The number of sub-blocks in the computational domain where the turbulence model is suppressed to make the flow laminar is designated in the "general input" section (BOUNDARY AND CUT CONTROL) by the parameter LAMINAR SUB-BLOCKS (>= 0). The first line of input for this section is a comment line for comments about the input to follow (the $ delineator is not required). The sub-block is created as a subset of a grid block defined by a bounding box in computational space. This subset (or sub-block) is defined by the beginning and ending grid point indices specified in the I, J, and K directions.

Example: Comment line and laminar sub-block definition

Where:

LAM S.B.: CHARACTER STRING; Sub-block name. Up to 10 characters used to indicate where the sub-block is located. Not used by code; provided as a user convenience.

BLK:INTEGER; Block number of the sub-block in which turbulence is suppressed.

DIR1:CHARACTER STRING; Direction "1" for defining the sub-block window.
I = I constant boundary
J = J constant boundary
K = K constant boundary

BEG:CHARACTER STRING; Grid point at which to begin sub-block which runs in the direction specified by DIR1.
MIN = Start at minimum index of DIR1
MAX = Start at maximum index of DIR1
25  = Start at index 25 of DIR1

END: CHARACTER STRING; Grid point at which to end sub-block which runs in the direction specified by DIR1.
MIN = End at minimum index of DIR1
MAX = End at maximum index of DIR1
65  = End at index 65 of DIR1

NOTE 1: BEG must be less than END by at least 1.

NOTE 2: The sequence (DIR1, BEG, END) is repeated twice, for DIR2 and DIR3.

TRAN_TYPE: CHARACTER STRING; Identifies the transition treatment of the sub-block.
LAMINAR = Flow is forced to be laminar in this subdomain
TRANSTN = Flow is forced to be transitional in this subdomain. (this option is not currently supported)