**RZ**

This command adds points to the mesh. It can distribute points evenly or according to a ratio zoning method.

**xyz** specifies Cartesian coordinates.

**rtz** specifies cylindrical coordinates.

**rtp** specifies spherical coordinates.

**line** this option implies xyz and will distribute n1 nodes from
(xmin,ymin,zmin) to (xmax,ymax,zmaz)

When using the rtz or rtp coordinate systems the center is at
(0,0,0). Use a **trans** command to move the center. For the
**rtz** command, minimum and maximum coordinates are the triplets:
radius from the cylinder’s axis, angle in the xy-plane measured from
the x-axis and height along the z-axis. For the **rtp** command
minimum and maximum coordinates are the triplets: radius from the
center of the sphere axis, angle in the zy-plane measured from the
positive z-axis and the angle in the xy-plane measured from the
positive x-axis (see II.a.11). Note that the **rtz** always results
in a (partial) cylinder of points centered around the z axis. Use
the **rotateln** command to orient the cylinder. For example, to
center the cylinder around the y axis, specify the x axis as the
line of rotation in the **rotateln** command.
ni,nj,nk number of points to be created in each direction.

xmin,ymin,zmin minimums for coordinates.

xmax,ymax,zmax maximums for coordinates.

iiz,ijz,ikz if =0 then mins and maxs are used as cell centers

if =1 then mins and maxs are used as cell vertices

iirat,ijrat,ikrat ratio zoning switches (0=off,1=on)

xrz,yrz,zrz ratio zoning value - distance is multiplied by this value for each subsequent point.

**FORMAT:**

**rz** **/xyz** **rtz** **rtp**ni,nj,nk/xmin,ymin,zmin/xmax,ymax,zmax/ iiz,ijz,ikz/[iirat,ijrat,ikrat/xrz,yrz,zrz/]

**rz/line**/np///xmin,ymin,zmin,xmax,ymax,zmax/iiz,ijz,ikz/

**EXAMPLES:**

```
rz /xyz /5,3,10 /0.,2.,0. /5.,6.,2. /1,1,1/
```

This results in a set of 150 points, five across from x=0. to x=5., 3 deep from y=2. to y=6. and 10 high from z=0. to z=2.

```
rz/rtz/4,6,11 /0.,0.,0. /3.,360.,10. /1,0,1/
```

This results in 264 points arranged around the z- axis. There are 3
rings of points at distances r=1., r=2. and r=3. from the z-axis.
There are 11 sets of these three rings of points and heights z=0.,
z=1., z=2.,…,z=10. In each ring there are 6 points where each pair
of points is separated by 60°; note that ijz=0 requests that points be
placed at cell centers, hence the first point will be at 30° not at
0°. Corresponding to r=0, there will be 6 identical points at 11
intervals along the z-axis at heights z=0., z=1., z=2.,…z=10.
**Filter** should be used to remove these duplicate points.