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POLYGON

Define a region by intersecting two polygons defined in separate XY, XZ or YZ planes.

Required Cards:

POLYGON

Opens the POLYGON blocks within a REGION block

Within the POLYGON block, two of the following:

XY

Specifies a list of coordinates defining a polygon in the XY plane. Two points define a rectangle. N > 2 points define a polygon and must be listed in clockwise or counter-clockwise order.

XY
  x0 y0 z0
  x1 y1 z1
  x2 y2 z2
  ...
  xN yN zN
/

XZ

Same as XY, but in the XZ plane.

YZ

Same as XY, but in the YZ plane.

Optional Cards:

TYPE <string>

Defines whether the region is mapped to all BOUNDARY_FACES_IN_VOLUME or all CELL_CENTERS_IN_VOLUME (BOUNDARY_FACES_IN_VOLUME is only supported for implicit unstructgured grids). Default = CELL_CENTERS_IN_VOLUME

Examples

REGION polyvol_xy
  POLYGON
    XY
      1. 1. 0.
      1. 2. 0.
      2. 2. 0.
      2. 4. 0.
      3. 4. 0.
      3. 2. 0.
      4. 2. 0.
      4. 1. 0.
    /
    XZ
      0. 0. 3.
      5. 5. 4.
    /
  /
END


REGION pond
  POLYGON
    TYPE BOUNDARY_FACES_IN_VOLUME
    XY
      1081.09 512.609 0.
      1008.38 536.404 0.
      957.98 554.706 0.
      904.05 562.406 0.
      817.357 580.904 0.
      734.512 585.373 0.
      683.75 579.356 0.
      605.18 536.218 0.
      585.15 490. 0.
      638.527 440.49 0.
      704.511 387.615 0.
      775.457 384.037 0.
      860.4 401.267 0.
      950.316 432.744 0.
      1015.65 472.986 0.
    /
    XZ
      0. 0. 1.
      1126. 0. -22.
    /
  /
END