3D Hybrid Mesh dialog box

Mesh Name
Mesh Name	Lets you specify a name for the mesh.
Objects to Mesh
Select Bodies	Lets you select the bodies (volumes) to mesh. You can also select a selection recipe that contains the geometry to mesh.
Element Properties
Type	Specifies the type of 3D tetrahedral elements that you want in the mesh. These elements fill the areas between the hexahedral elements and the boundary layers or polygon boundaries.The element types that are available depend upon the solver you selected when you created the FEM.
Edit Mesh Associated Data	Appears when you select an element type that requires the definition of additional properties.Opens the Mesh Associated Data where you can define solver-specific properties for the elements. The software applies these properties uniformly to all the elements in the mesh.
Mesh Parameters
Element Size	Regulates the edge length of a hexahedral element and the edge length of the triangles of the surface elements.The software uses the Element Size to regulate the size of the elements if no local element sizes are defined for any of the edges or faces on the solid.
Automatic Element Size	Examines the selected geometry and calculates an estimated element size. The Element Size field updates to show this element size.Note: The element size calculated by Automatic Element Size is an estimate. You should always carefully evaluate your model and use good engineering judgment when determining the element size, regardless of whether you accept the software’s estimate or specify a different size. This evaluation should consider both the unique features of your model's geometry and the requirements of your analysis.
Surface Maximum Growth Rate	For the triangular 2D mesh on the surface of the volume, limits the growth of element size in the interior of a surface. This option controls the maximum amount of element edge length growth from one edge to the next. For example, if you specify a Maximum Growth Rate of 1.3, the edge length growth between adjacent element edges cannot increase more than 30%.
Mesh Quality Options
Midnode Method	For parabolic elements, specifies how their midnodes are projected onto geometry.MixedThe midnodes on an element are projected to the geometry unless this causes the element's Jacobian value to exceed specified the Jacobian threshold.CurvedAll midnodes are projected to the geometry regardless of the resulting element quality.LinearAll midnodes are positioned in a straight line between the two corner nodes.For more information, see Midnode placement for parabolic elements.
Geometry Tolerance	Available when Midnode Method is set to Mixed.Lets you specify the maximum linear distance that the software is allowed to move a node off the polygon geometry.
Jacobian	Sets the maximum acceptable Jacobian value for an element. When the threshold value for Jacobian is exceeded for any given element and Midnodes is set to Mixed, the element's midnodes are not projected to geometry.
Hexahedral Meshing Options
Coordinate System	Lets you create or select a coordinate system that defines the orientation of the hexahedral mesh.
Number of Layers Trimmed at Wall	Specifies the distance between the hexahedral element and the boundaries. The software uses this feature to define the number of hexahedral elements to create in the volume. Increasing this value increases the distance between the hexahedral elements and the boundaries, and reduces the number of hexahedral elements in the mesh. If you specify a large value, the software might not create any hexahedral elements in the volume.Small value****Large value	Small value	Large value
Small value	Large value
Hexahedral Element Type	Specifies the type of 3D hexahedral element that you want: Linear or Parabolic.You can use the following combination of hexahedral elements and tetrahedral elements.Linear hexahedral elements and linear tetrahedral elementsParabolic hexahedral elements and parabolic tetrahedral elementsLinear hexahedral elements and parabolic tetrahedral elements
Model Cleanup Options
Small Feature Tolerance (% of Element Size)	Specifies the percentage of the element size at which a feature should be recognized as a small feature. The software uses the small feature tolerance to determine which features to eliminate during the abstraction process that precedes meshing.Use this option to define a small feature as a percentage of the total element size between zero and 20%. If you specify zero, the software attempts to mesh all features and does not perform any abstraction.
Minimum Element Length (Read-Only)	Displays the value that defines the small features.Example: Element Size = 10 mmSmall Feature Tolerance (% of Element Size) = 10%Minimum Element Length (Read-Only) = 1 mmThe software collapses the element edges that are 1 mm or less in size.
Boundary Layer Options
Appears only when you have at least one Boundary Layer mesh control assigned to the selected body. For more information on options in this group, see Boundary Layer Options group.
Destination Collector
Automatic Creation	Creates a collector using the default physical properties automatically, and inherits the material properties of the idealized part.Note: If you did not use a midsurface to generate the 2D mesh, you must edit the automatically created mesh collector to specify a physical property table that includes thickness properties.Clear the Automatic Creation check box to choose an existing mesh collector from the Mesh Collector list.
Mesh Collector	Available when the Automatic Creation check box is cleared.Lets you select an existing collector. Click New Collector to use the Mesh Collector dialog box to create additional mesh collectors.
Preview
Boundary Nodes	Displays the approximate nodal density along the boundaries of the selected geometry. Use this option to determine whether the element size you specified is appropriate.

How do I

Create a 3D hybrid mesh

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3D hybrid meshing

Setting element size

Understanding the Automatic Element Size calculation

Understanding the geometry abstraction process

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3D Hybrid Mesh dialog box, Simcenter 3D 2021.1 Series

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