cm 7cm
X
5cm
Zone 2
Region 1 Region 2 Region 3
Left
5cm
Zone 1
Region 4 Region 5 Region 6
Right
2cm
Region 7 Region 8 Region 9
Bottom
Y
For the above two-dimensional case assuming all mesh intervals are 1 cm, input
data are given as:
---------+---------+---------+---------+-----
004
5 5.0 10 10.0 7 7.0 0
5 5.0 5 5.0 2 2.0 0
---------+---------+---------+---------+-----
109