silex_lib_gmsh

Utilities for reading and writing Gmsh meshes and result fields.

SILEXlight.silex_lib_gmsh.WriteResults(filename, nodes, elements, elttype, fields=[])[source]

Write a mesh and optional fields to a Gmsh .msh file.

Parameters:

  • filename (str or path-like) – Output file name without or with .msh extension.

  • nodes (numpy.ndarray) – Node coordinates, shape (n_nodes, 2) or (n_nodes, 3).

  • elements (numpy.ndarray) – Element connectivity array.

  • elttype (int) –

    Gmsh element type id.

    Supported ids in this writer: - 1: 2-node line - 2: 3-node triangle - 3: 4-node quadrangle - 4: 4-node tetrahedron - 5: 8-node hexahedron - 8: 3-node second-order line - 9: 6-node second-order triangle - 11: 10-node second-order tetrahedron

    Common Gmsh ids reference: - 1: 2-node line - 2: 3-node triangle - 3: 4-node quadrangle - 4: 4-node tetrahedron - 5: 8-node hexahedron - 6: 6-node prism - 7: 5-node pyramid - 8: 3-node second-order line - 9: 6-node second-order triangle - 10: 9-node second-order quadrangle - 11: 10-node second-order tetrahedron - 12: 27-node second-order hexahedron - 13: 18-node second-order prism - 14: 14-node second-order pyramid - 15: 1-node point - 16: 8-node second-order quadrangle - 17: 20-node second-order hexahedron - 18: 15-node second-order prism - 19: 13-node second-order pyramid

  • fields (list, optional) – Field descriptors as [values, 'nodal'|'elemental', ncomp, name].

SILEXlight.silex_lib_gmsh.ReadGmshNodes(file, nbcoord)[source]

Read node coordinates from a Gmsh .msh file.

Parameters:

  • file (str or path-like) – Input mesh file.

  • nbcoord (int) – Number of coordinates per node (2 or 3).

SILEXlight.silex_lib_gmsh.ReadGmshElements(file, elmttype, prop)[source]

Read elements of a given type and physical property from Gmsh file.

Parameters:

  • file (str or path-like) – Input mesh file.

  • elmttype (int) –

    Gmsh element type id to extract.

    Currently handled by this reader: - 1: 2-node line - 2: 3-node triangle - 3: 4-node quadrangle - 4: 4-node tetrahedron - 5: 8-node hexahedron - 8: 3-node second-order line - 9: 6-node second-order triangle - 11: 10-node second-order tetrahedron

  • prop (int) – Physical tag to filter elements.

Returns:

(elements, unique_node_ids).

Return type:

tuple