Unified Data Model (UDM): A Library for Parallel I/O and Data Management

Funct onal ty for Unstructured Meshes and Var ables One of the important and powerful functions in the UDM library is the management of unstructured meshes and variables. The library supports a broad range of unstructured meshes, which include meshes with fixed shapes, arbitrary polygons, and arbitrary polyhedrons. A mesh element may be a zone, or face, or edge; i.e., zone-mesh, face-mesh, and edge-mesh. An edgemesh may be 1-D, 2-D, or 3-D; and a face-mesh may be 2-D or 3-D. Mesh elements of a zone-mesh may be made directly from nodes, the elements may be made from edges, and the elements may also be made from faces, and the faces are made from either edges or nodes. The UDM library also supports ghost mesh elements, boundary faces, boundary edges, boundary nodes, slip faces, slip edges, slip nodes, and other options. The variables the library supports include node-, or edge-, or face-, or zone-variables, and the variables may be scalars, vectors, and tensors.