GEO file

The GEO file contains the description of the geometry of the respective PRM file. An example of the GEO data file for an unit square mesh is given in Algorithm .

In the GEO file, fist two lines are descriptions and thus it can be ignored. In the third line, five values need be provided, where the values indicate:

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NEL : Number of Root cells

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NVT : Total Number of Nodes

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NMT/NVpf : Number of nodes on each face for 3D, for 2D its value is 0

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NVE/NVpEL : Number of Nodes in a Root cell

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NBCT/NBF : Number of boundary faces, for 2D its value is 1

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DCORVG : In case of 2D it contains,at each line corresponding to each node, parameters have to be included. If node is at boundary the parameter is in form of $\{\ D\0\\ }$ else if node is not at boundary then parameter is in form of co-ordinates $\{X\ Y\}$

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KVERT : nodes for each Root cell in sequence of anti-clockwise direction for 2D

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KNPR : Contains information whether nodes are boundary nodes or inner nodes. If nodes are at boundary write 1 else 0

Other parameters that are not common in case of 2D and 3D that has to be included:

In 2D, specify :

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KMM : Which nodes finally gets connected

In 3D, specify :

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Boundface : Contains nodes for each face of the cell

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FaceParam : At each line face-parameter contains 4 values i.e

$$\{ cell\_id\,\ localface\_id\,\ boundary\_part\,\ boundary\_component\}$$

FaceParam is used to map local boundary faces of each cell to the boundary_component defined in *.PRM file