*computeboundarylayerthickness

Calculates the boundary layer thickness reduction factors based on the proximity used for the boundary layer mesh generation.

Syntax

*computeboundarylayerthickness bl_entity_type bl_mark_id non_bl_entity_type non_bl_mark_id string_array number_of_strings

Type

HyperMesh Tcl Modify

Description

This command is used for computing the boundary layer thickness reduction factors based on the proximity used for the boundary layer mesh generation. The input to this command is a list of wall elements (on which the boundary layer needs to be grown), and another list of elements which are not ‘wall’ elements, like inlet, outlet, symmetry, far field, etc.. The output is a load collector named ^CFD_BL_Thickness with loads representing the reduction factors.

Inputs

bl_entity_type
Entity type used for the boundary layer input. Valid values are elements and components.
bl_mark_id
The ID of the mark containing the boundary layer input. Valid values are 1 and 2.
non_bl_entity_type
Entity type used for non-boundary layer input. Valid values are elements and components.
non_bl_mark_id
The ID of the mark containing the non-boundary layer input. Valid values are 1 and 2.
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 and their syntax are:
  • cfd: <first_layer_thickness> <number_of_layers> <layer_growth_rate> <minimum_core_to_boundary_layer_thickness_ratio> <corner_thickness_scaling_factor> <check_for_closure_flag>
  • logfile: <log file path>
number_of_strings
Integer indicating the size (number of strings) in the string array created using *createstringarray.

Examples

To generate thickness reduction factors for the component named wall, with the components named inlet and outlet being the non-boundary layer elements:
*createmark comps 1 wall 
*createmark comps 2 inlet outlet
*createstringarray 1 {{cfd : 0.1 5 1.2 2.0 1.0 1} {logfile: output.txt}}
*computeboundarylayerthickness comps 1 comps 2 1 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

11.0.101