Unstructured mesh-based geometry type
The unstructured mesh based geometry is a by-product of the unstructured mesh-based multi-physics interface. It can be used to create a geometry universe based on an unstructured mesh.
Contents
Input Syntax
The unstructured mesh based geometry can be created by using the solid 1 or solid 3 input card.
Geometry only (solid 1)
solid 1 UNI BGUNI MESH_SPLIT MESH_DIM SZ1 SZ2 ... SZMESH_DIM POINTS_FILE FACES_FILE OWNER_FILE NEIGHBOUR_FILE MATERIALS_FILE
The first solid type creates an unstructured mesh-based geometry universe. Input values are:
UNI | : universe name for the irregular geometry |
BGUNI | : name of the background universe filling all undefined space |
MESH_SPLIT | : Splitting criterion for the adaptive search mesh (maximum number of geometry cells in search mesh cell) |
MESH_DIM | : number of levels in the adaptive search mesh |
SZi | : Size of the search mesh at level i |
POINTS_FILE | : Path to the unstructured mesh points file |
FACES_FILE | : Path to the unstructured mesh faces file |
OWNER_FILE | : Path to the unstructured mesh owner file |
NEIGHBOUR_FILE | : Path to the unstructured mesh neighbour file |
MATERIALS_FILE | : Path to the unstructured mesh materials file |
Geometry and multi-physics data (solid 3)
solid 3 UNI BGUNI INTERFACE_FILE
It is also possible to create the geometry and bring in temperature and/or density data on the same mesh. In this case, most of the parameters are given in a separate multi-physics interface file which can be re-read by Serpent to update the fields between coupled calculation iterations. The input values in the main input file are:
UNI | : universe name for the irregular geometry |
BGUNI | : name of the background universe filling all undefined space |
POINTS_FILE | : Path to the interface file containing the rest of the parameters |
The input format of each of the linked files is based on the OpenFOAM file format.
Mesh structure/quality
The mesh can consist of arbitrary polygons as long as they can be entered in the OpenFOAM file-format and some quality requirements are met:
- The cells must be closed
- The cells must be convex (i.e. all face and body diagonals must be completely within the cell volume)
- Each face must have exactly one owner cell.
- Each face must have exactly one or zero neighbor cells.