Mesh_region

Contents

Data Structure: Mesh_region
Description	Mesh region data structure
Usage	Mesh_region NUM=ival where ival is the data structure number

Description

Overview

Definition of a Mesh_region allows the definition of a region in the location with target mesh element sizes different from the default mesh element size or other mesh regions (Unstructured mesh only). It should be noted that the mesh regions will assign the target element size to the geometry points enclosed within the defined region. Consequently a mesh region defined within a given domain but which does not contain any geometry point will not have any effect. When the objective is to define a geometry with an initial mesh including a region(s) with finer element sizes, the recommended approach is to use adaptivity. This provides more flexibility in defining mesh regions because target element sizes may be asigned to the nodes of the previous mesh (including nodes internal to the domain). Thus the recommended approach involves:

•1 - Defining separate data files for mesh generation and simulation steps

•2 - In the mesh generation step Adaptivity_control_data and the required\Adaptivity_set_data sets will be used to define the target mesh with the corresponding regions. Remeshing may be enforced with appropiate definition of Error_evaluation_frequency and Maximum_remesh_frequency. The datafile will be used to export a .geo file with the generated mesh.

•3 - The .geo file generated will be read in the simulation datafile.

Region type (Optional)

ELement size for region (Compulsory)

List of groups that use this mesh region (Optional)

List of volumes that use this mesh region (Optional)

List of surfaces that use this mesh region (Optional)

List of lines that use this mesh region (Optional)

Element maximum/minimum size data (Optional)

Size data for mesh region (Optional)