*blmesh_2d2

Generates a 2D boundary layer mesh on boundary layer edges, with specified parameters

Syntax

*blmesh_2d2 base_entity_type base_mark_id num_layers first_layer_thickness growth_rate string_array number_of_strings

Type

HyperMesh Tcl Modify Command

Description

Generates a 2D boundary layer mesh on boundary layer edges, with specified parameters.

Non-boundary layer information is specified using the *blmesh_2d_input_nonbl and boundary layer information is specified using *blmesh_2d_input_bl. If *blmesh_2d_input_nonbl is not called before *blmesh_2d2, then all edges of the selected region are considered as boundary layer edges.

Inputs

base_entity_type
The type of entities to use for the base. Valid values are surfs and elems.
base_mark_id
The ID of the mark containing the base entities. Valid values are 1 and 2.
num_layers
The number of boundary layers to generate.
first_layer_thickness
The thickness value of the first layer.
growth_rate
The growth rate of the boundary layers.
string_array
The ID of the string array that contains the additional input parameters. The string array is created using the *createstringarray command. This should always be set to 1.
Valid parameters include:
element_size
The core mesh element size.
element_type
The core mesh element type.
BL_reduction
Option to reduce BL during meshing.
Auto_BL_reduction
Option to auto reduce BL during meshing.
CoreToBLThicknessRatio
Ratio of core mesh to BL thickness, which is used for BL reduction.
CornerFactor
A dimensionless value used for corner management. The range is 0.1-1.0 for thinner BL thickness, and 1.0-10.0 for thicker BL thickness.
ElemsToSurfComp
Option to organize new elements to surface components.
DefaultBLSelection
Default BL/non-BL selection for all boundary edges. Valid values are:
With_BL
Without_BL_fixed
Without_BL_remesh
number_of_strings
Integer indicating the size (number of strings) in the string array created using *createstringarray.

Examples

To create a 5 layer boundary mesh with a quad dominated mesh of size 2.0 on surface 10, with the first layer being 0.15 thick and a growth rate of 1.2, using boundary layer elements 10 and 11 as fixed and 12 and 13 as float, and non-boundary layer elements 1 and 2 as fixed and 5 and 6 as float:
*createmark elems 1 10 11
*createmark elems 2 12 13
*blmesh_2d_input_bl elems 1 elems 2
*createmark elems 1 1 2
*createmark elems 2 5 6
*blmesh_2d_input_nonbl elems 1 elems 2 1
*createstringarray 2 "element_size: 2.0" "element_type: quads"
*createmark surfs 1 10
*blmesh_2d2 surfs 1 5 0.15 1.2 1 2 2

Errors

Incorrect usage results in a Tcl error. To detect errors, you can use the catch command:
if { [ catch {command_name...} ] } {
   # Handle error
}

Version History

11.0.130