Create model and local mesh controls for BatchMesh meshing in the Mesh Controls tab by right-clicking on the BatchMesher folder and selecting Create from the context menu.
| Note: | In order to run a meshing job, at least one model mesh control must be defined. |
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When defining model and local mesh controls, select a parameter mode to determine how criteria and parameters are generated. BatchMesher mesh controls are run using a single CPU.
When generating the mesh, local controls are applied first, starting from the smallest target element size, up to the largest. The model control is then applied.
Generates criteria and parameters using an existing set of files.
Parameters
Parameter
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Description
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Criteria File
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Specify a criteria file that will be used to automatically generate criteria.
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Parameters File
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Specify a parameters file that will be used to automatically generate criteria.
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Mesh Connectivity
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Determines how newly created elements and any adjacent existing elements are connected.
| • | Keep uses existing nodes on any shared boundary edges. |
| • | Break ignores existing adjacent elements and generates mesh according to the element size and type you specified. |
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Generates criteria and parameters on-the-fly by scaling an existing set of files. This parameter mode is useful when you want to evaluate mesh size changes using minimal effort.
Parameters
Parameter
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Description
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Element Size
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Element size used when scaling criteria and parameters.
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Criteria File
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Specify a criteria file that will be used to automatically generate criteria.
The "min size" and "max size" thresholds are created by simple proportional scaling of the base thresholds to the requested element size. All other criteria is not changed.
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Parameters File
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Specify a parameters file that will be used to automatically generate criteria.
All dimensionless parameters and options are not changed.
All parameters having a length dimension are proportionally scaled using the scale factor target size/original size.
| • | Max thin solid thickness (for midsurface extraction) |
| • | Surface holes table: radii ranges and washers widths, target radii if given directly ( not as a radius fraction ) |
| • | Solid holes table: radii ranges |
| • | Surface fillet table: radii and widths ranges, maximal chordal deviation |
| • | Flanges recognition: max and min flanges width, maximal width for narrow surface width allowed to be deleted |
| • | Duplicated surfaces search tolerance – scaled if 0.5 < scale_factor < 2 |
| • | Edges equivalencing tolerance – scaled if 0.5 < scale_factor < 2 |
| • | Narrow fillets merging width threshold |
| • | Beads to be removed maximal height |
| • | Flanged holes to be removed maximal height |
| • | edge fillets defilleting - max radius |
| • | logos to be removed : maximal height and depth |
| • | threads to be removed max depth |
| • | trias reduction maximal and minimal elements size |
| • | elements warpage fix – maximal offset normally to surfaces |
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Mesh Connectivity
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Determines how newly created elements and any adjacent existing elements are connected.
| • | Keep uses existing nodes on any shared boundary edges. |
| • | Break ignores existing adjacent elements and generates mesh according to the element size and type you specified. |
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Generates criteria and parameters on-the-fly using very basic and limited input parameters. This parameter mode is useful for basic and simple use cases, where existing parameter and criteria files do not exist and you do not have strict mesh requirements.
Criteria
The following mesh control input parameters are automatically populated within specific Criteria file fields. The Min Size - Good/Warn/Worst and Max Size - Good/Warn/Worst are internally calculated. All other Criteria file settings are hard-coded.
Mesh Control Input Parameter
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Criteria File Field
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Element Size
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Target element size
Min Size - Ideal
Max Size - Ideal
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Minimum Element Size
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Min Size - Fail
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Maximum Element Size
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Max Size - Fail
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Parameters
The following mesh control input parameters are automatically populated within specific Parameter file fields. All other parameters and behaviors are kept as default.
Mesh Control Field
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Parameters File Field
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Element Size
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Target element size
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Element Type
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Create mesh with element type, with “align” and “size” checkboxes enabled.
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Element Order
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Element order
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Element Feature Angle
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Feature angle during element cleanup
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Geometry Cleanup
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Enables or disables, in its entirety, the Geometry cleanup section
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When Geometry Cleanup is enabled, two threshold radii are defined as:
| • | min_rad = max(0.4*Element Size, 0.8*Minimum Element Size) |
| • | mid_rad = max(0.6*Element Size, min_rad) |
| • | max_rad = 3.0*Element Size |
Enabling the Geometry Cleanup parameters listed below, facilitates the following behaviors.
| • | Remove Small Holes removes small surface and solid holes with a radii range of 0 – min_rad. |
| • | Create Washers creates one layer of washers with a minimum of 6 elements and an auto-defined width for surface holes in the min_rad – max_rad range. |
| • | Seed Holes enables hole seeding for surface and solid holes, per the rules below. If Create Washers is enabled, this is ignored for surface holes. |
| o | min_rad – mid_rad = 4 elements minimum |
| o | mid_rad – max_rad = 6 elements minimum |
| • | Allow Movement Across Edges enables major post-mesh element cleanup operations to improve the final element quality at the expense of edge capturing and performance. |
| • | Advanced Feature Capture enables improved feature capturing at the expense of element quality and performance. |
In the Parameters file, the following parameters are automatically defined. All other parameters are kept as default.
| • | Extract midsurfaces is enabled with the Method set to skin offset. |
| o | Surface fillet recognition |
| ▪ | The following thresholds are defined: |
| • | min_rad = 0.7*max(0.4*Element Size, Minimum Element Size) |
| • | min_wid = 0.49*Pi*min_rad |
| • | mid_rad = 1.307*max(0.5*Element Size, Minimum Element Size) |
| • | mid_wid = 0.5*Pi*mid_rad |
| • | max_rad = 1.5*Element Size |
| • | max_wid = 0.51*Pi*max_rad |
| ▪ | The following number of elements rows are enforced: |
| • | min_rad – mid_rad and min_wid – mid_wid = 1 element across |
| • | mid_rad – max_rad and mid_wid – max_wid = 2 elements across |
| o | Flange recognition is enabled with: |
| ▪ | Elements across flange width = 2 |
| ▪ | Maximum width of flange = 3.5*Element Size |
| ▪ | Minimum width of flange = max(0.5*Element Size, Minimum Element Size) |
| ▪ | Delete flange narrow surfaces with width < = auto |
| ▪ | Suppress beads with height < = min( 0.2*Element Size, Minimum Element Size) |
| ▪ | Suppress flanged holes with height < = min(0.15*Element Size, Minimum Element Size) |
| ▪ | Remove edge fillets with radius < = 0.9*Element Size |
| ▪ | Remove logo with size < = 3.0*Element Size, and height < = min(0.15*Element Size, Minimum Element Size) |
| o | Apply tria reduction with min elem size > = 0.5*Element Size and max size < 1.5*Element Size |
| o | Move across free edges, max dist < = 0.0025 * element size |
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