Structured Grid (IJK) : Blockage and Material Data Records

 A Structured Grid (IJK) Blockage and Material Data Set is denoted by a `KEY' of 61 in the data set header record. This data set may be omitted if no blockages or material differences exist. Otherwise, for each grid cell in the model a record is required of the form:

KEY, ICELL, IMAT

To be written with the format:

FORMAT (1X, I2, 2I10)

Where:

KEY = -1 for the data header record -3 for the data set delimiter record which is an otherwise blank record inserted at the end of the data set.

ICELL = Cell (element) number.

$$\gt$$ IMAT = (May simply be used to distinguish between blocked or unblocked cells)

Notes:

1.

One record for each cell in the model is required.

2.

Records must start with cell number 1 and be in ascending cell order.

3.

This data set must come after the Structured Grid (IJK) Definition Data Set (see: B.11) and the Nodal Coordinate Data Set (see: B.3)

4.

If this data set is omitted from the neutral file then all cells will be given a material number = 1.