Thank you for the reply,
Would these “ZONE T” definitions be considered global variables, or are “VARIABLES” considered globals?
Below is a snippet from the header of the first two data files. The cells/points that I’m interest in are defined within the zones, " ###.#### WALL_FUNCTION_B1". I would like to basically subdivide the “WALL_FUNCTION” block into smaller selections.
<---------- file 1.dat ---------->
TITLE = “Results ISIS : Surfaces”
VARIABLES = X, Y, Z, “MASS FRACTION”, “PRESSURE”, “HYDRODYNAMIC PRESSURE”, “BLANKING” , “ID_domain”
ZONE T=" 104.4000 WALL_FUNCTION_B1"
Nodes= 14789
Faces= 29020
Elements= 14232
ZONETYPE=FEPolygon
DATAPACKING=BLOCK
NumConnectedBoundaryFaces=0
TotalNumBoundaryConnections=0
#nodes
-46.0142660979566 -45.9717219290694 -45.9531226601512
-45.9956669668536 -45.9307725500004 -45.9121732099462
-45.8726825362817 -45.8912819051069 -45.8526582732924
…(continues)
<---------- file 2.dat ---------->
TITLE = “Results ISIS : Surfaces”
VARIABLES = X, Y, Z, “MASS FRACTION”, “PRESSURE”, “HYDRODYNAMIC PRESSURE”, “BLANKING” , “ID_domain”
ZONE T=" 104.4250 WALL_FUNCTION_B1"
Nodes= 14789
Faces= 29020
Elements= 14232
ZONETYPE=FEPolygon
DATAPACKING=BLOCK
NumConnectedBoundaryFaces=0
TotalNumBoundaryConnections=0
#nodes
-46.0974784458301 -46.0549305167282 -46.0363443949051
-46.0788924617200 -46.0139775182516 -45.9953913253456
…(continues)
Additionally, here are a couple screen shots (zoomed in on the data as to maintain confidentiality)
The contour is colored by point ID, you can see how they change between step 3 & 4,
I feel like the information is there to do what I want to do, but how does one go about updating a selection over time?

