UG_IO SimSys SPLIT File Type

A SPLIT file contains a list of hex-elements that have split faces. The data for each hex-element with a split face includes the hex-element index, the hex-element face index, four node indices for the matching corner-points, four node indices for the non-matching edge-mid-points, and the node index for the non-matching face-mid-point. AFLR3 outputs a SPLIT file whenever a mesh is generated using the ICE variable size Cartesian code option. It is required to build the element neighbor map with ugrid2vog (LOCI/Chem file converter and preprocessor).

    nsplit
    hex_1 face_1 node_5_1 node_6_1 node_7_1 node_8_1 node_9_1 node_1_1 node_2_1 node_3_1 node_4_1
    hex_2 face_2 node_5_2 node_6_2 node_7_2 node_8_2 node_9_2 node_1_2 node_2_2 node_3_2 node_4_2
    ...
    hex_nsplit face_nsplit node_5_nsplit node_6_nsplit node_7_nsplit node_8_nsplit node_9_nsplit node_1_nsplit node_2_nsplit node_3_nsplit node_4_nsplit

    nsplit   : Number of split hex-element quad-faces.

    hex_i    : Hex-element index.

    face_i   : Hex-element face index.

    node_5_i : Hex-element split quad-face non-matching edge-mid-point node 5 index.
    node_6_i : Hex-element split quad-face non-matching edge-mid-point node 6 index.
    node_7_i : Hex-element split quad-face non-matching edge-mid-point node 7 index.
    node_8_i : Hex-element split quad-face non-matching edge-mid-point node 8 index.
    node_9_i : Hex-element split quad-face non-matching face-mid-point node 9 index.
    node_1_i : Hex-element split quad-face matching corner-point node 1 index.
    node_2_i : Hex-element split quad-face matching corner-point node 2 index.
    node_3_i : Hex-element split quad-face matching corner-point node 3 index.
    node_4_i : Hex-element split quad-face matching corner-point node 4 index.

Note that only hex-elements with one or more split faces are included. Also, a given hex-element may be included multiple times for each of its split faces. The corresponding elements that neighbor each split face are not included. In addition, if an edge-mid-point or face-mid-point does not exist, then the node index is zero. And, the neighbor elements may be hex or tet-elements. More information on hex-elements with split-faces is provided in 3D Input Output Grids.

SPLIT type files are only supported for output files. ASCII formatted is the only file format supported for SPLIT type files.

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