*blmesh_2d_computeblthickness1

Generates boundary layer thickness on boundary nodes, with specified parameters and default boundary layer/non-boundary layer type definition.

Syntax

*blmesh_2d_computeblthickness1 base_entity_type base_mark_id num_layers first_layer_thickness growth_rate core_to_BL_ratio corner_factor string_array number_of_strings

Type

HyperMesh Tcl Modify

Description

Used to generate boundary layer thickness on boundary nodes with specified parameters and default BL/nonBL type definition. *blmesh_2d_input_bl and *blmesh_2d_input_nonbl should be used before calling this command.

Inputs

base_entity_type

The type of entities to use for the base to generate BL thickness. Only elems are valid.

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.

core_to_BL_ratio

Ratio of core mesh to BL thickness, which is used for BL reduction.

corner_factor

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.

string_array

The ID of the string array that contains additional input parameters. The string array is created using the *createstringarray command. This should always be set to 1. Valid strings are:

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 from elements 10-100, with the first layer being 0.15 thick and a growth rate of 1.2, a core-to-BL ratio of 2.5, a corner factor of 1.0, 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 1 "DefaultBLSelection: With_BL"
*createmark elems 1 10-100
*blmesh_2d_computeblthickness1 elems 1 5 0.15 1.2 2.5 1.1 1 1

Errors

Incorrect usage results in a Tcl error. To detect errors, you can use the catch command:

if { [ catch {command_name...} ] } {
   # Handle error
}