3D Hybrid Mesh From Shell dialog box

Mesh Name
Mesh Name	Lets you specify a name for the mesh.
Shell Elements for Hybrid Mesh
Select Elements / 2D Meshes	Lets you select the 2D elements or meshes that you want to use to generate the 3D mesh.Note: The selected 2D elements or meshes must form a closed volume.
Bounding Volume Density Mesh Control
Select Objects	Lets you select a Bounding Volume mesh control. Use this option to apply a local mesh density to the elements that lie in the interior of the bounding volume.For more information, see Bounding volume mesh controls.
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. If you specify a large element size, the software might not create any hexahedral elements in the volume.
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.
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
Mesh Settings
Internal Mesh Gradation	Specifies the value that the software uses as a multiplier for increasing the length of one internal element edge to the next internal edge. Use this option to control the expansion of tetrahedral elements toward the interior of the mesh.Moving the slider towards the minimum setting specifies that tetrahedral elements should remain approximately constant in size throughout the body.Moving the slider towards the maximum setting specifies that tetrahedral elements should expand rapidly towards the center of the body.Note: If you do not want the size of the elements to change, specify a value of 0 in the Internal Mesh Gradation box.
Mesh Interior Volumes	Generates a 3D mesh within an enclosed interior volume that you define by selecting multiple 2D meshes. The software generates one 3D mesh for the outer skin of the volume and a separate 3D mesh for the interior volume.Clear the Mesh Interior Volumes check box if you want the software to generate the 3D mesh for the outer skin only.
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.
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
Show Results	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.

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

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