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descriptors that follow. There are nsurface descriptor lines that contain the number
of vertices in the facet and the nodes that define the facet,
Surface materials
The keyword surfmats, denoting surface material data, is an optional
but highly recommended input data type. Up to 128 materials are allowed. After
the keyword line of surface material data is the surface facet centered material ids;
this is an integer array.
Surface velocities
The keyword surfvel indicates that optional surface velocity data
follows. The next three lines of data are the u (x component), v (y component), and
w (z component) surface velocity floating point arrays. Speed and kinetic energy
variable fields will be automatically generated and added to the end of the surface
input variable fields.
Surface variable data fields
The surfvars keyword is used to denote the beginning of any other
surface data fields. The data are entered as a group for each field variable. Up to
100 different field variables are allowed, and each field variable is named by the
user. The endsvars keyword is used to end the field data input. Each field data
variable is defined by two input lines. The first line contains the eight character
name of the variable. The second line is the floating point array for the surface
data.
Surface Selection Flags
The surfflag keyword means that integer selection flag data sets follow.
Up to 10 different types of selection flags and up to 128 different flag values per flag
are allowed. These data sets can be any type of integer data that can be used to
select a node or cell for display purposes. The names for the flags and for the flag
types are placed in selection buttons in a menu. The integer data must be a
number between 1 and ntypes (1 to 128). The endsflag string ends the surface
flag data.
Surfids
The keyword surfids indicates that an optional list of alternate surface
id numbers follows. These alternate id numbers are used for display and reference
purposes within GMV. Enter nsurface integers.
Element groups
The groups keyword is used to denote the beginning sets of arbitrary
elements. A group is a named set of nodes, cells, faces, or surfaces. Up to 1000
10−15